ICD-9-CM diagnosis code (retired)
778.4 — Other disturbances of temperature regulation of newborn
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 778.4
778.4 is an ICD-9-CM diagnosis code for other disturbances of temperature regulation of newborn. 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 P81.0 (Environmental hyperthermia of newborn), P81.8 (Other specified disturbances of temperature regulation of newborn) and P81.9 (Disturbance of temperature regulation of newborn, unspecified). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 778.4
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.