I80.3 is the authoritative medical code for Phlebitis and thrombophlebitis of lower extremities, unspecified. This classification is used in medical billing and clinical recording to specify the clinical criteria for phlebitis and thrombophlebitis of lower extremities, unspecified (ICD-10-CM I80.3), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Phlebitis and thrombophlebitis of lower extremities, unspecified is a billable ICD-10-CM diagnosis code I80.3. Includes: endophlebitis; inflammation, vein; periphlebitis; suppurative phlebitis. Excludes1 (not coded here): 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.-).
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for I80.3 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- endophlebitis
- inflammation, vein
- periphlebitis
- suppurative phlebitis
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- venous embolism and thrombosis of lower extremities (I82.4-, I82.5-, I82.81-)
Code First
Underlying conditions that must be sequenced before this code.
- , 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.-)
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with I80.3?
Per official ICD-10-CM Excludes1 instructions, I80.3 must not be reported together with: venous embolism and thrombosis of lower extremities (I82.4-, I82.5-, I82.81-).
Does I80.3 need to be sequenced after another code?
Yes. 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.-).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to I80.3 in its code family, with their registry titles.
- I80 — Phlebitis and thrombophlebitis
- I80-I89 — Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)
- I80.0 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities
- I80.00 — Phlebitis and thrombophlebitis of superficial vessels of unspecified lower extremity
- I80.01 — Phlebitis and thrombophlebitis of superficial vessels of right lower extremity
- I80.02 — Phlebitis and thrombophlebitis of superficial vessels of left lower extremity
- I80.03 — Phlebitis and thrombophlebitis of superficial vessels of lower extremities, bilateral
- I80.1 — Phlebitis and thrombophlebitis of femoral vein
- I80.10 — Phlebitis and thrombophlebitis of unspecified femoral vein
- I80.11 — Phlebitis and thrombophlebitis of right femoral vein
View all 40 codes in the I80 family
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Phlebitis (infective) (pyemic) (septic) (suppurative), leg