ICD-9-CM diagnosis code (retired)
758.9 — Conditions due to anomaly of unspecified chromosome
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 758.9
758.9 is an ICD-9-CM diagnosis code for conditions due to anomaly of unspecified chromosome. 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, Q99.9 (Chromosomal abnormality, unspecified). The match is exact.
ICD-10-CM equivalents
- Q99.9Chromosomal abnormality, unspecifiedexact match
Common questions about 758.9
What is the ICD-10 code for ICD-9 758.9?
- The GEMs map 758.9 to ICD-10-CM Q99.9.
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.