ICD-9-CM diagnosis code (retired)
424.1 — Aortic valve disorders
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 424.1
424.1 is an ICD-9-CM diagnosis code for aortic valve disorders. 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 5 ICD-10-CM codes, such as I35.0 (Nonrheumatic aortic (valve) stenosis), I35.1 (Nonrheumatic aortic (valve) insufficiency) and I35.2 (Nonrheumatic aortic (valve) stenosis with insufficiency). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- I35.0Nonrheumatic aortic (valve) stenosisapproximate
- I35.1Nonrheumatic aortic (valve) insufficiencyapproximate
- I35.2Nonrheumatic aortic (valve) stenosis with insufficiencyapproximate
- I35.8Other nonrheumatic aortic valve disordersapproximate
- I35.9Nonrheumatic aortic valve disorder, unspecifiedapproximate
Common questions about 424.1
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.