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ICD-10-PCS 2027 procedure code

0UNMXZZRelease Vulva, External Approach

✓ Valid for 2027O.R. procedureFemale only

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 0UNMXZZ

0UNMXZZ is the ICD-10-PCS code for a release procedure on the vulva using an external 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 lysis of vulvar adhesions, the ICD-9-CM procedure title it maps to (71.01).

For a different body part, codes include 0UNGXZZ (vagina), 0UNJXZZ (clitoris), 0UNKXZZ (hymen) and 0UNLXZZ (vestibular gland).

The same procedure with a different approach is coded 0UNM0ZZ (open).

It is an operating-room procedure in the MS-DRG logic for DRG 746 (Vagina, Cervix and Vulva Procedures with CC/MCC), DRG 747 (Vagina, Cervix and Vulva Procedures without CC/MCC), DRG 907 (Other O.R. Procedures for Injuries with MCC), DRG 908 (Other O.R. Procedures for Injuries with CC), DRG 909 (Other O.R. Procedures for Injuries without CC/MCC) and DRG 957 (Other O.R. Procedures for Multiple Significant Trauma with MCC), under the surgical categories “Vagina, Cervix and Vulva Procedures”, “Other O.R. Procedures for Injuries” and “Other O.R. Procedures for Multiple Significant Trauma”.

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
UFemale Reproductive 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
MVulva

Includes: Labia majora; Labia minora

5. Approach
XExternal

Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane

6. Device
ZNo Device
7. Qualifier
ZNo Qualifier

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.

MDC 13 · Diseases and Disorders of the Female Reproductive System · Vagina, Cervix and Vulva Procedures

ICD-9-CM equivalent

Converter →
  • 71.01Lysis of vulvar 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 0UNMXZZ

Is 0UNMXZZ a valid ICD-10-PCS code for 2027?

Yes. 0UNMXZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0UNMXZZ an O.R. procedure?

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

What DRG does 0UNMXZZ group to?

Depending on the principal diagnosis, 0UNMXZZ can group to MS-DRG 746, MS-DRG 747, MS-DRG 907, MS-DRG 908, MS-DRG 909 and MS-DRG 957.

What is the ICD-9 procedure code for 0UNMXZZ?

The CMS GEMs map 0UNMXZZ to ICD-9-CM 71.01 (Lysis of vulvar adhesions).