OCD vs Hoarding Disorder: What Is the Difference? Saving, Intrusive Thoughts, Distress, and Diagnosis
Obsessive-compulsive disorder (OCD) and hoarding disorder can produce behavior that looks similar from the outside, especially when someone saves objects, avoids discarding, or becomes distressed when asked to throw things away. Clinically, however, they are separate disorders with different core symptom patterns. The central question is not simply whether a person keeps too many possessions. It is why the person feels compelled to keep them, what thoughts and emotions are activated by discarding, whether clutter has accumulated to the point of impairing living spaces, and whether a broader obsession-compulsion cycle is present.
The American Psychiatric Association defines hoarding disorder by persistent difficulty discarding possessions, a perceived need to save them, distress associated with discarding, and accumulation that compromises the use of living areas or causes clinically significant impairment. OCD, by contrast, is defined by obsessions, compulsions, or both. A person can have OCD without hoarding disorder, hoarding disorder without OCD, or both diagnoses at the same time. See the American Psychiatric Association on hoarding disorder, its OCD clinical overview, and the review by Worden and Tolin, 2022.
This distinction matters because the same visible act can arise from different psychological mechanisms. Keeping an old newspaper because it feels uniquely meaningful, potentially useful, or too painful to lose can fit hoarding disorder. Keeping the same newspaper because an intrusive thought says that discarding it might cause a family member to die can function as an OCD compulsion. Treatment follows the mechanism, not the appearance of the behavior.
Quick answer: what is the difference between OCD and hoarding disorder?
OCD is organized around obsessions and compulsions. Obsessions are recurrent, intrusive, unwanted thoughts, images, or urges. Compulsions are repetitive behaviors or mental acts performed in response to obsessions, rigid rules, or a need to prevent feared outcomes or achieve a sense of completeness. If you need the broader clinical framework, see our guide to what OCD is.
Hoarding disorder is organized around persistent difficulty discarding or parting with possessions because of a perceived need to save them and distress associated with discarding. The resulting accumulation clutters active living areas and impairs their intended use unless other people intervene. The World Health Organization recognizes hoarding disorder in ICD-11 within the obsessive-compulsive and related disorders grouping. See the WHO ICD-11 overview.
The fastest clinical distinction is functional: in OCD-driven saving, retention usually serves an obsessional rule, feared consequence, neutralizing function, or incompleteness signal. In hoarding disorder, saving is usually tied more directly to perceived utility, sentimental meaning, identity, responsibility for possessions, aesthetic value, information value, or fear of waste and regret. These patterns can overlap, and only a full assessment can determine whether one disorder, the other, or both are present.
Why hoarding disorder was separated from OCD
Hoarding was historically treated as an OCD symptom dimension, and many older OCD measures included hoarding items. That history still influences public language such as “hoarding OCD.” Research increasingly showed, however, that clinically significant hoarding often occurred without the broader obsession-compulsion pattern typical of OCD. Hoarding also showed distinct beliefs about possessions, patterns of insight, comorbidity, course, and response to treatment.
A large clinical study by Frost, Steketee, and Tolin found that fewer than 20% of 217 participants with hoarding disorder also met criteria for OCD. Frost et al., 2011. A later review concluded that OCD co-occurs in roughly one fifth of people with hoarding disorder while emphasizing that the two disorders remain diagnostically distinct. Worden and Tolin, 2022.
The separation also improved treatment logic. A meta-analysis of 21 studies involving 3,039 people with OCD found that participants with hoarding symptoms were substantially less likely to respond to traditional OCD treatments than those without hoarding symptoms. The pooled odds ratio for response was 0.50. Bloch et al., 2014. That finding comes largely from an era when hoarding was often measured as an OCD dimension, so it should not be treated as a modern head-to-head trial of DSM-5 hoarding disorder versus OCD. It does, however, help explain why the field moved toward a separate formulation and hoarding-specific treatment.
What saving looks like in OCD
Saving can be a true OCD compulsion when it is driven by an obsession, a feared consequence, a rigid rule, or a need to neutralize uncertainty. The object may have little emotional value in itself. What matters is what discarding it seems to mean or what the person fears discarding might cause.
