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ICD-10-PCS 2027 procedure code

0TT40ZZResection of Left Kidney Pelvis, 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 0TT40ZZ

0TT40ZZ is the ICD-10-PCS code for a resection procedure on the left kidney pelvis using an open approach. In ICD-10-PCS, resection means cutting out or off, without replacement, all of a body part.

In plain terms, this corresponds to partial nephrectomy, the ICD-9-CM procedure title it maps to (55.4).

For a different body part, codes include 0TT00ZZ (right kidney), 0TT10ZZ (left kidney), 0TT20ZZ (bilateral kidneys), 0TT30ZZ (right kidney pelvis), 0TT60ZZ (right ureter), 0TT70ZZ (left ureter) and 3 more.

The same procedure with a different approach is coded 0TT44ZZ (percutaneous endoscopic), 0TT47ZZ (via natural or artificial opening) and 0TT48ZZ (via natural or artificial opening endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 656 (Kidney and Ureter Procedures for Neoplasm with MCC), DRG 657 (Kidney and Ureter Procedures for Neoplasm with CC), DRG 658 (Kidney and Ureter Procedures for Neoplasm without CC/MCC), DRG 659 (Kidney and Ureter Procedures for Non-Neoplasm with MCC), DRG 660 (Kidney and Ureter Procedures for Non-Neoplasm with CC) and DRG 661 (Kidney and Ureter Procedures for Non-Neoplasm without CC/MCC), under the surgical categories “”, “Kidney and Ureter Procedures for Non-Neoplasm”, “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
TUrinary System
3. Operation
TResection

Cutting out or off, without replacement, all of a body part

Includes: Total nephrectomy, total lobectomy of lung

4. Body Part
4Kidney Pelvis, Left

Includes: Ureteropelvic junction (UPJ)

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

MS-DRG v44.0 grouping

All DRGs →

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

ICD-9-CM equivalent

Converter →
  • 55.4Partial nephrectomyapproximate

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 0TT40ZZ

Is 0TT40ZZ a valid ICD-10-PCS code for 2027?

Yes. 0TT40ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0TT40ZZ an O.R. procedure?

Yes. 0TT40ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0TT40ZZ group to?

Depending on the principal diagnosis, 0TT40ZZ can group to MS-DRG 656, MS-DRG 657, MS-DRG 658, MS-DRG 659, MS-DRG 660 and MS-DRG 661.

What is the ICD-9 procedure code for 0TT40ZZ?

The CMS GEMs map 0TT40ZZ to ICD-9-CM 55.4 (Partial nephrectomy).