Alphabetic Index FY2027

M60.1

Interstitial myositis

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M60–M63 Disorders of muscles

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

M60.1 is a non-billable ICD-10-CM code header for interstitial myositis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are M60.10 Interstitial myositis of unspecified site; M60.11 Interstitial myositis, shoulder; M60.12 Interstitial myositis, upper arm; M60.13 Interstitial myositis, forearm and 6 more. Its coding notes include 7 Excludes1 entries and 12 Excludes2 entries.

Excludes1

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

Also from chapter/block level (7 notes)
Inherited from M60–M63 Disorders of muscles
  • dermatopolymyositis (M33.-)
  • myopathy in amyloidosis (E85.-)
  • myopathy in polyarteritis nodosa (M30.0)
  • myopathy in rheumatoid arthritis (M05.32)
  • myopathy in scleroderma (M34.-)
  • myopathy in Sjögren's syndrome (M35.03)
  • myopathy in systemic lupus erythematosus (M32.-)

Excludes2

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

Inherited from M60 Myositis
  • inclusion body myositis [IBM] (G72.41)
Also from chapter/block level (11 notes)
Inherited from M60–M63 Disorders of muscles
  • muscular dystrophies and myopathies (G71-G72)
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)

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

More specific codes under M60.1 10