For example, a person may keep every receipt because an intrusive thought says that throwing one away could lead to a tax investigation and ruin the family. Another person may keep contaminated-looking packaging because throwing it out feels as if contamination could spread to a sanitation worker. Someone else may preserve broken objects because discarding them triggers a belief that they are morally responsible for wasting resources. A person with symmetry or incompleteness symptoms may keep objects until they can be sorted, photographed, checked, or discarded according to a precise ritual.
In these cases, the saving behavior belongs to an obsession-compulsion cycle. The person experiences an intrusive thought or internal signal, interprets it as important or threatening, feels distress or incompleteness, performs the saving behavior, and obtains temporary relief. That relief reinforces the compulsion. Our articles on OCD obsessions and OCD compulsions explain this mechanism in more detail.
A case series specifically examined severe hoarding behavior that was better explained as OCD. The authors emphasized motivations linked to classic obsessional themes rather than the typical possession-centered beliefs of hoarding disorder and concluded that this presentation appears to represent a minority of severe hoarding cases. Pertusa, Frost, and Mataix-Cols, 2010.
What saving looks like in hoarding disorder
In hoarding disorder, the central problem is persistent difficulty discarding possessions because the person feels a need to save them and experiences distress at the prospect of parting with them. The possessions may be seen as useful, beautiful, emotionally significant, identity-bearing, informationally important, or potentially valuable in the future. A person may also feel responsible for using an item correctly or avoiding waste.
The emotional logic is therefore often possession-centered. The thought may be “I will need this someday,” “this is part of my history,” “throwing this away would be wasteful,” “I may lose an important memory,” or “someone could use this.” The problem becomes clinically significant when these decisions lead to persistent accumulation, clutter, loss of functional living space, distress, impairment, or safety problems.
The American Psychiatric Association describes clutter that compromises active living areas as a hallmark of hoarding disorder and notes that excessive acquisition is common, although it is not required in every case. American Psychiatric Association.
This does not mean that every person with hoarding disorder enjoys every possession or feels no distress about the clutter. Shame, family conflict, anxiety, grief, indecision, embarrassment, and frustration are common. The key point is that the distress around discarding often arises from losing the possession, wasting it, making the wrong decision, or giving up its perceived meaning or future use, rather than from the classic OCD structure of neutralizing an intrusive obsession.
Intrusive thoughts: one of the most important differences
Intrusive thoughts can occur in many mental states, so the presence of an upsetting thought does not automatically identify OCD. In OCD, obsessions are recurrent and unwanted, and they often feel inconsistent with the person's values, intentions, or sense of self. They may concern harm, contamination, morality, sexuality, religion, relationships, identity, mistakes, or uncertainty. The person typically attempts to suppress, neutralize, check, avoid, or obtain certainty about them.
If an object is saved because of such an obsession, the saving can be an OCD compulsion. For example, “If I throw away this child's drawing, it means I do not love my child” may lead to repeated saving, photographing, checking feelings, or seeking reassurance. Another person may think, “If I discard this paper, I might accidentally destroy evidence that could prove I harmed someone.” The object becomes part of a threat-neutralization system.
In hoarding disorder, thoughts about possessions may be repetitive and emotionally intense, but they are often experienced as plausible reasons for saving rather than as intrusive obsessional content that must be neutralized. The person may genuinely endorse the importance, usefulness, uniqueness, or sentimental meaning of the item. Insight varies in both disorders, so this distinction is informative rather than absolute. For a deeper explanation of obsessional cognition, see our guide to OCD intrusive thoughts.
Distress differs in timing and meaning
Both disorders can produce severe distress, but the timing and meaning of that distress often differ.
In OCD, distress commonly begins with the obsession or internal trigger. The compulsion, including saving, is performed to reduce distress, prevent a feared event, resolve uncertainty, or make something feel complete. Relief is usually temporary, which strengthens the cycle.
In hoarding disorder, distress often becomes especially intense when discarding is proposed, when someone moves possessions, when access to possessions is threatened, or when the person must decide what to keep. The act of saving itself may feel justified, protective, meaningful, or relieving. The clutter can still be deeply distressing, especially because of social consequences, family conflict, shame, financial pressure, housing problems, or safety concerns.
