When did hoarding become its own diagnosis?

DSM-5 made hoarding disorder a separate diagnosis in 2013. Before that, DSM-IV-TR listed hoarding as a criterion for obsessive-compulsive personality disorder and told clinicians to consider OCD when hoarding was extreme.

Can a person have both hoarding disorder and OCD?

Yes. In a study of 217 people with hoarding disorder, 18% also met criteria for OCD. The rate was 28% in men and 15% in women. That is well above the 1% to 2% rate of OCD in the general population.

How many people have hoarding disorder?

A 2019 meta-analysis of 11 studies and 53,378 adults estimated the prevalence at 2.5%. Rates were similar in men and women.

Do SSRIs help hoarding disorder?

The evidence is limited. A 2015 meta-analysis found seven studies with 92 participants, and about 58% responded to medication. Most participants had an OCD diagnosis, so the result may not apply to hoarding disorder alone. A prescriber should guide any medication decision.

Is collecting the same as hoarding?

No. In the London field trial for the DSM-5 criteria, none of the 20 self-defined collectors met criteria for hoarding disorder. The diagnosis requires difficulty discarding, distress, and clutter that stops living areas from being used.

Is Hoarding Disorder a Type of OCD?

The short answer: No. Since 2013, hoarding disorder has been its own diagnosis in DSM-5, listed in the same chapter as OCD but separate from it. Before that, doctors treated hoarding as a symptom of OCD or of obsessive-compulsive personality disorder. In one study of 217 people with hoarding disorder, only 18% also had OCD. Hoarding can still be a symptom of OCD in a minority of cases.

How did the classification of hoarding change?

For decades, hoarding had no diagnosis of its own. A 2010 review written for the DSM-5 process describes the old rules. DSM-IV-TR listed hoarding as one of the criteria for obsessive-compulsive personality disorder (OCPD). When hoarding was extreme, the manual told clinicians to consider a diagnosis of OCD.

The same review found that hoarding is often independent of both OCD and OCPD. Its authors concluded there was enough evidence to create a new disorder, which they provisionally called hoarding disorder. They suggested listing it as an obsessive-compulsive spectrum disorder because of the historical link.

DSM-5 adopted that plan in 2013. Hoarding disorder is now a distinct diagnosis in the obsessive-compulsive and related disorders chapter. A 2014 meta-analysis in Molecular Psychiatry summarizes the three core features:

Persistent difficulty discarding or parting with possessions, regardless of their actual value.
A perceived need to save items, and distress when discarding them.
Possessions that pile up, clutter living areas, and stop rooms from being used as intended.

The World Health Organization moved the same way. The ICD-11 working group proposed an obsessive-compulsive and related disorders grouping that includes OCD, body dysmorphic disorder, hypochondriasis, olfactory reference disorder, and hoarding disorder. A companion paper from that working group argued that hoarding has its own core symptoms, brain correlates, and treatment responses.

So hoarding disorder is a relative of OCD, not a subtype. The common types of OCD are themes inside one diagnosis. Hoarding disorder is a different diagnosis. Our guide to OCD versus OCPD covers the personality disorder that hoarding was once tied to.

How common is hoarding disorder, and how often does OCD come with it?

Hoarding disorder is common. A 2019 meta-analysis of 11 studies and 53,378 adults put the pooled prevalence at 2.5% (95% CI 1.7% to 3.6%). Rates were similar in men and women. Earlier estimates ranged from 1.5% to 6%.

Most people with hoarding disorder do not have OCD. The largest comorbidity study, published in Depression and Anxiety in 2011, compared 217 people with hoarding disorder with 96 people who had OCD without hoarding. The findings:

39 of the 217 people with hoarding disorder (18%) also met criteria for OCD.
The rate was 28% in men and 15% in women.
Major depressive disorder was the most frequent companion, and it was more common than in the OCD group.
Inattentive ADHD was diagnosed in 28% of the hoarding group, compared with 3% of the OCD group.
Compulsive buying, kleptomania, and acquiring free things were also more common in hoarding disorder.

The authors add a caution. An 18% rate of OCD is far above the 1% to 2% seen in the general population. Hoarding disorder is distinct from OCD, but the two are still related. Because depression is so frequent in hoarding disorder, depression.md is a useful companion resource.

How does hoarding disorder differ from OCD?

