ICD-9-CM diagnosis code (retired)
773.3 — Hydrops fetalis due to isoimmunization
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 773.3
773.3 is an ICD-9-CM diagnosis code for hydrops fetalis due to isoimmunization. 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, P56.0 (Hydrops fetalis due to isoimmunization). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- P56.0Hydrops fetalis due to isoimmunizationapproximate
Common questions about 773.3
What is the ICD-10 code for ICD-9 773.3?
- The GEMs map 773.3 to ICD-10-CM P56.0.
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.