2026 ICD-10-CM Diagnosis Code F06.31Mood disorder due to known physiological condition with depressive features

ICD-10-CM Codes›F01–F99›F01-F09›F06

ICD-10-CM F06.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F06.31 is a billable ICD-10-CM diagnosis code for mood disorder due to known physiological condition with depressive features. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as mood disorder due to a general medical condition. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Depressive disorders.

Code Identity

ICD-10-CM Code
F06.31
Billable Status
Yes — Valid for Submission
Code Describes
Mood disorder due to known physiological condition with depressive features
Short Description
Mood disorder due to known physiol cond w depressv features
Parent Code
F06.3
Mood disorder due to known physiological condition

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF01-F09Mental disorders due to known physiological conditions
CategoryF06Other mental disorders due to known physiological condition
This CodeF06.31Mood disorder due to known physiological condition with depressive features

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Mood disorder due to a general medical condition
  • Mood disorder with depressive features due to general medical condition
  • Organic mood disorder of depressed type

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Depressive disorder due to known physiological condition, with depressive features

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
        • due to known physiological condition
          • with
            • depressive features
    • Disorder(of)
      • depressive
        • organic
    • Disorder(of)
      • mood
        • due to (secondary to)
          • physiological condition
            • with
              • depressive features
    • State(of)
      • psychotic, organic
        • transient NEC
          • with
            • depression
    • State(of)
      • transient organic psychotic NEC
        • depressive type
    • Syndrome
      • organic
        • depressive
    • Syndrome
      • psycho-organic (nonpsychotic severity)
        • depressive type

Clinical ClassificationClinical

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

CCSR MBD002
Depressive disorders
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 F06.31 to ICD-9-CMHistory

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

ICD-9-CM
293.83 Mood disorder other dis
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 F06.31Overview

Is F06.31 (Mood disorder due to known physiological condition) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report mood disorder due to known physiological condition with depressive features on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of F06.31?

Under the General Equivalence Mappings, mood disorder due to known physiological condition with depressive features converts to ICD-9-CM 293.83 (mood disorder other dis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.