The differences show up in how the thoughts feel, how much distress the person reports, and how much insight they have.

The thoughts feel different. OCD involves obsessions. MedlinePlus defines these as repeated thoughts, urges, or mental images that cause anxiety. Hoarding thoughts are not like that. The 2014 meta-analysis notes that they are not generally experienced as unsettling or intrusive. They feel like a normal stream of thought.

The distress pattern is different. In a study of 162 patients, the group with hoarding alone reported significantly less anxiety, worry, stress, and negative affect than the groups with OCD. In hoarding disorder, the distress arrives when the person has to discard something. Many people are bothered more by the clutter than by the saving that produced it.

Insight is often lower. People with OCD typically have some insight into their condition. People with hoarding symptoms frequently do not, according to the same meta-analysis. The ICD-11 working group suggested poor insight as a specifier for hoarding disorder. This is one reason family members, not the person affected, often ask for help first.

The reasons for saving are different. Most people who hoard keep ordinary items because of their emotional or intrinsic value. That finding comes from a 2008 study in the American Journal of Psychiatry, described in the next section.

Can hoarding still be a symptom of OCD?

Yes, in a minority of cases. The 2008 study compared 25 people who had severe hoarding with OCD and 27 who had severe hoarding without OCD. In most people in both groups, the hoarding looked the same.

About one-fourth of the group with OCD showed a different picture. Their hoarding was driven by typical OCD processes:

Fear of catastrophic consequences if an item was thrown away.
Checking rituals before discarding.
Mental compulsions that had to be completed before any item could go.
Hoarding of bizarre items.

These patients had a more severe and disabling form of the problem. The authors concluded that hoarding is a separate syndrome in most people, and a symptom of OCD in others. The practical question for a clinician is why the person saves. If the saving answers an obsession, the diagnosis is OCD. If the person saves because the items feel valuable or needed, the diagnosis is hoarding disorder.

Does OCD treatment work for hoarding?

Standard OCD treatment works less well when hoarding is present. The 2014 meta-analysis pooled 21 studies and 3,039 people with OCD, 304 of them with hoarding symptoms. Those with hoarding symptoms had half the odds of responding to traditional OCD treatments (odds ratio 0.50, 95% CI 0.42 to 0.60). The result was the same for medication, behavioral therapy, and the two combined.

This matters for anyone who has tried ERP therapy for OCD without progress on their clutter. The authors concluded that these patients may benefit more from treatment that targets hoarding directly.

What treatment works for hoarding disorder?

Cognitive behavioral therapy (CBT) built for hoarding has the most evidence. It differs from ERP. The outcomes that trials measure are difficulty discarding, clutter, and acquiring.

A 2015 meta-analysis of 12 samples and 232 patients found a large drop in hoarding severity after CBT. The strongest effect was on difficulty discarding. More CBT sessions and more home visits were linked with better outcomes. The limit is clear too: only 24% to 43% of patients reached clinically significant change. Most stayed closer to the hoarding range than the normal range.

Later reviews agree. A 2021 update covering 16 studies and 505 patients found a large effect that held at follow-up, but noted a lack of controlled trials. A 2025 meta-analysis of 41 studies and 1,343 people included 8 randomized trials. Psychological therapy beat control conditions, and CBT was not superior to other psychological approaches. Symptoms often stayed above the clinical cut-off.

Medication evidence is thin. A 2015 meta-analysis found only seven studies and 92 participants, most of whom had an OCD diagnosis. About 58% responded to drug treatment, mainly serotonin reuptake inhibitors. The authors called for trials in hoarding disorder itself. Medication decisions belong with a prescriber who knows the full history.

The bottom line

Hoarding disorder is not a type of OCD. It has been a separate diagnosis since DSM-5 in 2013, and it sits in the same family of conditions. About 2.5% of adults meet criteria for it, and fewer than 1 in 5 of them also have OCD. Hoarding can be an OCD symptom when obsessions and rituals drive the saving. The distinction changes treatment, because standard OCD treatment works about half as well when hoarding is present. CBT designed for hoarding helps, but full remission is uncommon. A clinician who knows both conditions can sort out which one applies.

Last updated: October 2026. This article is for informational purposes only and does not constitute medical advice. If clutter or difficulty discarding is affecting your safety or daily life, speak with a licensed mental health professional.