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ICD-10-PCS 2027 procedure code

D0Y1CZZIntraoperative Radiation Therapy (IORT) of Brain Stem

✓ Valid for 2027

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About D0Y1CZZ

D0Y1CZZ is the ICD-10-PCS code for a other radiation procedure on the brain stem using an intraoperative radiation therapy (IORT) approach with none (qualifier: none).

For a different body part, codes include D0Y0CZZ (brain), D0Y6CZZ (spinal cord) and D0Y7CZZ (peripheral nerve).

The same procedure with a different approach is coded D0Y17ZZ (contact radiation), D0Y18ZZ (hyperthermia) and D0Y1FZZ (plaque radiation).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

It was added in FY2021, effective October 1, 2020.

What each character means

1. Section
DRadiation Therapy
2. Body System
0Central and Peripheral Nervous System
3. Modality
YOther Radiation
4. Treatment Site
1Brain Stem
5. Modality Qualifier
CIntraoperative Radiation Therapy (IORT)
6. Isotope
ZNone
7. Qualifier
ZNone

Other versions of this procedure

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2021 (effective 10/1/2020): Added
  • No changes since FY2021.

Common questions about D0Y1CZZ

Is D0Y1CZZ a valid ICD-10-PCS code for 2027?

Yes. D0Y1CZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.