Skip to content
Dx

ICD-10-CM 2027 diagnosis code

M22.2X2Patellofemoral disorders, left knee

✓ Billable / specific

M22.2X2 is a valid, billable ICD-10-CM code for patellofemoral disorders, left knee. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M22.2X2

M22.2X2 is the ICD-10-CM diagnosis code for Patellofemoral disorders, left knee. It belongs to category M22 (disorder of patella), block M20-M25 (other joint disorders) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M22.2X (Patellofemoral disorders), M22.2X2 is specifically for Patellofemoral disorders, left knee. Related codes cover right knee (M22.2X1) and unspecified knee (M22.2X9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 562 (Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh with MCC, relative weight 1.398) and DRG 563 (Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh without MCC, relative weight 0.8985), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 717.89 (other internal derangement of knee).

Notes that apply from higher levels

Instructions written at a parent level also apply to M22.2X2.

› From M22 Disorder of patella
Excludes2
  • traumatic dislocation of patella (S83.0-)

Broader instructions also apply from M20-M25 Other joint disorders and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 717.89Other internal derangement of kneeapproximate

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 M22.2X2

Is M22.2X2 billable?

Yes. M22.2X2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M22.2X2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M22.2X2 as a principal diagnosis.

Is M22.2X2 a CC or MCC?

No. M22.2X2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M22.2X2 group to?

M22.2X2 is used in the MS-DRG v44.0 logic for MS-DRG 562 (Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh with MCC) and MS-DRG 563 (Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for M22.2X2?

The CMS General Equivalence Mappings map M22.2X2 to ICD-9-CM 717.89.