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ICD-10-PCS 2027 procedure code

01X44Z4Transfer Ulnar Nerve to Ulnar Nerve, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Transfer Ulnar Nerve to Ulnar Nerve, Perc Endo Approach

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 01X44Z4

01X44Z4 is the ICD-10-PCS code for a transfer procedure on the ulnar nerve using a percutaneous endoscopic approach (qualifier: ulnar nerve). In ICD-10-PCS, transfer means moving, without taking out, all or a portion of a body part to another location to take over the function of all or a portion of a body part.

In plain terms, this corresponds to other anastomosis of cranial or peripheral nerve, the ICD-9-CM procedure title it maps to (04.74).

For a different body part, codes include 01X54Z4 (median nerve) and 01X64Z4 (radial nerve).

The same procedure with a different approach is coded 01X40Z4 (open).

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) and DRG 042 (Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC), under the surgical category “Peripheral, Cranial Nerve and Other Nervous System 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
1Peripheral Nervous System
3. Operation
XTransfer

Moving, without taking out, all or a portion of a body part to another location to take over the function of all or a portion of a body part

The body part transferred remains connected to its vascular and nervous supply

Includes: Tendon transfer, skin pedicle flap transfer

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
4Ulnar Nerve

Other versions of this procedure

Different approach

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 →
  • 04.74Other anastomosis of cranial or peripheral nerveapproximate

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 01X44Z4

Is 01X44Z4 a valid ICD-10-PCS code for 2027?

Yes. 01X44Z4 is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 01X44Z4 an O.R. procedure?

Yes. 01X44Z4 is an O.R. procedure in MS-DRG v44.0.

What DRG does 01X44Z4 group to?

Depending on the principal diagnosis, 01X44Z4 can group to MS-DRG 040, MS-DRG 041 and MS-DRG 042.

What is the ICD-9 procedure code for 01X44Z4?

The CMS GEMs map 01X44Z4 to ICD-9-CM 04.74 (Other anastomosis of cranial or peripheral nerve).