Clinicians therefore ask not only “Does throwing this away make you anxious?” but also “What exactly is the anxiety about?” Fear of catastrophe, moral responsibility, contamination, or an obsessional rule points in a different direction from grief over losing the object, fear of waste, attachment, identity, or anticipated regret.
Insight is useful but cannot diagnose the disorder by itself
A common oversimplification says that OCD is always ego-dystonic and hoarding disorder is always ego-syntonic. Reality is more variable. OCD can occur with good, poor, or absent insight, and a person with hoarding disorder may recognize the clutter as dangerous or excessive while still feeling unable to discard. ICD-11 and DSM-based clinical descriptions both recognize variation in insight.
The clinically useful question is how strongly the person believes the saving is necessary and how they understand the consequences. Someone with OCD may say, “I know keeping this makes no sense, but I cannot tolerate the possibility that something terrible will happen.” Someone with hoarding disorder may say, “I know the room is unusable, but these objects matter and throwing them away would be a serious mistake.” Either person can have partial or fluctuating insight.
Poor insight therefore changes the clinical presentation but does not erase the need to identify the underlying symptom structure. A diagnosis should not be assigned from one statement such as “I know this is irrational” or “I do not think I have a problem.”
Clutter is central to hoarding disorder but not sufficient for diagnosis
Visible clutter matters greatly in hoarding disorder because diagnostic criteria focus on accumulation that congests active living areas and substantially compromises their intended use. A bedroom that cannot be slept in, a kitchen that cannot be used safely, blocked exits, inaccessible plumbing, or narrow pathways can indicate severe functional impact.
Yet clutter alone does not diagnose hoarding disorder. Severe disorganization can arise from major depression, ADHD, neurocognitive disorders, psychosis, physical disability, brain injury, housing instability, bereavement, or other circumstances. A person with OCD may also accumulate objects because discarding has become ritualized. The diagnostic task is to determine why the accumulation occurred and whether the full hoarding-disorder pattern is present.
The same principle applies in the opposite direction: a person can have clinically important difficulty discarding before a home reaches the extreme clutter portrayed in television programs. Early or partially controlled hoarding can still create distress and impairment, especially when family members repeatedly clear spaces or when the person uses storage units or multiple locations.
Excessive acquisition points more strongly toward hoarding disorder
Many people with hoarding disorder also acquire excessively through buying, collecting free items, accepting objects, or picking up discarded materials. Excessive acquisition is not required for every diagnosis, but it is common enough to be clinically informative. The acquisition may be triggered by perceived opportunity, uniqueness, utility, or fear of missing out on an item that could later become important.
In OCD, acquisition can occur, but clinicians ask whether it functions as a compulsion. A person may buy duplicates because of contamination fears, purchase backup items because uncertainty feels intolerable, or acquire objects to neutralize a responsibility obsession. Again, the visible action is less informative than its function.
Can someone have both OCD and hoarding disorder?
Yes. The disorders are separate, and they can co-occur. In the Frost, Steketee, and Tolin study, fewer than 20% of people with hoarding disorder also met criteria for OCD. Frost et al., 2011. The 2022 review of co-occurring OCD and hoarding disorder places the overlap at around 20% and notes that the combined presentation may involve greater non-hoarding OCD symptoms and additional anxiety, depressive, and tic-related difficulties. Worden and Tolin, 2022.
A dual diagnosis is appropriate when a person independently meets criteria for both disorders. For example, someone may have longstanding difficulty discarding possessions because of sentimental attachment and perceived future usefulness, causing severe clutter, while also having contamination obsessions and washing compulsions. The hoarding is not merely a manifestation of the contamination OCD; both symptom systems are present.
Our separate article on OCD and hoarding disorder focuses specifically on the relationship, comorbidity, and treatment implications. This page owns the differential-diagnosis question: how to tell the two conditions apart.
How clinicians distinguish OCD-driven saving from hoarding disorder
A careful differential diagnosis begins with the saving behavior itself but does not stop there. The clinician asks what the person saves, how long the pattern has existed, what happens emotionally and cognitively when discarding is considered, whether the person excessively acquires, how much clutter is present, and which living spaces have lost their intended function.
