2026 ICD-10-CM Diagnosis Code F06.4Anxiety disorder due to known physiological condition

ICD-10-CM Codes›F01–F99›F01-F09›F06

ICD-10-CM F06.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F06.4 is a billable ICD-10-CM diagnosis code for anxiety disorder due to known physiological condition. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as anxiety disorder due to a general medical condition. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Anxiety and fear-related disorders.

Code Identity

ICD-10-CM Code
F06.4
Billable Status
Yes — Valid for Submission
Code Describes
Anxiety disorder due to known physiological condition
Short Description
Anxiety disorder due to known physiological condition
Same as the full description in the CMS dataset.
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 CodeF06.4Anxiety disorder due to known physiological condition

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anxiety disorder due to a general medical condition
  • Organic anxiety disorder

Tabular List NotesGuidance

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

Type 2 Excludes

  • anxiety disorders due to alcohol and other psychoactive substances F10 F19
  • anxiety disorders, not due to known physiological condition or unspecified F40 F41

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)
      • anxiety
        • due to (secondary to)
          • general medical condition
    • Disorder(of)
      • anxiety
        • organic
    • Disorder(of)
      • organic
        • anxiety

Clinical ClassificationClinical

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

CCSR MBD005
Anxiety and fear-related disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Anxiety Disorder Due to a General Medical Condition

    an anxiety disorder in which the symptoms of anxiety have been determined to be the direct physiological consequence of a general medical condition.

  • Organic Anxiety Disorder

    an anxiety disorder whose cause is not attributable to a psychiatric illness but to an underlying physical condition.

Patient EducationClinical

Anxiety

Anxiety is a feeling of fear, dread, and uneasiness. It might cause you to sweat, feel restless and tense, and have a rapid heartbeat. It can be a normal reaction to stress. For example, you might feel anxious when faced with a difficult problem at work, before taking a test, or before making an important decision.

The full article covers:

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

Read the full article at MedlinePlus

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

Convert F06.4 to ICD-9-CMHistory

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

ICD-9-CM
293.84 Anxiety disorder oth dis
Exact Match The mapping is direct, with no qualifiers.

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 F06.4Overview

Is F06.4 (Other mental disorders due to known physiological condition) a billable code?

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

What is the ICD-9 equivalent of F06.4?

Under the General Equivalence Mappings, anxiety disorder due to known physiological condition converts to ICD-9-CM 293.84 (anxiety disorder oth dis). The mapping is a direct match.

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.