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ICD-10-PCS 2027 procedure code

01WY02ZRevision of Monitoring Device in Peripheral Nerve, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Revision of Monitoring Device in Periph Nrv, Open 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 01WY02Z

01WY02Z is the ICD-10-PCS code for a revision procedure on the peripheral nerve using an open approach with monitoring device. In ICD-10-PCS, revision means correcting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device.

In plain terms, this corresponds to other incision of cranial and peripheral nerves and other operations on sympathetic nerves or ganglia, the ICD-9-CM procedure titles it maps to (04.04 and 05.89).

The same procedure with a different approach is coded 01WY32Z (percutaneous), 01WY42Z (percutaneous endoscopic) and 01WYX2Z (external).

With a different device, use 01WY00Z (drainage device), 01WY07Z (autologous tissue substitute), 01WY0MZ (neurostimulator lead) and 01WY0YZ (other device).

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
WRevision

Correcting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device

Revision can include correcting a malfunctioning or displaced device by taking out or putting in components of the device such as a screw or pin

Includes: Adjustment of position of pacemaker lead, recementing of hip prosthesis

4. Body Part
YPeripheral Nerve
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
2Monitoring Device

Includes: Blood glucose monitoring system; Cardiac event recorder; Continuous Glucose Monitoring (CGM) device; Implantable glucose monitoring device; Loop recorder, implantable; Reveal (LINQ)(DX)(XT)

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 →
  • 04.04Other incision of cranial and peripheral nervesapproximate
  • 05.89Other operations on sympathetic nerves or gangliaapproximate

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 01WY02Z

Is 01WY02Z a valid ICD-10-PCS code for 2027?

Yes. 01WY02Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 01WY02Z an O.R. procedure?

Yes. 01WY02Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 01WY02Z group to?

Depending on the principal diagnosis, 01WY02Z can group to MS-DRG 040, MS-DRG 041 and MS-DRG 042.

What is the ICD-9 procedure code for 01WY02Z?

The CMS GEMs map 01WY02Z to ICD-9-CM 04.04 (Other incision of cranial and peripheral nerves) and 05.89 (Other operations on sympathetic nerves or ganglia).