I80 – Phlebitis and thrombophlebitis

ICD-10-CM 2027 diagnosis code · Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

Non-billable header

ICD-10-CM code I80

Code: I80 (claims format: I80)
Description: Phlebitis and thrombophlebitis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I80-I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

Billable codes under I80

I80 is a header code and cannot be used on claims. Choose the most specific code:

I80.0 – Phlebitis and thrombophlebitis of superficial vessels of lower extremitiesHeader (more codes below)
I80.1 – Phlebitis and thrombophlebitis of femoral veinHeader (more codes below)
I80.2 – Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremitiesHeader (more codes below)
I80.3 – Phlebitis and thrombophlebitis of lower extremities, unspecifiedBillable
I80.8 – Phlebitis and thrombophlebitis of other sitesBillable
I80.9 – Phlebitis and thrombophlebitis of unspecified siteBillable

Notes for I80

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.-)

Frequently asked questions

What is ICD-10 code I80?

I80 is the ICD-10-CM code for phlebitis and thrombophlebitis, in the block I80-I89 (Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified).

Is I80 a billable code?

No. I80 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.