CMS issues a clarification of brachytherapy source descriptors

The descriptors published in Transmittal 423 for HCPCS codes C2634 and C2635 are incorrect. In Table 40 of the November 15, 2004 final rule, the correct descriptors are listed. In a recent transmittal, Transmittal 514, CMS is reinstating the correct long descriptors for HCPCS codes C2634 and C2635 , as follows: C2634 —Brachytherapy Source, High Activity, Iodine-125, greater than 1.01 Mci (NIST), per source C2635 —Brachytherapy Source, High Activity, Paladium-103, greater than 2.2 MCI (NIST), per source Additional information regarding these brachytherapy sources can be found in Transmittal 423. ...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article explains a CMS correction related to HCPCS brachytherapy source descriptors and notes where the updated wording appears in CMS transmittal materials. It is relevant to coding and billing staff who work with radiation oncology supplies, HCPCS updates, and Medicare administrative guidance.

Why This Topic Matters

Accurate HCPCS descriptor information helps ensure consistent charge capture, claim reporting, and compliance when reporting brachytherapy source supplies. The article is useful for organizations that monitor CMS transmittals and need to keep internal references aligned with official updates.

What You Will Learn

  • Which CMS transmittal was corrected
  • How the article situates the clarification within CMS guidance documents
  • Where related brachytherapy source information can be found
  • Which HCPCS source descriptors were reinstated

Who Should Read This

  • Medical coders
  • Coding auditors
  • Charge capture teams
  • Radiation oncology billing staff
  • Revenue cycle professionals

Codes Discussed


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