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ICD-10-PCS 2027 procedure code

01NG4ZZRelease Tibial Nerve, Percutaneous Endoscopic 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 01NG4ZZ

01NG4ZZ is the ICD-10-PCS code for a release procedure on the tibial nerve using a percutaneous endoscopic 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 release of tarsal tunnel, the ICD-9-CM procedure title it maps to (04.44).

For a different body part, codes include 01N04ZZ (cervical plexus), 01N14ZZ (cervical nerve), 01N24ZZ (phrenic nerve), 01N34ZZ (brachial plexus), 01N44ZZ (ulnar nerve), 01N54ZZ (median nerve) and 16 more.

The same procedure with a different approach is coded 01NG0ZZ (open) and 01NG3ZZ (percutaneous).

It is an operating-room procedure in 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 503 (Foot Procedures with MCC), DRG 504 (Foot Procedures with CC) and DRG 505 (Foot Procedures without CC/MCC), under the surgical categories “Peripheral, Cranial Nerve and Other Nervous System Procedures”, “Foot 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
1Peripheral Nervous System
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
GTibial Nerve

Includes: Lateral plantar nerve; Medial plantar nerve; Medial popliteal nerve; Medial sural cutaneous nerve

5. Approach
4Percutaneous Endoscopic

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize 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.

MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue · Foot Procedures

ICD-9-CM equivalent

Converter →
  • 04.44Release of tarsal tunnelapproximate

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 01NG4ZZ

Is 01NG4ZZ a valid ICD-10-PCS code for 2027?

Yes. 01NG4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 01NG4ZZ an O.R. procedure?

Yes. 01NG4ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 01NG4ZZ group to?

Depending on the principal diagnosis, 01NG4ZZ can group to MS-DRG 040, MS-DRG 041, MS-DRG 042, MS-DRG 503, MS-DRG 504 and MS-DRG 505.

What is the ICD-9 procedure code for 01NG4ZZ?

The CMS GEMs map 01NG4ZZ to ICD-9-CM 04.44 (Release of tarsal tunnel).