The next question is functional: what does keeping the object accomplish? If keeping the object prevents a feared catastrophe, neutralizes guilt, satisfies a ritual rule, reduces obsessional uncertainty, or resolves a “not just right” feeling, OCD becomes more likely as the driver of that specific behavior. If keeping the object preserves sentimental meaning, avoids waste, protects a perceived future use, maintains identity, or prevents anticipated regret and loss, hoarding disorder becomes more likely.
Clinicians then look beyond the saving. OCD usually produces other obsessions, compulsions, mental rituals, reassurance seeking, checking, avoidance, or repeated attempts to gain certainty. Hoarding disorder usually produces a broader pattern of difficulty discarding, accumulation, sorting and decision-making problems, and often excessive acquisition.
The final assessment asks whether another condition explains the behavior better. Our broader guide to OCD differential diagnosis explains how clinicians separate OCD from related psychiatric presentations.
Clinical example: fear-driven saving in OCD
Imagine a person who keeps every handwritten note received from family members. The room contains boxes of paper, but the person does not describe the notes as beautiful, useful, or emotionally irreplaceable. Instead, an intrusive thought says that discarding a note could cause harm to the person who wrote it. The person repeatedly checks whether the note contains a hidden warning, photographs it, stores the images in multiple places, and asks family members for reassurance that no harm will occur.
The saving is embedded in a threat-neutralization sequence. The object is retained because discarding feels dangerous. If the feared consequence and checking rituals disappear, the motivation to keep the note may also disappear. That pattern is more consistent with OCD-driven saving.
Clinical example: possession-centered saving in hoarding disorder
Now imagine another person who keeps newspapers, packaging, old clothing, tools, mail, and broken household items. The person believes many objects could be useful later, worries that discarding them would be wasteful, feels sentimental about ordinary possessions, and experiences strong regret when asked to choose what to remove. Acquisition continues because free or discounted items feel too valuable to leave behind.
The home gradually loses functional space. Chairs cannot be used, a guest room becomes storage, and kitchen surfaces are buried. There is no single intrusive catastrophe being neutralized and no clear obsessional ritual governing the saving. The persistent need to save, distress when discarding, accumulation, and impairment are more consistent with hoarding disorder.
Clinical example: both disorders at the same time
A third person has severe clutter caused by years of difficulty discarding ordinary possessions because of sentimental attachment and fear of waste. Separately, the person has harm obsessions and checks locks for hours each night. Some retained items are saved because they “might be useful”; a smaller set is kept because throwing them away triggers a specific obsession that someone will be injured.
This person may meet criteria for both hoarding disorder and OCD. Treatment planning would need to distinguish which possessions belong to the hoarding pattern and which are part of an OCD compulsion, because the therapeutic targets are related but not identical.
How diagnosis is made
Neither OCD nor hoarding disorder is diagnosed from a single questionnaire, a photograph, a clutter score, or a person's statement that they “hoard.” Diagnosis requires a clinical assessment of symptoms, duration, distress, impairment, functional consequences, alternative explanations, and relevant comorbidity.
For OCD, clinicians assess obsessions, compulsions, time consumed, distress, impairment, avoidance, insight, and whether another disorder better explains the symptoms. See our guide to OCD diagnosis.
For hoarding disorder, assessment typically examines difficulty discarding, the perceived need to save, distress related to discarding, clutter, acquisition, safety, impairment, and insight. It may include photographs or home-based assessment when appropriate because office interviews cannot always capture the severity or functional impact of clutter. A major review by Frost, Steketee, and Tolin describes diagnosis and assessment as a multidimensional process rather than a simple clutter count. Frost et al., 2012.
What screening and severity tools can tell you
Several validated measures can support assessment, but they do not replace diagnosis.
The Hoarding Rating Scale-Interview is a brief clinician-administered measure that assesses clutter, difficulty discarding, acquisition, distress, and impairment. Its validation study found strong reliability and good discrimination between hoarding and non-hoarding groups. Tolin et al., 2010.
