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ICD-10-CM 2027 diagnosis code

F42.2Mixed obsessional thoughts and acts

✓ Billable / specific

F42.2 is a valid, billable ICD-10-CM code for mixed obsessional thoughts and acts. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 F42.2

F42.2 is the ICD-10-CM diagnosis code for mixed obsessional thoughts and acts. 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 (obsessive-compulsive disorder), F42.2 is specifically for mixed obsessional thoughts and acts. Related codes cover Hoarding disorder (F42.3), Excoriation (skin-picking) disorder (F42.4), other obsessive-compulsive disorder (F42.8) 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).

Notes that apply from higher levels

Instructions written at a parent level also apply to F42.2.

› From F42 Obsessive-compulsive disorder
Excludes2
  • obsessive-compulsive personality (disorder) (F60.5)
  • obsessive-compulsive symptoms occurring in depression (F32.-, F33.-)
  • obsessive-compulsive symptoms occurring in schizophrenia (F20.-)

Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to F42.2.

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

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about F42.2

Is F42.2 billable?

Yes. F42.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F42.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F42.2 as a principal diagnosis.

Is F42.2 a CC or MCC?

No. F42.2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F42.2 group to?

F42.2 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 F42.2?

The CMS General Equivalence Mappings map F42.2 to ICD-9-CM 300.3.