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ICD-10-PCS 2027 procedure code

0KNR0ZZRelease Left Upper Leg Muscle, Open 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 0KNR0ZZ

0KNR0ZZ is the ICD-10-PCS code for a release procedure on the left upper leg muscle using an open 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 adhesions of muscle, tendon, fascia, and bursa, the ICD-9-CM procedure title it maps to (83.91).

For a different body part, codes include 0KN00ZZ (head muscle), 0KN10ZZ (facial muscle), 0KN20ZZ (right neck muscle), 0KN30ZZ (left neck muscle), 0KN40ZZ (tongue, palate, pharynx muscle), 0KN50ZZ (right shoulder muscle) and 21 more.

The same procedure with a different approach is coded 0KNR3ZZ (percutaneous), 0KNR4ZZ (percutaneous endoscopic) and 0KNRXZZ (external).

It is an operating-room procedure in the MS-DRG logic for DRG 500 (Soft Tissue Procedures with MCC), DRG 501 (Soft Tissue Procedures with CC) and DRG 502 (Soft Tissue Procedures without CC/MCC), under the surgical category “Soft Tissue 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
KMuscles
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
RUpper Leg Muscle, Left

Includes: Adductor brevis muscle; Adductor longus muscle; Adductor magnus muscle; Biceps femoris muscle; Gracilis muscle; Hamstring muscle; Pectineus muscle; Quadriceps (femoris); Rectus femoris muscle; Sartorius muscle; Semimembranosus muscle; Semitendinosus muscle; Vastus intermedius muscle; Vastus lateralis muscle; Vastus medialis muscle

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
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.

MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue · Soft Tissue Procedures

ICD-9-CM equivalent

Converter →
  • 83.91Lysis of adhesions of muscle, tendon, fascia, and bursaapproximate

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 0KNR0ZZ

Is 0KNR0ZZ a valid ICD-10-PCS code for 2027?

Yes. 0KNR0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0KNR0ZZ an O.R. procedure?

Yes. 0KNR0ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0KNR0ZZ group to?

Depending on the principal diagnosis, 0KNR0ZZ can group to MS-DRG 500, MS-DRG 501 and MS-DRG 502.

What is the ICD-9 procedure code for 0KNR0ZZ?

The CMS GEMs map 0KNR0ZZ to ICD-9-CM 83.91 (Lysis of adhesions of muscle, tendon, fascia, and bursa).