ICD-10-CM 2027
ICD-10 code for thrombophlebitis
From the official ICD-10-CM alphabetic index entry “Thrombophlebitis”. Page updated September 29, 2026.
About coding thrombophlebitis
The ICD-10-CM code for thrombophlebitis is I80.9 (Phlebitis and thrombophlebitis of unspecified site). The official index lists 46 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 thrombophlebitis codes (official index)
- antepartum O22.2 — Superficial thrombophlebitis in pregnancy
- deep O22.3 — Deep phlebothrombosis in pregnancy
- superficial O22.2 — Superficial thrombophlebitis in pregnancy
- calf muscular vein (NOS) I80.25 — Phlebitis and thrombophlebitis of calf muscular vein
- cavernous (venous) sinus G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- complicating pregnancy O22.5 — Cerebral venous thrombosis in pregnancy
- nonpyogenic I67.6 — Nonpyogenic thrombosis of intracranial venous system
- cerebral (sinus) (vein) G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic I67.6 — Nonpyogenic thrombosis of intracranial venous system
- sequelae G09 — Sequelae of inflammatory diseases of central nervous system
- due to implanted device
- during or resulting from a procedure NEC 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
- hepatic (vein) I80.8 — Phlebitis and thrombophlebitis of other sites
- idiopathic, recurrent I82.1 — Thrombophlebitis migrans
- iliac vein (common) (external) (internal) I80.21 — Phlebitis and thrombophlebitis of iliac vein
- iliofemoral I80.1 — Phlebitis and thrombophlebitis of femoral vein
- intracranial venous sinus (any) G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic I67.6 — Nonpyogenic thrombosis of intracranial venous system
- sequelae G09 — Sequelae of inflammatory diseases of central nervous system
- intraspinal venous sinuses and veins G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic G95.19 — Other vascular myelopathies
- lateral (venous) sinus G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic I67.6 — Nonpyogenic thrombosis of intracranial venous system
- leg
- longitudinal (venous) sinus G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic I67.6 — Nonpyogenic thrombosis of intracranial venous system
- lower extremity
- deep I80.29 — Phlebitis and thrombophlebitis of other deep vessels of lower extremities
- migrans, migrating 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 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
- septic O86.81 — Puerperal septic thrombophlebitis
- superficial O87.0 — Superficial thrombophlebitis in the puerperium
- saphenous (greater) (lesser) I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities
- sinus (intracranial) G08 — Intracranial and intraspinal phlebitis and thrombophlebitis
- nonpyogenic I67.6 — Nonpyogenic thrombosis of intracranial venous system
- soleal vein I80.25 — Phlebitis and thrombophlebitis of calf muscular vein
- specified site NEC I80.8 — Phlebitis and thrombophlebitis of other sites
- tibial vein (anterior) (posterior) I80.23 — Phlebitis and thrombophlebitis of tibial vein
Common questions about thrombophlebitis ICD-10 codes
What is the ICD-10 code for thrombophlebitis?
- I80.9 — Phlebitis and thrombophlebitis of unspecified site. More specific codes apply when the documentation supports them: O22.2, O22.3, O22.2, I80.25 and others below.
What is the ICD-10 code for antepartum thrombophlebitis?
- O22.2 — Superficial thrombophlebitis in pregnancy (header code; choose a more specific subcode).
What is the ICD-10 code for calf muscular vein thrombophlebitis?
- I80.25 — Phlebitis and thrombophlebitis of calf muscular vein (header code; choose a more specific subcode).
What is the ICD-10 code for cavernous sinus thrombophlebitis?
- G08 — Intracranial and intraspinal phlebitis and thrombophlebitis.
What is the ICD-10 code for cerebral thrombophlebitis?
- G08 — Intracranial and intraspinal phlebitis and thrombophlebitis.
What is the ICD-10 code for femoral vein thrombophlebitis?
- I80.1 — Phlebitis and thrombophlebitis of femoral vein (header code; choose a more specific subcode).
What is the ICD-10 code for femoropopliteal vein thrombophlebitis?
- I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities (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.