ICD-9-CM diagnosis code (retired)
426.11 — First degree atrioventricular block
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 426.11
426.11 is an ICD-9-CM diagnosis code for first degree atrioventricular block. 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, I44.0 (Atrioventricular block, first degree). The match is exact.
ICD-10-CM equivalents
- I44.0Atrioventricular block, first degreeexact match
Common questions about 426.11
What is the ICD-10 code for ICD-9 426.11?
- The GEMs map 426.11 to ICD-10-CM I44.0.
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.