ICD-9-CM diagnosis code (retired)
783.42 — Delayed milestones
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 783.42
783.42 is an ICD-9-CM diagnosis code for delayed milestones. 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, R62.0 (Delayed milestone in childhood). The match is exact.
ICD-10-CM equivalents
- R62.0Delayed milestone in childhoodexact match
Common questions about 783.42
What is the ICD-10 code for ICD-9 783.42?
- The GEMs map 783.42 to ICD-10-CM R62.0.
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.