The Saving Inventory-Revised is a self-report measure covering difficulty discarding, clutter, and excessive acquisition. It can help quantify hoarding symptoms and track change over time. Frost, Steketee, and Grisham, 2004.
OCD severity is commonly assessed with OCD-specific instruments such as the Yale-Brown Obsessive Compulsive Scale in clinical settings. A high score on one measure does not rule in or rule out the other disorder, and a screening cutoff is not equivalent to a diagnosis. The key differential question remains the function and context of the behavior.
What else can look like hoarding?
Difficulty discarding and clutter require a broad differential assessment. Major depression can lead to profound neglect and inability to organize without a primary perceived need to save possessions. ADHD can contribute to disorganization, unfinished sorting, indecision, and accumulation. Psychotic disorders can produce saving based on delusional beliefs. Major neurocognitive disorders can impair judgment and organization. Brain injury and other medical conditions can change behavior. Autism can include collecting, restricted interests, routines, or attachment to objects for reasons that do not fit either classic OCD or hoarding disorder.
Ordinary collecting must also be distinguished from hoarding disorder. Collecting can be extensive, expensive, emotionally meaningful, and time-consuming without being a mental disorder. Collections are usually organized and intentionally curated, and they do not typically compromise the normal use of living spaces. The American Psychiatric Association explicitly distinguishes collecting from hoarding disorder on these functional grounds. American Psychiatric Association.
Poverty, migration, unstable housing, cultural norms, professional archives, inherited belongings, and temporary life transitions can also shape saving. Diagnosis requires context rather than a universal standard of tidiness.
Why “hoarding OCD” is an imprecise label
People often use “hoarding OCD” to describe any severe saving behavior. Clinically, the phrase can hide several different realities.
One possibility is OCD-driven saving: the person keeps items as a compulsion in response to obsessions. Another is hoarding disorder without OCD. A third is true comorbidity, where both disorders are present. A fourth is another condition producing clutter or retention.
Because these pathways have different formulations, the phrase “hoarding OCD” should be treated as an informal description rather than a diagnosis. The clinically useful question is whether the saving is best explained by OCD, hoarding disorder, both, or another condition.
Does hoarding disorder involve obsessions and compulsions?
Hoarding disorder belongs to the obsessive-compulsive and related disorders family, but its defining symptoms are not the same as OCD obsessions and compulsions. A person with hoarding disorder can have repetitive thoughts about possessions and can feel compelled to save, yet the diagnostic core remains difficulty discarding because of a perceived need to save, with distress and accumulation.
OCD requires obsessions, compulsions, or both. The content, function, and relationship to the behavior matter. Using everyday language such as “obsessed with saving” or “compulsive shopper” does not establish an OCD diagnosis.
Does OCD cause clutter?
It can. OCD can indirectly produce clutter when discarding becomes tied to checking, contamination, responsibility, perfectionism, symmetry, memory distrust, or fear of making an irreversible mistake. A person may delay decisions indefinitely, preserve items for checking, keep “contaminated” objects isolated, or avoid touching possessions required for sorting.
The clinical question is whether the accumulation meets criteria for hoarding disorder in its own right or whether it is better explained by OCD. Current diagnostic descriptions exclude a separate hoarding-disorder diagnosis when the hoarding is better explained by another disorder, including OCD; the disorders can still coexist when independent hoarding-disorder symptoms are also present. See the American Psychiatric Association clinical overview.
Does hoarding disorder always involve extreme homes like those shown on television?
No. Severe cases can involve dangerous clutter, blocked exits, inaccessible rooms, sanitation problems, or fire risk, but diagnostic assessment is not based on television-level severity. The disorder exists on a spectrum of severity. Some people maintain partially usable spaces through constant moving of possessions, storage units, family intervention, or repeated cleanouts.
The central features are persistent difficulty discarding, a perceived need to save, distress associated with discarding, and clinically significant accumulation or impairment. Severity is judged by real functional consequences, not by whether a home looks dramatic.
How common is hoarding disorder?
A 2019 systematic review and meta-analysis included 11 epidemiologic studies with 53,378 participants and estimated a pooled prevalence of 2.5% among working-age adults, with a 95% confidence interval of 1.7% to 3.6%. Postlethwaite et al., 2019. Estimates vary across studies and populations, and prevalence is not a diagnostic tool for an individual person.
