ICD-9-CM diagnosis code (retired)
309.0 — Adjustment disorder with depressed mood
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 309.0
309.0 is an ICD-9-CM diagnosis code for adjustment disorder with depressed mood. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, F43.21 (Adjustment disorder with depressed mood). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- F43.21Adjustment disorder with depressed moodapproximate
Common questions about 309.0
What is the ICD-10 code for ICD-9 309.0?
- The GEMs map 309.0 to ICD-10-CM F43.21.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.