Alphabetic Index FY2027

I80

Phlebitis and thrombophlebitis

FY2027Chapter 9: Diseases of the circulatory system/I80–I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

I80 is a non-billable ICD-10-CM code category for phlebitis and thrombophlebitis. 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 I80.0 Phlebitis and thrombophlebitis of superficial vessels of lower extremities; I80.1 Phlebitis and thrombophlebitis of femoral vein; I80.2 Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities; I80.3 Phlebitis and thrombophlebitis of lower extremities, unspecified and 2 more. 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.

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.-)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (10 notes)
Inherited from Chapter 9 Diseases of the circulatory system
  • 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.

This code
  • endophlebitis
  • inflammation, vein
  • periphlebitis
  • suppurative phlebitis

More specific codes under I80 6