ICD-10-CM 2027 diagnosis code
F42.8Other obsessive-compulsive disorder
F42.8 is a valid, billable ICD-10-CM code for other obsessive-compulsive disorder. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Swearing, ICD-10 code for Obsession, ICD-10 code for Obsessive-compulsive neurosis or reaction.
Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About F42.8
F42.8 is the ICD-10-CM diagnosis code for other obsessive-compulsive disorder. It belongs to category F42 (obsessive-compulsive disorder), block F40-F48 (anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within F42, choose F42.8 (Other obsessive-compulsive disorder) only when documentation doesn't support a more specific option: mixed obsessional thoughts and acts (F42.2), Hoarding disorder (F42.3), Excoriation (skin-picking) disorder (F42.4) and unspecified (F42.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 882 (Neuroses Except Depressive, relative weight 0.9952), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It was added in FY2017, effective October 1, 2016.
Before ICD-10, this condition was coded in ICD-9-CM as 300.3 (obsessive-compulsive disorders).
Coding notes
- Anancastic neurosis
- Obsessive-compulsive neurosis
Notes that apply from higher levels
Instructions written at a parent level also apply to F42.8.
Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
Alphabetic index entries
21 entriesTerms in the official ICD-10-CM index that lead to F42.8.
- Compulsion, compulsive › neurosis
- Compulsion, compulsive › states
- Compulsion, compulsive › swearing
- Disorder (of) › psychogenic NOS › compulsive
- Disorder (of) › psychogenic NOS › obsessive
- Neurosis, neurotic › anankastic
- Neurosis, neurotic › compulsive, compulsion
- Neurosis, neurotic › obsessional
- Neurosis, neurotic › obsessive-compulsive
- Obsession, obsessional state
- Obsessive-compulsive neurosis or reaction
- Reaction › compulsive
- Reaction › obsessive-compulsive
- Reaction › psychoneurotic › compulsive
- Reaction › psychoneurotic › obsessive
- Rumination › neurotic
- Rumination › obsessional
- Rumination › psychogenic
- State (of) › compulsive
- State (of) › obsessional
- Swearing, compulsive
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 19 · Mental Diseases and Disorders
ICD-9-CM equivalent
Converter →- 300.3Obsessive-compulsive disordersapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2017 (effective 10/1/2016): Added
- No changes since FY2017.
Common questions about F42.8
Is F42.8 billable?
- Yes. F42.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F42.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F42.8 as a principal diagnosis.
Is F42.8 a CC or MCC?
- No. F42.8 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does F42.8 group to?
- F42.8 is used in the MS-DRG v44.0 logic for MS-DRG 882 (Neuroses Except Depressive). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for F42.8?
- The CMS General Equivalence Mappings map F42.8 to ICD-9-CM 300.3.