ICD-10-CM 2027
ICD-10 code for ulcerative phlebitis
From the official ICD-10-CM alphabetic index entry “Phlebitis (infective) (pyemic) (septic) (suppurative) › ulcerative”. Page updated September 29, 2026.
About coding ulcerative phlebitis
The ICD-10-CM code for ulcerative phlebitis is I80.9 (Phlebitis and thrombophlebitis of unspecified site).
Within I80, choose I80.9 (of unspecified site) only when documentation doesn't support a more specific option: of superficial vessels of lower extremities (I80.0), of femoral vein (I80.1), of other and unspecified deep vessels of lower extremities (I80.2), of lower extremities, unspecified (I80.3) and of other sites (I80.8).
Code first: , if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7) and phlebitis and thrombophlebitis complicating pregnancy, childbirth and the puerperium (O22.-, O87.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific ulcerative phlebitis codes (official index)
- leg
Common questions about ulcerative phlebitis ICD-10 codes
What is the ICD-10 code for ulcerative phlebitis?
- I80.9 — Phlebitis and thrombophlebitis of unspecified site.
Is I80.9 billable?
- Yes. I80.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I80.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I80.9 as a principal diagnosis.
Is I80.9 a CC or MCC?
- No. I80.9 is neither a CC nor an MCC under MS-DRG v44.0.