2021 ICD-10-CM Code I80.259

Phlebitis and thrombophlebitis of unspecified calf muscular vein

Version 2021

Valid for Submission

ICD-10:I80.259
Short Description:Phlebitis and thombophlb of unspecified calf muscular vein
Long Description:Phlebitis and thrombophlebitis of unspecified calf muscular vein

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)
      • Phlebitis and thrombophlebitis (I80)

I80.259 is a billable diagnosis code used to specify a medical diagnosis of phlebitis and thrombophlebitis of unspecified calf muscular vein. The code I80.259 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

Unspecified diagnosis codes like I80.259 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Replacement Code

I80259 replaces the following previously assigned ICD-10 code(s):

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020