Is F42.9 a billable ICD-10 code?

Yes. F42.9 (Obsessive-compulsive disorder, unspecified) is billable and can be used for insurance claims. Always verify payer-specific requirements.

F42.9 ✓ Billable

Obsessive-compulsive disorder, unspecified

Q: What is ICD-10 code F42.9?

ICD-10-CM code F42.9 stands for "Obsessive-compulsive disorder, unspecified". It is a billable code in the Mental, Behavioral and Neurodevelopmental Disorders chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Mental, Behavioral and Neurodevelopmental Disorders

Code

F42.9

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Mental, Behavioral and Neurodevelopmental Disorders

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code F42.9?

ICD-10-CM code F42.9 represents Obsessive-compulsive disorder, unspecified. It is a billable diagnosis code in the Mental, Behavioral and Neurodevelopmental Disorders chapter, effective October 1, 2025 – September 30, 2026.

Is F42.9 billable?

Yes. F42.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is F42.9 in?

F42.9 belongs to the Mental, Behavioral and Neurodevelopmental Disorders chapter (F01–F99) of ICD-10-CM.

Related codes in the F42 category

F42 Obsessive-compulsive disorder Non-billable F42.2 Mixed obsessional thoughts and acts Billable F42.3 Hoarding disorder Billable F42.4 Excoriation (skin-picking) disorder Billable F42.8 Other obsessive-compulsive disorder Billable

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