ICD-10-CM 2027
ICD-10 code for leg phlebitis
From the official ICD-10-CM alphabetic index entry “Phlebitis (infective) (pyemic) (septic) (suppurative) › leg”. Page updated September 29, 2026.
About coding leg phlebitis
The ICD-10-CM code for leg phlebitis is I80.3 (Phlebitis and thrombophlebitis of lower extremities, unspecified). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I80.3.
Within I80, choose I80.3 (of lower extremities, unspecified) 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 other sites (I80.8) and of unspecified site (I80.9).
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 leg phlebitis codes (official index)
- antepartum
- deep (vessels) NEC I80.20 — Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities
- iliac I80.21 — Phlebitis and thrombophlebitis of iliac vein
- popliteal vein I80.22 — Phlebitis and thrombophlebitis of popliteal vein
- specified vessel NEC I80.29 — Phlebitis and thrombophlebitis of other deep vessels of lower extremities
- tibial vein (anterior) (posterior) I80.23 — Phlebitis and thrombophlebitis of tibial vein
- femoral vein (superficial) I80.1 — Phlebitis and thrombophlebitis of femoral vein
- superficial (vessels) I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities
Common questions about leg phlebitis ICD-10 codes
What is the ICD-10 code for leg phlebitis?
- I80.3 — Phlebitis and thrombophlebitis of lower extremities, unspecified. More specific codes apply when the documentation supports them: I80.20, I80.21, I80.22, I80.29 and others below.
What is the ICD-10 code for deep nec leg phlebitis?
- I80.20 — Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities (header code; choose a more specific subcode).
What is the ICD-10 code for femoral vein leg phlebitis?
- I80.1 — Phlebitis and thrombophlebitis of femoral vein (header code; choose a more specific subcode).
What is the ICD-10 code for superficial leg phlebitis?
- I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities (header code; choose a more specific subcode).
Is I80.3 billable?
- Yes. I80.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I80.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I80.3 as a principal diagnosis.
Is I80.3 a CC or MCC?
- No. I80.3 is neither a CC nor an MCC under MS-DRG v44.0.