2026 ICD-10-CM Diagnosis Code F33.9Major depressive disorder, recurrent, unspecified
ICD-10-CM Codes›F01–F99›F30-F39›F33
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
F33.9 is a billable ICD-10-CM diagnosis code for major depressive disorder, recurrent, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 885. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 12 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Depressive disorders.
F33.9 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 59 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 58, ESRD (V21) category 58, ESRD (V24) category 59, and RxHCC Part D (V08) category 132 for payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F33.9 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Chronic depression
- Chronic recurrent major depressive disorder
- Minimal major depression
- Minimal recurrent major depression
- Moderately severe recurrent major depression
- Postpartum depression
- Recurrent major depression
- Recurrent major depressive disorder with melancholic features
- Recurrent major depressive disorder with postpartum onset
- Recurrent major depressive episodes
- Seasonal affective disorder
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Monopolar depression NOS
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
recurrent F33.9
Involution, involutional See Also: condition;
recurrent F33.9
Reaction See Also: Disorder;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Seasonal Affective Disorder
a syndrome characterized by depressions that recur annually at the same time each year, usually during the winter months. other symptoms include anxiety, irritability, decreased energy, increased appetite (carbohydrate cravings), increased duration of sleep, and weight gain. sad (seasonal affective disorder) can be treated by daily exposure to bright artificial lights (phototherapy), during the season of recurrence.
Patient EducationClinical
Depression
Depression is more than a feeling of being sad or irritable for a few days. It's a serious mood disorder. As one of the most common mental disorders in the United States, depression can affect how you think, feel, and your everyday life.
The full article covers:
- What is depression?
- What are the different types of depression?
- What causes depression?
- Who is at risk of depression?
- What are the symptoms of depression?
- How is depression diagnosed?
- What are the treatments for depression?
- Can depression be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F33.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F33.9Overview
What is the ICD-10 code for major depressive disorder, recurrent, unspecified?
The ICD-10-CM code for major depressive disorder, recurrent, unspecified is F33.9 (sometimes written as F339). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is F33.9 (Major depressive disorder, recurrent) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report major depressive disorder, recurrent, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does F33.9 group to?
When major depressive disorder, recurrent, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 885 (psychoses), which carries a relative weight of 1.3968. Higher weights mean higher Medicare reimbursement.
Is F33.9 a CC or MCC?
CMS lists F33.9 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 12 closely related codes in its exclusion list.
What is the ICD-9 equivalent of F33.9?
Under the General Equivalence Mappings, major depressive disorder, recurrent, unspecified converts to ICD-9-CM 296.30 (recurr depr psychos-unsp). The mapping is approximate, so confirm the match fits the documentation.
Does F33.9 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. F33.9 mapped to HCC 59 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 58 (Major Depressive/Bipolar/and Paranoid Disorders), ESRD (V21) category 58 (Major Depressive/Bipolar/and Paranoid Disorders), ESRD (V24) category 59 (Major Depressive/Bipolar/and Paranoid Disorders), and RxHCC Part D (V08) category 132 (Depression).