The American Psychiatric Association gives a similar population estimate of roughly 2% to 3%. American Psychiatric Association.
Why the distinction changes treatment
The difference between OCD and hoarding disorder is clinically important because the treatment targets differ.
For OCD, exposure and response prevention is a core evidence-based psychological treatment. When saving is an OCD compulsion, treatment may involve exposure to the uncertainty or feared meaning of discarding while preventing checking, reassurance, neutralization, avoidance, or other compulsions. American Psychiatric Association.
Hoarding disorder is generally treated with hoarding-specific cognitive behavioral therapy. Treatment may include motivational work, decision-making and categorization skills, practice resisting acquisition, gradual sorting and discarding, cognitive work on beliefs about possessions, and repeated practice in the environments where the problem occurs. The American Psychiatric Association identifies CBT as a central treatment approach for hoarding disorder. American Psychiatric Association.
A 2025 state-of-the-science review concluded that hoarding-focused CBT is the intervention with the clearest evidence while noting that outcomes remain modest for many patients. Tolin, Worden, and Levy, 2025. A 2025 systematic review and meta-analysis of 41 studies and 47 samples also found meaningful improvement from psychological interventions, while emphasizing that many people remain above clinical cutoffs after treatment. O'Brien and Laws, 2025.
When both OCD and hoarding disorder are present, treatment may need separate goals for each symptom system. The current literature does not establish one universal sequencing protocol for the combined presentation. Worden and Tolin, 2022.
Safety and urgent practical concerns
Severe clutter can create fire hazards, blocked exits, falls, sanitation problems, difficulty accessing medications or appliances, and conflict with housing or public-health requirements. These risks require practical assessment alongside psychological treatment.
Safety intervention should still be coordinated with treatment whenever possible. Removing possessions without addressing the underlying saving and acquisition processes may produce intense distress and does not by itself treat hoarding disorder. The goal is to restore safe function while addressing the mechanisms that created the accumulation.
If there is immediate danger from fire, structural instability, inability to access essential utilities, unsafe animal conditions, or another acute hazard, local emergency, housing, public-health, or animal-welfare services may need to be involved in addition to mental-health care.
When should someone seek a professional assessment?
A professional assessment is appropriate when saving, discarding, clutter, intrusive thoughts, rituals, or acquisition are consuming substantial time, causing distress, impairing work or relationships, making rooms unusable, creating safety problems, or generating conflict that the person cannot resolve.
Assessment is especially useful when the person or family cannot tell whether the behavior is driven by attachment to possessions, fear of waste, obsessional harm beliefs, contamination, checking, perfectionism, depression, attention problems, psychosis, or cognitive decline. The purpose of assessment is to identify the mechanism and the full clinical picture, not simply to assign a label.
Frequently asked questions
Is hoarding disorder a type of OCD?
No. Hoarding disorder is a separate diagnosis within the obsessive-compulsive and related disorders family. It was historically conceptualized as part of OCD, but modern diagnostic systems separate it because its core symptoms, beliefs, course, and treatment response are sufficiently distinct.
Can OCD make someone save things?
Yes. Saving can be an OCD compulsion when discarding triggers an obsession, feared consequence, rigid rule, or need for certainty or completeness. In that case, the saving behavior is treated as part of the OCD cycle.
What is the biggest difference between OCD saving and hoarding disorder?
The biggest difference is usually the function of saving. OCD-driven saving is typically performed to neutralize an obsession, prevent a feared event, or satisfy an internal rule. Hoarding disorder centers on persistent difficulty discarding because the possessions feel necessary to save, useful, meaningful, identity-related, or too painful to lose, with resulting accumulation and impairment.
Can someone have both diagnoses?
Yes. A person can independently meet criteria for both OCD and hoarding disorder. Studies suggest OCD occurs in around one fifth of people with hoarding disorder, although estimates vary by sample and method. Worden and Tolin, 2022.
Does a cluttered house mean someone has hoarding disorder?
