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ICD-10-PCS 2027 procedure code

01N33ZZRelease Brachial Plexus, Percutaneous 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 01N33ZZ

01N33ZZ is the ICD-10-PCS code for a release procedure on the brachial plexus using a percutaneous 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 other peripheral nerve or ganglion decompression or lysis of adhesions, the ICD-9-CM procedure title it maps to (04.49).

For a different body part, codes include 01N03ZZ (cervical plexus), 01N13ZZ (cervical nerve), 01N23ZZ (phrenic nerve), 01N43ZZ (ulnar nerve), 01N53ZZ (median nerve), 01N63ZZ (radial nerve) and 16 more.

The same procedure with a different approach is coded 01N30ZZ (open) and 01N34ZZ (percutaneous endoscopic).

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 515 (Other Musculoskeletal System and Connective Tissue O.R. Procedures with MCC), DRG 516 (Other Musculoskeletal System and Connective Tissue O.R. Procedures with CC) and DRG 517 (Other Musculoskeletal System and Connective Tissue O.R. Procedures without CC/MCC), under the surgical categories “Peripheral, Cranial Nerve and Other Nervous System Procedures”, “Other Musculoskeletal System and Connective Tissue 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
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
3Brachial Plexus

Includes: Axillary nerve; Dorsal scapular nerve; First intercostal nerve; Long thoracic nerve; Musculocutaneous nerve; Subclavius nerve; Suprascapular nerve

5. Approach
3Percutaneous

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach 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 →
  • 04.49Other peripheral nerve or ganglion decompression or lysis of adhesionsapproximate

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 01N33ZZ

Is 01N33ZZ a valid ICD-10-PCS code for 2027?

Yes. 01N33ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 01N33ZZ an O.R. procedure?

Yes. 01N33ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 01N33ZZ group to?

Depending on the principal diagnosis, 01N33ZZ can group to MS-DRG 040, MS-DRG 041, MS-DRG 042, MS-DRG 515, MS-DRG 516 and MS-DRG 517.

What is the ICD-9 procedure code for 01N33ZZ?

The CMS GEMs map 01N33ZZ to ICD-9-CM 04.49 (Other peripheral nerve or ganglion decompression or lysis of adhesions).