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ICD-10-PCS 2027 procedure code

04NB0ZZRelease Inferior Mesenteric Artery, 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 04NB0ZZ

04NB0ZZ is the ICD-10-PCS code for a release procedure on the inferior mesenteric artery using an open approach. In ICD-10-PCS, release means freeing a body part from an abnormal physical constraint by cutting or by the use of force.

In plain terms, this corresponds to Freeing of vessel, the ICD-9-CM procedure title it maps to (39.91).

For a different body part, codes include 04N00ZZ (abdominal aorta), 04N10ZZ (celiac artery), 04N20ZZ (gastric artery), 04N30ZZ (hepatic artery), 04N40ZZ (splenic artery), 04N50ZZ (superior mesenteric artery) and 24 more.

The same procedure with a different approach is coded 04NB3ZZ (percutaneous) and 04NB4ZZ (percutaneous endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 252 (Other Vascular Procedures with MCC), DRG 253 (Other Vascular Procedures with CC), DRG 254 (Other Vascular Procedures without CC/MCC), DRG 356 (Other Digestive System O.R. Procedures with MCC), DRG 357 (Other Digestive System O.R. Procedures with CC) and DRG 358 (Other Digestive System O.R. Procedures without CC/MCC), under the surgical categories “Other Vascular Procedures” and “Other Digestive System O.R. Procedures”.

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
4Lower Arteries
3. Operation
NRelease

Freeing a body part from an abnormal physical constraint by cutting or by the use of force

Some of the restraining tissue may be taken out but none of the body part is taken out

Includes: Adhesiolysis, carpal tunnel release

4. Body Part
BInferior Mesenteric Artery

Includes: Sigmoid artery; Superior rectal artery

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 →
  • 39.91Freeing of vesselapproximate

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 04NB0ZZ

Is 04NB0ZZ a valid ICD-10-PCS code for 2027?

Yes. 04NB0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 04NB0ZZ an O.R. procedure?

Yes. 04NB0ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 04NB0ZZ group to?

Depending on the principal diagnosis, 04NB0ZZ can group to MS-DRG 252, MS-DRG 253, MS-DRG 254, MS-DRG 356, MS-DRG 357 and MS-DRG 358.

What is the ICD-9 procedure code for 04NB0ZZ?

The CMS GEMs map 04NB0ZZ to ICD-9-CM 39.91 (Freeing of vessel).