ICD-9-CM diagnosis code (retired)
451.81 — Phlebitis and thrombophlebitis of iliac vein
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 451.81
451.81 is an ICD-9-CM diagnosis code for phlebitis and thrombophlebitis of iliac vein. 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, I80.219 (Phlebitis and thrombophlebitis of unspecified iliac vein). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- I80.219Phlebitis and thrombophlebitis of unspecified iliac veinapproximate
Common questions about 451.81
What is the ICD-10 code for ICD-9 451.81?
- The GEMs map 451.81 to ICD-10-CM I80.219.
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.