2026 ICD-10-CM Diagnosis Code F45.9Somatoform disorder, unspecified

ICD-10-CM Codes›F01–F99›F40-F48›F45

ICD-10-CM F45.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F45.9 is a billable ICD-10-CM diagnosis code for somatoform disorder, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as erectile dysfunction due to psychophysiologic disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Somatic disorders.

Code Identity

ICD-10-CM Code
F45.9
Billable Status
Yes — Valid for Submission
Code Describes
Somatoform disorder, unspecified
Short Description
Somatoform disorder, unspecified
Same as the full description in the CMS dataset.
Parent Code
F45
Somatoform disorders

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF40-F48Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
CategoryF45Somatoform disorders
This CodeF45.9Somatoform disorder, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Erectile dysfunction due to psychophysiologic disorder
  • Mental disorder AND/OR culture bound syndrome
  • Psychosomatic factor in physical condition
  • Psychosomatic factor in physical condition, marked psychological component
  • Psychosomatic factor in physical condition, minor psychological component
  • Psychosomatic factor in physical condition, psychological component of unknown degree
  • Somatic syndrome finding
  • Somatic syndrome present

Tabular List NotesGuidance

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

Inclusion Terms

  • Psychosomatic disorder NOS

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)
      • psychogenic NOS
    • Disorder(of)
      • somatoform
    • Disturbance(s)
      • psychogenic

Clinical ClassificationClinical

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

CCSR MBD011
Somatic disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Somatoform Disorder

    a category of psychiatric disorders which are characterized by the presence of physical symptoms that suggest a medical condition but are not fully explained by any known medical reasons.

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 F45.9 to ICD-9-CMHistory

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

ICD-9-CM
300.82 Undiff somatoform disrdr
Approximate The match is approximate rather than exact.
ICD-9-CM
306.9 Psychogenic disorder NOS
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 F45.9Overview

Is F45.9 (Somatoform disorders) a billable code?

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

What is the ICD-9 equivalent of F45.9?

Under the General Equivalence Mappings, somatoform disorder, unspecified converts to ICD-9-CM 300.82 (undiff somatoform disrdr) and 306.9 (psychogenic disorder NOS). 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.