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ICD-10-CM 2027 diagnosis code

M50.221Other cervical disc displacement at C4-C5 level

✓ Billable / specific

M50.221 is a valid, billable ICD-10-CM code for other cervical disc displacement at c4-c5 level. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M50.221

M50.221 is the ICD-10-CM diagnosis code for other cervical disc displacement at C4-C5 level. It belongs to category M50 (cervical disc disorders), block M50-M54 (other dorsopathies) 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 M50.22 (other cervical disc displacement, mid-cervical region), M50.221 is specifically for other cervical disc displacement at C4-C5 level. Related codes cover unspecified level (M50.220), displacement at C5-C6 level (M50.222) and displacement at C6-C7 level (M50.223).

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 551 (Medical Back Problems with MCC, relative weight 1.6358) and DRG 552 (Medical Back Problems without MCC, relative weight 0.9584), 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 was added in FY2017, effective October 1, 2016.

Before ICD-10, this condition was coded in ICD-9-CM as 722.0 (displacement of cervical intervertebral disc without myelopathy).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Other C4-C5 cervical disc displacement

Notes that apply from higher levels

Instructions written at a parent level also apply to M50.221.

› From M50 Cervical disc disorders
Includes
  • cervicothoracic disc disorders with cervicalgia
  • cervicothoracic disc disorders

Broader instructions also apply from M50-M54 Other dorsopathies and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to M50.221.

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.

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

ICD-9-CM equivalent

Converter →
  • 722.0Displacement of cervical intervertebral disc without myelopathyapproximate

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
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about M50.221

Is M50.221 billable?

Yes. M50.221 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M50.221 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M50.221 as a principal diagnosis.

Is M50.221 a CC or MCC?

No. M50.221 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M50.221 group to?

M50.221 is used in the MS-DRG v44.0 logic for MS-DRG 551 (Medical Back Problems with MCC) and MS-DRG 552 (Medical Back Problems 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 M50.221?

The CMS General Equivalence Mappings map M50.221 to ICD-9-CM 722.0.