2026 ICD-10-CM Diagnosis Code F33.40Major depressive disorder, recurrent, in remission, unspecified

ICD-10-CM Codes›F01–F99›F30-F39›F33

ICD-10-CM F33.40
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F33.40 is a billable ICD-10-CM diagnosis code for major depressive disorder, recurrent, in remission, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as major depression in remission. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Mental and substance use disorders in remission.

Code Identity

ICD-10-CM Code
F33.40
Billable Status
Yes — Valid for Submission
Code Describes
Major depressive disorder, recurrent, in remission, unspecified
Short Description
Major depressive disorder, recurrent, in remission, unsp
Parent Code
F33.4
Major depressive disorder, recurrent, in remission

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF30-F39Mood [affective] disorders
CategoryF33Major depressive disorder, recurrent
This CodeF33.40Major depressive disorder, recurrent, in remission, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Major depression in remission
  • Recurrent major depression in remission

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disorder(of)
      • depressive
        • recurrent
          • in remission

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD026
Mental and substance use disorders in remission
Default principal diagnosis: inpatient Yes · outpatient Yes

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 F33.40 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
296.30 Recurr depr psychos-unsp
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F33.40Overview

Is F33.40 (Major depressive disorder, recurrent, in remission) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report major depressive disorder, recurrent, in remission, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of F33.40?

Under the General Equivalence Mappings, major depressive disorder, recurrent, in remission, unspecified converts to ICD-9-CM 296.30 (recurr depr psychos-unsp). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.