No. Clutter can result from many causes, including depression, ADHD, physical illness, neurocognitive disorders, psychosis, life circumstances, or OCD-driven avoidance. Hoarding disorder requires a specific pattern of difficulty discarding, perceived need to save, distress, accumulation, and impairment.
Is difficulty throwing away sentimental items a mental disorder?
Not by itself. Saving sentimental possessions is common. It becomes clinically relevant when difficulty discarding is persistent, produces clinically significant distress or impairment, and leads to accumulation that compromises living spaces or important areas of functioning.
Is hoarding disorder treated with ERP?
ERP is central to OCD treatment. Hoarding-specific CBT can include exposure-like practice in discarding and resisting acquisition, but it also targets decision-making, organization, beliefs about possessions, motivation, and clutter. When saving is specifically an OCD compulsion, standard OCD ERP may be directly relevant.
Can a screening test tell whether it is OCD or hoarding disorder?
No single screening tool can make that distinction on its own. OCD measures and hoarding measures quantify symptom patterns and severity, but diagnosis depends on clinical context, function, impairment, alternative explanations, and whether full diagnostic criteria are met.
References
American Psychiatric Association. Hoarding Disorder. Psychiatry.org. https://www.psychiatry.org/patients-families/hoarding-disorder
American Psychiatric Association. Obsessive-Compulsive and Related Disorders. Psychiatry.org. https://www.psychiatry.org/patients-families/obsessive-compulsive-disorder
Bloch, M. H., Bartley, C. A., Zipperer, L., Jakubovski, E., Landeros-Weisenberger, A., Pittenger, C., & Leckman, J. F. (2014). Meta-analysis: hoarding symptoms associated with poor treatment outcome in obsessive-compulsive disorder. Molecular Psychiatry, 19(9), 1025-1030. https://doi.org/10.1038/mp.2014.50
Frost, R. O., Steketee, G., & Grisham, J. (2004). Measurement of compulsive hoarding: Saving Inventory-Revised. Behaviour Research and Therapy, 42(10), 1163-1182. https://doi.org/10.1016/j.brat.2003.07.006
Frost, R. O., Steketee, G., & Tolin, D. F. (2011). Comorbidity in hoarding disorder. Depression and Anxiety, 28(10), 876-884. https://doi.org/10.1002/da.20861
Frost, R. O., Steketee, G., & Tolin, D. F. (2012). Diagnosis and assessment of hoarding disorder. Annual Review of Clinical Psychology, 8, 219-242. https://doi.org/10.1146/annurev-clinpsy-032511-143116
O'Brien, E., & Laws, K. R. (2025). Decluttering minds: Psychological interventions for hoarding disorder - A systematic review and meta-analysis. Journal of Psychiatric Research, 181, 738-751. https://doi.org/10.1016/j.jpsychires.2024.12.029
Pertusa, A., Frost, R. O., & Mataix-Cols, D. (2010). When hoarding is a symptom of OCD: A case series and implications for DSM-V. Behaviour Research and Therapy, 48(10), 1012-1020. https://doi.org/10.1016/j.brat.2010.07.003
Postlethwaite, A., Kellett, S., & Mataix-Cols, D. (2019). Prevalence of hoarding disorder: A systematic review and meta-analysis. Journal of Affective Disorders, 256, 309-316. https://doi.org/10.1016/j.jad.2019.06.004
Tolin, D. F., Frost, R. O., & Steketee, G. (2010). A brief interview for assessing compulsive hoarding: The Hoarding Rating Scale-Interview. Psychiatry Research, 178(1), 147-152. https://doi.org/10.1016/j.psychres.2009.05.001
Tolin, D. F., Worden, B. L., & Levy, H. C. (2025). State of the science: Hoarding disorder and its treatment. Behavior Therapy, 56(4), 667-679. https://doi.org/10.1016/j.beth.2025.03.002
Worden, B. L., & Tolin, D. F. (2022). Co-occurring obsessive-compulsive disorder and hoarding disorder: A review of the current literature. Journal of Cognitive Psychotherapy, 36(4), 271-286. https://doi.org/10.1891/jcp-2021-0010
World Health Organization. International Classification of Diseases (ICD-11). https://www.who.int/news-room/spotlight/international-classification-of-diseases