I80.20
Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities
I80.20 is a non-billable ICD-10-CM code header for phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are I80.201 Phlebitis and thrombophlebitis of unspecified deep vessels of right lower extremity; I80.202 Phlebitis and thrombophlebitis of unspecified deep vessels of left lower extremity; I80.203 Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities, bilateral and I80.209 Phlebitis and thrombophlebitis of unspecified deep vessels of unspecified lower extremity. Its coding notes include a Code first instruction, 1 Excludes1 entry and 10 Excludes2 entries.
Code first
If the underlying condition listed here is present and known, sequence it first.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (10 notes)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Includes
Further defines or gives examples of the content of the category.
- endophlebitis
- inflammation, vein
- periphlebitis
- suppurative phlebitis
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 1 entry
More specific codes under I80.20 4
- I80.201Phlebitis and thrombophlebitis of unspecified deep vessels of right lower extremityBillable
- I80.202Phlebitis and thrombophlebitis of unspecified deep vessels of left lower extremityBillable
- I80.203Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities, bilateralBillable
- I80.209Phlebitis and thrombophlebitis of unspecified deep vessels of unspecified lower extremityBillable