2026 ICD-10-CM Diagnosis Code F42Obsessive-compulsive disorder

ICD-10-CM Codes›F01–F99›F40-F48›F42

ICD-10-CM F42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F42 is a non-billable ICD-10-CM category code for obsessive-compulsive disorder, so it cannot be submitted on claims. Use a more specific code from this category instead, such as F42.2, F42.3, F42.4, and F42.8. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Obsessive-compulsive and related disorders.

Code Identity

ICD-10-CM Code
F42
Billable Status
No — Non-Billable Category
Code Describes
Obsessive-compulsive disorder
Short Description
Obsessive-compulsive disorder
Same as the full description in the CMS dataset.
Chapter
F40-F48
Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF40-F48Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
CategoryF42Obsessive-compulsive disorder
This CodeF42Obsessive-compulsive disorder

Specific Coding for Obsessive-compulsive disorderOverview

Non-specific codes like F42 require more characters. Use one of these billable codes instead:

  • Use F42.2 for Mixed obsessional thoughts and acts

  • Use F42.3 for Hoarding disorder

  • Use F42.4 for Excoriation (skin-picking) disorder

  • Use F42.8 for Other obsessive-compulsive disorder

  • Use F42.9 for Obsessive-compulsive disorder, unspecified

Tabular List NotesGuidance

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

Type 2 Excludes

  • obsessive-compulsive personality disorder F60.5
  • obsessive-compulsive symptoms occurring in depression F32 F33
  • obsessive-compulsive symptoms occurring in schizophrenia F20

Clinical ClassificationClinical

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

CCSR MBD006
Obsessive-compulsive and related disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Obsessive-Compulsive Disorder

Obsessive-compulsive disorder (OCD) is a mental disorder in which you have thoughts (obsessions) and rituals (compulsions) over and over. They interfere with your life, but you cannot control or stop them.

The full article covers:

  • What is obsessive-compulsive disorder (OCD)?
  • What causes obsessive-compulsive disorder (OCD)?
  • Who is at risk for obsessive-compulsive disorder (OCD)?
  • What are the symptoms of obsessive-compulsive disorder (OCD)?
  • How is obsessive-compulsive disorder (OCD) diagnosed?
  • What are the treatments for obsessive-compulsive disorder (OCD)?

Read the full article at MedlinePlus

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

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 F42Overview

Is F42 (Obsessive-compulsive disorder) a billable code?

No. This is a category header that groups the codes for obsessive-compulsive disorder, and headers cannot be submitted on claims. Claims for obsessive-compulsive disorder need a more specific code from this category, such as F42.2, F42.3, and F42.4.

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.