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ICD-10-PCS 2027 procedure code

DM21DZZStereotactic Other Photon Radiosurgery of Right Breast

✓ Valid for 2027Non-O.R. procedure

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About DM21DZZ

DM21DZZ is the ICD-10-PCS code for a stereotactic radiosurgery procedure on the right breast using a stereotactic other photon radiosurgery approach with none (qualifier: none).

In plain terms, this corresponds to single source photon radiosurgery and Stereotactic radiosurgery, not elsewhere classified, the ICD-9-CM procedure titles it maps to (92.31 and 92.39).

For a different body part, codes include DM20DZZ (left breast).

The same procedure with a different approach is coded DM21HZZ (stereotactic particulate radiosurgery) and DM21JZZ (stereotactic gamma beam radiosurgery).

It is a non-O.R. procedure that is part of the MS-DRG logic for DRG 040 (Peripheral, Cranial Nerve and Other Nervous System Procedures with MCC), DRG 041 (Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator), DRG 042 (Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC), DRG 628 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with MCC or Insertion of Antibiotic-eluting Bone Void Filler), DRG 629 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with CC) and DRG 630 (Other Endocrine, Nutritional and Metabolic O.R. Procedures without CC/MCC), under the surgical categories “Peripheral, Cranial Nerve and Other Nervous System Procedures”, “Other Endocrine, Nutritional and Metabolic O.R. Procedures”, “Lymphoma and Non-Acute Leukemia with Other Procedures” and 2 more.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

What each character means

1. Section
DRadiation Therapy
2. Body System
MBreast
3. Modality
2Stereotactic Radiosurgery
4. Treatment Site
1Breast, Right
5. Modality Qualifier
DStereotactic Other Photon Radiosurgery
6. Isotope
ZNone
7. Qualifier
ZNone

Other versions of this procedure

Different treatment site

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

MDC 17 · Myeloproliferative Diseases and Disorders, Poorly Differentiated Neoplasms · Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures

MDC 17 · Myeloproliferative Diseases and Disorders, Poorly Differentiated Neoplasms · Acute Leukemia with Other Procedures

ICD-9-CM equivalent

Converter →
  • 92.31Single source photon radiosurgeryapproximate
  • 92.39Stereotactic radiosurgery, not elsewhere classifiedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about DM21DZZ

Is DM21DZZ a valid ICD-10-PCS code for 2027?

Yes. DM21DZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is DM21DZZ an O.R. procedure?

No. DM21DZZ is designated non-O.R. in MS-DRG v44.0.

What DRG does DM21DZZ group to?

Depending on the principal diagnosis, DM21DZZ can group to MS-DRG 040, MS-DRG 041, MS-DRG 042, MS-DRG 628, MS-DRG 629 and MS-DRG 630.

What is the ICD-9 procedure code for DM21DZZ?

The CMS GEMs map DM21DZZ to ICD-9-CM 92.31 (Single source photon radiosurgery) and 92.39 (Stereotactic radiosurgery, not elsewhere classified).