Alphabetic Index FY2027

M79.9

Soft tissue disorder, unspecified

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M70–M79 Other soft tissue disorders

BillableComplete code, valid to report

M79.9 (also written M799) is a billable ICD-10-CM diagnosis code for soft tissue disorder, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 52 codes in category M79 (Other and unspecified soft tissue disorders, not elsewhere classified). The Alphabetic Index lists it under 11 entries. Its coding notes include 2 Excludes1 entries and 10 Excludes2 entries.

Excludes1

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

Inherited from M79 Other and unspecified soft tissue disorders, not elsewhere classified
  • psychogenic rheumatism (F45.8)
  • soft tissue pain, psychogenic (F45.41)

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)

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. 11 entries