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ICD-10-PCS 2027 procedure code

01844ZZDivision of Ulnar 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 01844ZZ

01844ZZ is the ICD-10-PCS code for a division procedure on the ulnar nerve using a percutaneous endoscopic approach. In ICD-10-PCS, division means cutting into a body part, without draining fluids and/or gases from the body part, in order to separate or transect a body part.

In plain terms, this corresponds to division or crushing of other cranial and peripheral nerves, the ICD-9-CM procedure title it maps to (04.03).

For a different body part, codes include 01804ZZ (cervical plexus), 01814ZZ (cervical nerve), 01824ZZ (phrenic nerve), 01834ZZ (brachial plexus), 01854ZZ (median nerve), 01864ZZ (radial nerve) and 16 more.

The same procedure with a different approach is coded 01840ZZ (open) and 01843ZZ (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 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
8Division

Cutting into a body part, without draining fluids and/or gases from the body part, in order to separate or transect a body part

All or a portion of the body part is separated into two or more portions

Includes: Spinal cordotomy, osteotomy

4. Body Part
4Ulnar Nerve

Includes: Cubital 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.

ICD-9-CM equivalent

Converter →
  • 04.03Division or crushing of other cranial and peripheral nervesapproximate

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 01844ZZ

Is 01844ZZ a valid ICD-10-PCS code for 2027?

Yes. 01844ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 01844ZZ an O.R. procedure?

Yes. 01844ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 01844ZZ group to?

Depending on the principal diagnosis, 01844ZZ 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 01844ZZ?

The CMS GEMs map 01844ZZ to ICD-9-CM 04.03 (Division or crushing of other cranial and peripheral nerves).