ICD-10-CM code · FY2027
I80.21 Phlebitis and thrombophlebitis of iliac vein
Header codeNot billable: use one of the 4 billable codes below
About I80.21
- Code
- I80.21
- Billable
- No, header
- Short description
- Phlebitis and thrombophlebitis of iliac vein
- Category
- I80 Phlebitis and thrombophlebitis
- Block
- I80-I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
- Chapter
- 9 Diseases of the circulatory system
- Code set
- FY2027, October 1, 2026 to September 30, 2027
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Coding notes for I80.21
Applicable to Other names for conditions reported with this code.
- Phlebitis and thrombophlebitis of common iliac vein
- Phlebitis and thrombophlebitis of external iliac vein
- Phlebitis and thrombophlebitis of internal iliac vein
Also applies, from I80 Phlebitis and thrombophlebitis
Includes Conditions this code covers.
- endophlebitis
- inflammation, vein
- periphlebitis
- suppurative phlebitis
Excludes1 Not coded here: never report these together with this code (use the code given instead).
Code first Report the underlying condition's code before this one.
Chapter 9 notes (apply to every code in it)
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
- 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.-)
Codes under I80.21 4
Related codes in I80.2
- I80.20 Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremitiesHeader
- I80.22 Phlebitis and thrombophlebitis of popliteal veinHeader
- I80.23 Phlebitis and thrombophlebitis of tibial veinHeader
- I80.24 Phlebitis and thrombophlebitis of peroneal veinHeader
- I80.25 Phlebitis and thrombophlebitis of calf muscular veinHeader
- I80.29 Phlebitis and thrombophlebitis of other deep vessels of lower extremitiesHeader
Latest research on deep vein thrombosis
- Apixaban (eliquis) outperforms Rivaroxaban (xarelto) in venous thromboembolism bleeding risk
- Effect of high elevation on deep vein thrombosis: a multicenter cohort study
- Artificial intelligence-guided ultrasound lacks sufficient accuracy for deep vein thrombosis detection
- #VisualAbstract: Reduced-Dose was Not Non-Inferior to Full-Dose Direct Oral Anticoagulants in Venous Thromboembolism Patients
- Physical activity following a deep vein thrombosis reduces the severity of post-thrombotic syndrome
Landmark trials from 2MM Classics
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See 2MM+ plansICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.
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