Alphabetic Index FY2027

M50.821

Other cervical disc disorders at C4-C5 level

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M50–M54 Other dorsopathies

BillableComplete code, valid to report
Care settingsHome Health Primary · Musculoskeletal Rehabilitation

M50.821 (also written M50821) is a billable ICD-10-CM diagnosis code for other cervical disc disorders at C4-C5 level. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 42 codes in category M50 (Cervical disc disorders). The Alphabetic Index lists it under 1 entry. Its coding notes include 2 Excludes1 entries and 10 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Also from chapter/block level (2 notes)
Inherited from M50–M54 Other dorsopathies
  • current injury - see injury of spine by body region
  • discitis NOS (M46.4-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (10 notes)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the Musculoskeletal Rehabilitation clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Includes

Further defines or gives examples of the content of the category.

Inherited from M50 Cervical disc disorders
  • cervicothoracic disc disorders with cervicalgia
  • cervicothoracic disc disorders

Inclusion terms

Conditions classified to this code.

This code
  • Other C4-C5 cervical disc disorders

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 1 entry