I80.9 Phlebitis and thrombophlebitis of unspecified site

Billable ICD-10-CM code, FY2026.

Applies from I80 Phlebitis and thrombophlebitis

Includes

• endophlebitis
• inflammation, vein
• periphlebitis
• suppurative phlebitis

Excludes1 (never code together)

• venous embolism and thrombosis of lower extremities (I82.4-, I82.5-, I82.81-)

Code first

• , if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7)
• phlebitis and thrombophlebitis complicating pregnancy, childbirth and the puerperium (O22.-, O87.-)

MS-DRG index

Defines the logic of DRG(s) 299-301 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 451.9 Phlebitis and thrombophlebitis of unspecified site

Diagnosis Index entries for I80.9

• Inflammation, inflamed, inflammatory (with exudation) › vein › thrombotic
• Phlebitis (infective) (pyemic) (septic) (suppurative)
• Phlebitis (infective) (pyemic) (septic) (suppurative) › ulcerative
• Thrombophlebitis

Nearby codes

• I80.292 Phlebitis and thrombophlebitis of other deep vessels of left lower extremity
• I80.293 Phlebitis and thrombophlebitis of other deep vessels of lower extremity, bilateral
• I80.299 Phlebitis and thrombophlebitis of other deep vessels of unspecified lower extremity
• I80.3 Phlebitis and thrombophlebitis of lower extremities, unspecified
• I80.8 Phlebitis and thrombophlebitis of other sites
• I80.9 Phlebitis and thrombophlebitis of unspecified site (this code)