2026 ICD-10-CM Diagnosis Code F06.8Other specified mental disorders due to known physiological condition

ICD-10-CM Codes›F01–F99›F01-F09›F06

ICD-10-CM F06.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F06.8 is a billable ICD-10-CM diagnosis code for other specified mental disorders due to known physiological condition. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Miscellaneous mental and behavioral disorders/conditions.

Code Identity

ICD-10-CM Code
F06.8
Billable Status
Yes — Valid for Submission
Code Describes
Other specified mental disorders due to known physiological condition
Short Description
Oth mental disorders due to known physiological condition
Parent Code
F06
Other mental disorders 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 CodeF06.8Other specified mental disorders due to known physiological condition

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cerebral degeneration due to Parkinson's disease
  • Dysexecutive syndrome
  • Epileptic psychosis
  • Memory disorder co-occurrent and due to organic brain damage
  • Organic dissociative disorder
  • Organic emotionally labile disorder
  • Organic memory impairment
  • Organic psychotic condition
  • Paranoid-hallucinatory epileptic psychosis
  • Parkinson's disease
  • Psychosis co-occurrent and due to Parkinson's disease

Tabular List NotesGuidance

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

Inclusion Terms

  • Epileptic psychosis NOS
  • Obsessive-compulsive and related disorder due to a known physiological condition
  • Organic dissociative disorder
  • Organic emotionally labile asthenic disorder

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.

    • Deterioration
      • epileptic
    • Disorder(of)
      • dissociative
        • due to (secondary to) general medical condition
    • Disorder(of)
      • dissociative
        • organic
    • Disorder(of)
      • obsessive-compulsive
        • and related disorder due to a known physiological condition
    • Disorder(of)
      • organic
        • dissociative
    • Disorder(of)
      • organic
        • emotionally labile (asthenic)
    • Disturbance(s)
      • memory
        • mild, following organic brain damage
    • Epilepsy, epileptic, epilepsia(attack) (cerebral) (convulsion) (fit) (seizure)
      • deterioration (mental)
    • Episode
      • psychotic
        • organic
    • Lack of
      • memory
        • mild, following organic brain damage
    • Loss(of)
      • memory
        • mild, following organic brain damage
    • Memory disturbance, lack or loss
      • mild, following organic brain damage
    • Psychosis, psychotic
      • due to or associated with
        • epilepsy
    • Psychosis, psychotic
      • due to or associated with
        • Huntington's chorea
    • Psychosis, psychotic
      • due to or associated with
        • ischemia, cerebrovascular (generalized)
    • Psychosis, psychotic
      • due to or associated with
        • multiple sclerosis
    • Psychosis, psychotic
      • due to or associated with
        • physical disease
    • Psychosis, psychotic
      • epileptic
    • Psychosis, psychotic
      • episode
        • due to or associated with physical condition
    • Psychosis, psychotic
      • organic
        • due to or associated with
          • disease
            • endocrine or metabolic
    • Psychosis, psychotic
      • organic
        • due to or associated with
          • infection
            • brain (intracranial)
    • Psychosis, psychotic
      • organic
        • due to or associated with
          • trauma, brain (birth) (from electric current) (surgical)
    • Psychosis, psychotic
      • organic
        • infective
    • Psychosis, psychotic
      • organic
        • post-traumatic
    • Psychotic episode due to or associated with physical condition
    • State(of)
      • affective and paranoid, mixed, organic psychotic
    • State(of)
      • psychotic, organic
        • mixed paranoid and affective
    • State(of)
      • psychotic, organic
        • transient NEC
    • State(of)
      • transient organic psychotic NEC
    • Syndrome
      • brain (nonpsychotic)
        • psychotic

Clinical ClassificationClinical

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

CCSR MBD013
Miscellaneous mental and behavioral disorders/conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Mental Disorders

Mental disorders (or mental illnesses) are conditions that affect your thinking, feeling, mood, and behavior. They may happen over a short period of time or come and go. Some can be chronic (long-lasting). They can affect your ability to relate to others and function each day..

The full article covers:

  • What are mental disorders?
  • What are some types of mental disorders?
  • What causes mental disorders?
  • Who is at risk for mental disorders?
  • How are mental disorders diagnosed?
  • What are the treatments for mental disorders?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F06.8 to ICD-9-CMHistory

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

ICD-9-CM
294.8 Mental disor NEC oth 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 F06.8Overview

Is F06.8 (Other mental disorders due to known physiological condition) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified mental disorders due to known physiological condition on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does F06.8 group to?

When other specified mental disorders due to known physiological condition is the principal diagnosis on an inpatient stay, it groups to MS-DRG 974, 975, 976, with relative weights from 0.8945 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F06.8?

Under the General Equivalence Mappings, other specified mental disorders due to known physiological condition converts to ICD-9-CM 294.8 (mental disor NEC oth 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.