F42.9 — Obsessive-compulsive disorder, unspecified
Is F42.9 billable?
Yes, but F42.9 is an unspecified code. F42.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F42.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting F42.9 — the more specific alternatives are listed below.
F42.9 at a glance
| Code | F42.9 |
|---|---|
| Description | Obsessive-compulsive disorder, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F42.9 group to?
F42.9 sits in MDC 19 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 882Neuroses Except Depressivemedical
How is F42.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F42.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Disorder › obsessive-compulsive (of)
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F42.9, but a patient may have both at the same time. When documentation supports it, F42.9 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Excludes2 — not included here — inherited from F42
The conditions below are not part of F42.9, but a patient may have both at the same time. When documentation supports it, F42.9 and the excluded code may both be reported.
How long has F42.9 existed?
F42.9 first appears in FY2018 (FY2017 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.