ICD-10-CM 2027
ICD-10 code for phlebitis
From the official ICD-10-CM alphabetic index entry “Phlebitis (infective) (pyemic) (septic) (suppurative)”. Page updated September 29, 2026.
About coding phlebitis
The ICD-10-CM code for phlebitis is I80.9 (Phlebitis and thrombophlebitis of unspecified site). The official index lists 37 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I80.9.
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 phlebitis codes (official index)
- antepartum
- blue
- breast, superficial I80.8 — Phlebitis and thrombophlebitis of other sites
- cavernous (venous) sinus
- calf muscular vein (NOS) I80.25 — Phlebitis and thrombophlebitis of calf muscular vein
- cerebral (venous) sinus
- chest wall, superficial I80.8 — Phlebitis and thrombophlebitis of other sites
- cranial (venous) sinus
- deep (vessels)
- due to implanted device
- during or resulting from a procedure T81.72 — Complication of vein following a procedure, not elsewhere classified
- femoral vein (superficial) I80.1 — Phlebitis and thrombophlebitis of femoral vein
- femoropopliteal vein I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities
- gastrocnemial vein I80.25 — Phlebitis and thrombophlebitis of calf muscular vein
- gestational
- hepatic veins I80.8 — Phlebitis and thrombophlebitis of other sites
- iliac vein (common) (external) (internal) I80.21 — Phlebitis and thrombophlebitis of iliac vein
- iliofemoral
- intracranial (venous) sinus (any) G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic I67.6 — Nonpyogenic thrombosis of intracranial venous system
- intraspinal venous sinuses and veins G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic G95.19 — Other vascular myelopathies
- lateral (venous) sinus
- leg I80.3 — Phlebitis and thrombophlebitis of lower extremities, unspecified
- 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
- longitudinal sinus
- lower limb
- migrans, migrating (superficial) I82.1 — Thrombophlebitis migrans
- pelvic
- with ectopic or molar pregnancy O08.0 — Genital tract and pelvic infection following ectopic and molar pregnancy
- following ectopic or molar pregnancy O08.0 — Genital tract and pelvic infection following ectopic and molar pregnancy
- puerperal, postpartum O87.1 — Deep phlebothrombosis in the puerperium
- peroneal vein I80.24 — Phlebitis and thrombophlebitis of peroneal vein
- popliteal vein
- portal (vein) K75.1 — Phlebitis of portal vein
- postoperative T81.72 — Complication of vein following a procedure, not elsewhere classified
- pregnancy
- puerperal, postpartum, childbirth O87.0 — Superficial thrombophlebitis in the puerperium
- deep O87.1 — Deep phlebothrombosis in the puerperium
- pelvic O87.1 — Deep phlebothrombosis in the puerperium
- superficial O87.0 — Superficial thrombophlebitis in the puerperium
- retina
- saphenous (accessory) (great) (long) (small)
- sinus (meninges)
- soleal vein I80.25 — Phlebitis and thrombophlebitis of calf muscular vein
- specified site NEC I80.8 — Phlebitis and thrombophlebitis of other sites
- syphilitic A52.09 — Other cardiovascular syphilis
- tibial vein
- ulcerative I80.9 — Phlebitis and thrombophlebitis of unspecified site
- leg
- umbilicus I80.8 — Phlebitis and thrombophlebitis of other sites
- uterus (septic)
- varicose (leg) (lower limb)
Common questions about phlebitis ICD-10 codes
What is the ICD-10 code for phlebitis?
- I80.9 — Phlebitis and thrombophlebitis of unspecified site. More specific codes apply when the documentation supports them: I80.8, I80.25, I80.8, T81.72 and others below.
What is the ICD-10 code for calf muscular vein phlebitis?
- I80.25 — Phlebitis and thrombophlebitis of calf muscular vein (header code; choose a more specific subcode).
What is the ICD-10 code for femoral vein phlebitis?
- I80.1 — Phlebitis and thrombophlebitis of femoral vein (header code; choose a more specific subcode).
What is the ICD-10 code for femoropopliteal vein phlebitis?
- I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities (header code; choose a more specific subcode).
What is the ICD-10 code for gastrocnemial vein phlebitis?
- I80.25 — Phlebitis and thrombophlebitis of calf muscular vein (header code; choose a more specific subcode).
What is the ICD-10 code for hepatic veins phlebitis?
- I80.8 — Phlebitis and thrombophlebitis of other sites.
What is the ICD-10 code for iliac vein phlebitis?
- I80.21 — Phlebitis and thrombophlebitis of iliac vein (header code; choose a more specific subcode).
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.