Requirements for Using the KX Modifier with TSPD

When billing for Therapeutic Shoes for Persons with Diabetes (TSPD), the KX modifier should be applied only if:

  1. The patient meets Medicare’s coverage criteria, such as:
    • Diagnosis of diabetes
    • Presence of qualifying foot conditions (e.g., neuropathy, deformity, ulceration)
  2. A certifying physician must provide documentation confirming:
    • The patient’s condition
    • The medical necessity of the shoes and inserts
    • Standard Written Order

For complete details, please review our Therapeutic Shoes for Persons with Diabetes webpage.

Last Updated Dec 23 , 2025