ICD-10-CM 2027
ICD-10 code for nervous depression
From the official ICD-10-CM alphabetic index entry “Depression (acute) (mental) › nervous”. Page updated September 29, 2026.
About coding nervous depression
The ICD-10-CM code for nervous depression is F34.1 (Dysthymic disorder).
Within F34 (persistent mood [affective] disorders), F34.1 is specifically for Dysthymic disorder. Related codes cover Cyclothymic disorder (F34.0), other persistent mood [affective] disorders (F34.8) and persistent mood [affective] disorder, unspecified (F34.9).
The conditions in its Excludes2 note aren't part of F34.1, but may be coded alongside it if the patient has both: anxiety depression (mild or not persistent) (F41.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about nervous depression ICD-10 codes
What is the ICD-10 code for nervous depression?
- F34.1 — Dysthymic disorder.
Is F34.1 billable?
- Yes. F34.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F34.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F34.1 as a principal diagnosis.
Is F34.1 a CC or MCC?
- No. F34.1 is neither a CC nor an MCC under MS-DRG v44.0.