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ICD-10-PCS 2027 procedure code

0H9T0ZZDrainage of Right Breast, Open Approach

✓ Valid for 2027O.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 0H9T0ZZ

0H9T0ZZ is the ICD-10-PCS code for a drainage procedure on the right breast using an open approach. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to Mastotomy, the ICD-9-CM procedure title it maps to (85.0).

For a different body part, codes include 0H9U0ZZ (left breast), 0H9V0ZZ (bilateral breast), 0H9W0ZZ (right nipple) and 0H9X0ZZ (left nipple).

The same procedure with a different approach is coded 0H9T3ZZ (percutaneous), 0H9T7ZZ (via natural or artificial opening) and 0H9T8ZZ (via natural or artificial opening endoscopic).

With a different device, use 0H9T00Z (drainage device).

It is an operating-room procedure in the MS-DRG logic for DRG 584 (Breast Biopsy, Local Excision and Other Breast Procedures with CC/MCC), DRG 585 (Breast Biopsy, Local Excision and Other Breast 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), DRG 630 (Other Endocrine, Nutritional and Metabolic O.R. Procedures without CC/MCC) and DRG 907 (Other O.R. Procedures for Injuries with MCC), under the surgical categories “Breast Biopsy, Local Excision and Other Breast Procedures”, “Other Endocrine, Nutritional and Metabolic O.R. Procedures”, “Other O.R. Procedures for Injuries” and 1 more.

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

What each character means

1. Section
0Medical and Surgical
2. Body System
HSkin and Breast
3. Operation
9Drainage

Taking or letting out fluids and/or gases from a body part

The qualifier DIAGNOSTIC is used to identify drainage procedures that are biopsies

Includes: Thoracentesis, incision and drainage

4. Body Part
TBreast, Right
5. Approach
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure

6. Device
ZNo Device
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different device

Different qualifier

MS-DRG v44.0 grouping

All DRGs →

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

MDC 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast · Breast Biopsy, Local Excision and Other Breast Procedures

ICD-9-CM equivalent

Converter →
  • 85.0Mastotomyapproximate

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 0H9T0ZZ

Is 0H9T0ZZ a valid ICD-10-PCS code for 2027?

Yes. 0H9T0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0H9T0ZZ an O.R. procedure?

Yes. 0H9T0ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0H9T0ZZ group to?

Depending on the principal diagnosis, 0H9T0ZZ can group to MS-DRG 584, MS-DRG 585, MS-DRG 628, MS-DRG 629, MS-DRG 630 and MS-DRG 907.

What is the ICD-9 procedure code for 0H9T0ZZ?

The CMS GEMs map 0H9T0ZZ to ICD-9-CM 85.0 (Mastotomy).