ICD-10 Code I80.292 – Phlebitis and thrombophlebitis of other deep vessels of left lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.292 – Phlebitis and thrombophlebitis of other deep vessels of left lower extremity
What it is
This code identifies inflammation and clot formation in a deep vein of the left lower extremity that is not one of the specifically named deep vessels. Use it when documentation clearly states the left side and a deep venous location.
Clinical signs
Typical findings include unilateral leg pain, swelling, tenderness, warmth, or redness. Clinical features vary; refer to documentation, and confirm that the affected vein is deep and on the left lower extremity.
When to use this code
Use I80.292 when the provider documents phlebitis or thrombophlebitis involving an other specified deep vein in the left leg. It is appropriate for charted deep venous thrombosis with inflammatory wording when the site matches this code. If the record does not specify the vessel or laterality, check documentation.
Do not use for
Do not use this code for superficial vein thrombophlebitis or for deep veins of the right leg. If the documentation names a different deep vessel or only says “unspecified,” check documentation.
Coding tip
Verify both laterality and the exact deep vessel description before assigning I80.292.