ICD-9-CM diagnosis code (retired)
270.4 — Disturbances of sulphur-bearing amino-acid metabolism
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 270.4
270.4 is an ICD-9-CM diagnosis code for disturbances of sulphur-bearing amino-acid metabolism. 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 3 ICD-10-CM codes, such as E72.10 (Disorders of sulfur-bearing amino-acid metabolism, unspecified), E72.11 (Homocystinuria) and E72.19 (Other disorders of sulfur-bearing amino-acid metabolism). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 270.4
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.