ICD-10 Code for Thrombophlebitis

The ICD-10-CM code for thrombophlebitis is I80.9 — Phlebitis and thrombophlebitis of unspecified site. This is the code the Alphabetic Index gives for thrombophlebitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).

BillableUnspecified

I80.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.

Which thrombophlebitis code should you use?

The Alphabetic Index lists 23 codes under Thrombophlebitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.

By type

antepartum	O22.2	Superficial thrombophlebitis in pregnancy	not billable
calf muscular vein	I80.25	Phlebitis and thrombophlebitis of calf muscular vein	not billable
cavernoussinus	G08	Intracranial and intraspinal phlebitis and thrombophlebitis
cerebral	G08	Intracranial and intraspinal phlebitis and thrombophlebitis
during or resulting from a procedure NEC	T81.72	Complication of vein following a procedure, not elsewhere classified	not billable
femoral vein	I80.1	Phlebitis and thrombophlebitis of femoral vein	not billable
femoropopliteal vein	I80.0	Phlebitis and thrombophlebitis of superficial vessels of lower extremities	not billable
gastrocnemial vein	I80.25	Phlebitis and thrombophlebitis of calf muscular vein	not billable
hepatic	I80.8	Phlebitis and thrombophlebitis of other sites
idiopathic, recurrent	I82.1	Thrombophlebitis migrans
iliac vein	I80.21	Phlebitis and thrombophlebitis of iliac vein	not billable
iliofemoral	I80.1	Phlebitis and thrombophlebitis of femoral vein	not billable
intracranial venous sinus	G08	Intracranial and intraspinal phlebitis and thrombophlebitis
intraspinal venous sinuses and veins	G08	Intracranial and intraspinal phlebitis and thrombophlebitis
lateralsinus	G08	Intracranial and intraspinal phlebitis and thrombophlebitis
longitudinalsinus	G08	Intracranial and intraspinal phlebitis and thrombophlebitis
migrans, migrating	I82.1	Thrombophlebitis migrans
peroneal vein	I80.24	Phlebitis and thrombophlebitis of peroneal vein	not billable
portal	K75.1	Phlebitis of portal vein
postoperative	T81.72	Complication of vein following a procedure, not elsewhere classified	not billable
puerperal, postpartum, childbirth	O87.0	Superficial thrombophlebitis in the puerperium
saphenous	I80.0	Phlebitis and thrombophlebitis of superficial vessels of lower extremities	not billable
sinus	G08	Intracranial and intraspinal phlebitis and thrombophlebitis
soleal vein	I80.25	Phlebitis and thrombophlebitis of calf muscular vein	not billable
specified site NEC	I80.8	Phlebitis and thrombophlebitis of other sites
tibial vein	I80.23	Phlebitis and thrombophlebitis of tibial vein	not billable

Thrombophlebitis antepartum

deep	O22.3	Deep phlebothrombosis in pregnancy	not billable
superficial	O22.2	Superficial thrombophlebitis in pregnancy	not billable

Thrombophlebitis cavernoussinus

complicating pregnancy	O22.5	Cerebral venous thrombosis in pregnancy	not billable
nonpyogenic	I67.6	Nonpyogenic thrombosis of intracranial venous system

Thrombophlebitis cerebral

nonpyogenic	I67.6	Nonpyogenic thrombosis of intracranial venous system
sequelae	G09	Sequelae of inflammatory diseases of central nervous system

Thrombophlebitis intracranial venous sinus

nonpyogenic	I67.6	Nonpyogenic thrombosis of intracranial venous system
sequelae	G09	Sequelae of inflammatory diseases of central nervous system

Thrombophlebitis intraspinal venous sinuses and veins

nonpyogenic

G95.19

Other vascular myelopathies

Thrombophlebitis lateralsinus

nonpyogenic

I67.6

Nonpyogenic thrombosis of intracranial venous system

Thrombophlebitis longitudinalsinus

nonpyogenic

I67.6

Nonpyogenic thrombosis of intracranial venous system

Thrombophlebitis lower extremity

deep

I80.29

Phlebitis and thrombophlebitis of other deep vessels of lower extremities

not billable

Thrombophlebitis 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

Thrombophlebitis puerperal, postpartum, childbirth

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

Thrombophlebitis sinus

nonpyogenic

I67.6

Nonpyogenic thrombosis of intracranial venous system

Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources