F33.9 Major depressive disorder, recurrent, unspecified
The ICD-10-CM code for Major depressive disorder, recurrent, unspecified is F33.9 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- F30-F39: Mood [affective] disorders (F30-F39)
- Category F33
- 11 codes (9 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to F33.9:
- Melancholia › recurrent
- Depression (acute) (mental) › monopolar
- Involution, involutional › depression (single episode) › recurrent episode
- Episode › depressive › recurrent
- Disorder (of) › depressive › recurrent
- Disorder (of) › depressive › major › recurrent
- Menopause, menopausal (asymptomatic) (state) › depression (single episode) › psychotic (single episode) › recurrent episode
- Menopause, menopausal (asymptomatic) (state) › depression (single episode) › agitated (single episode) › recurrent episode
Inclusion Terms
- Monopolar depression NOS
U.S. Hospital Utilization
- An estimated 129,970 U.S. inpatient stays in 2023 included F33.9 among the documented diagnoses.
- 20,665 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Prevalence & Statistics
- In 2021, an estimated 21.0 million U.S. adults (8.3% of all U.S. adults) had at least one major depressive episode in the past year, according to NIMH analysis of the 2021 National Survey on Drug Use and Health. (NIMH — Major Depression statistics, 2021)
Official Coding Guidelines
Pain disorders related to psychological factors (TOC entry)a. Pain disorders related to psychological factors ..................................................................... 43
Psychoactive substance use disorders (TOC entry)b. Mental and behavioral disorders due to psychoactive substance use ................................... 43
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026