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2025 ICD-10-CM code I80.9

Phlebitis and thrombophlebitis of unspecified site.

Ensure accurate documentation to support the diagnosis.If possible, use a more specific code from the I80 series if the location is determined.

Not applicable to ICD-10 codes; Modifiers apply to procedural codes (CPT, HCPCS).

Medical necessity is established by the presence of symptoms and clinical findings consistent with phlebitis or thrombophlebitis.Further testing may be required to rule out other conditions.

Diagnosis and management of venous inflammation and/or thrombosis. This may involve clinical examination, diagnostic testing (e.g., ultrasound), and treatment (e.g., anticoagulation, supportive measures).

IMPORTANT:Consider using more specific codes from the I80-I89 range if the location of the phlebitis or thrombophlebitis is known.For example, I80.0 for superficial vessels of the lower extremities or I80.1 for the femoral vein.If the condition is related to pregnancy or childbirth, refer to codes in chapters O00-O9A.

In simple words: This code is used when someone has inflammation in a vein, possibly with a blood clot, but the exact location of the inflammation isn't known.

This code represents phlebitis (inflammation of a vein) and thrombophlebitis (inflammation of a vein with blood clot formation) where the specific location is unknown or not specified.It includes conditions such as endophlebitis, periphlebitis, and suppurative phlebitis, but excludes venous embolism and thrombosis of the lower extremities, those complicating pregnancy or childbirth, and those affecting specific locations like the intracranial or portal veins.

Example 1: A patient presents with pain, swelling, and redness in their leg, but the exact vein affected cannot be determined by physical exam or ultrasound.I80.9 is used., A patient with a history of deep vein thrombosis has persistent leg pain and swelling, but imaging does not identify a new clot.I80.9 may be used to code the ongoing venous inflammation., A patient is admitted to the hospital with symptoms suggestive of thrombophlebitis, but diagnostic tests are inconclusive regarding the precise location. I80.9 is the appropriate code.

* Detailed description of symptoms (pain, swelling, redness, warmth).* Location of the affected area (even if unspecified).* Results of any diagnostic tests (ultrasound, blood tests).* Treatment provided.* Physician's assessment and diagnosis.

** This code should be used only when the specific site of phlebitis or thrombophlebitis cannot be determined.Always strive for the most specific coding possible based on available clinical information.

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