2027 ICD-10-CM Diagnosis Code I80Phlebitis and thrombophlebitis

ICD-10-CM Codes›I00–I99›I80-I89›I80

ICD-10-CM I80
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I80: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

  • endophlebitis
  • inflammation, vein
  • periphlebitis
  • suppurative phlebitis

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • 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.-)

Code First

The underlying condition named in the note is 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.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I80Overview

What is the ICD-10 code for phlebitis and thrombophlebitis?

I80 is the ICD-10-CM category for phlebitis and thrombophlebitis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can I80 be reported with a code from I82.4?

Not as a rule. The Excludes1 note on I80 lists "venous embolism and thrombosis of lower extremities (I82.4-, I82.5-, I82.81-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is coded first with I80?

The Code First note reads: 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.-). When one of these applies, it is sequenced before I80.