2026 ICD-10-CM Diagnosis Code I80Phlebitis and thrombophlebitis

ICD-10-CM Codes›I00–I99›I80-I89›I80

ICD-10-CM I80
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I80 is a non-billable ICD-10-CM category code for phlebitis and thrombophlebitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I80.00, I80.01, I80.02, and I80.03.

Code Identity

ICD-10-CM Code
I80
Billable Status
No — Non-Billable Category
Code Describes
Phlebitis and thrombophlebitis
Short Description
Phlebitis and thrombophlebitis
Same as the full description in the CMS dataset.
Chapter
I80-I89
Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
CategoryI80Phlebitis and thrombophlebitis
This CodeI80Phlebitis and thrombophlebitis

Specific Coding for Phlebitis and thrombophlebitisOverview

Non-specific codes like I80 require more characters. Use one of these billable codes instead:

  • I80.0 for Phlebitis and thrombophlebitis of superficial vessels of lower extremities

  • Use I80.00 for Phlebitis and thrombophlebitis of superficial vessels of unspecified lower extremity

  • Use I80.01 for Phlebitis and thrombophlebitis of superficial vessels of right lower extremity

  • Use I80.02 for Phlebitis and thrombophlebitis of superficial vessels of left lower extremity

  • Use I80.03 for Phlebitis and thrombophlebitis of superficial vessels of lower extremities, bilateral

  • I80.1 for Phlebitis and thrombophlebitis of femoral vein

  • Use I80.10 for Phlebitis and thrombophlebitis of unspecified femoral vein

  • Use I80.11 for Phlebitis and thrombophlebitis of right femoral vein

  • Use I80.12 for Phlebitis and thrombophlebitis of left femoral vein

  • Use I80.13 for Phlebitis and thrombophlebitis of femoral vein, bilateral

  • I80.2 for Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities

  • I80.20 for Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities

  • I80.21 for Phlebitis and thrombophlebitis of iliac vein

  • I80.22 for Phlebitis and thrombophlebitis of popliteal vein

  • I80.23 for Phlebitis and thrombophlebitis of tibial vein

  • I80.24 for Phlebitis and thrombophlebitis of peroneal vein

  • I80.25 for Phlebitis and thrombophlebitis of calf muscular vein

  • I80.29 for Phlebitis and thrombophlebitis of other deep vessels of lower extremities

  • Use I80.3 for Phlebitis and thrombophlebitis of lower extremities, unspecified

  • Use I80.8 for Phlebitis and thrombophlebitis of other sites

  • Use I80.9 for Phlebitis and thrombophlebitis of unspecified site

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • endophlebitis
  • inflammation, vein
  • periphlebitis
  • suppurative phlebitis

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

Type 1 Excludes

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I80Overview

Is I80 (Phlebitis and thrombophlebitis) a billable code?

No. This is a category header that groups the codes for phlebitis and thrombophlebitis, and headers cannot be submitted on claims. Claims for phlebitis and thrombophlebitis need a more specific code from this category, such as I80.00, I80.01, and I80.02.