ICD-9-CM diagnosis code (retired)
344.42 — Monoplegia of upper limb affecting nondominant sde
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 344.42
344.42 is an ICD-9-CM diagnosis code for monoplegia of upper limb affecting nondominant sde. 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 2 ICD-10-CM codes, such as G83.23 (Monoplegia of upper limb affecting right nondominant side) and G83.24 (Monoplegia of upper limb affecting left nondominant side). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 344.42
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.