G71.9

Primary disorder of muscle, unspecified

FY2027Chapter 6: Diseases of the nervous system/G70–G73 Diseases of myoneural junction and muscle

BillableComplete code, valid to report

G71.9 (also written G719) is a billable ICD-10-CM diagnosis code for primary disorder of muscle, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 28 codes in category G71 (Primary disorders of muscles). The Alphabetic Index lists it under 3 entries. Its coding notes include 11 Excludes2 entries.

Excludes2

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

Inherited from G71 Primary disorders of muscles
  • arthrogryposis multiplex congenita (Q74.3)
  • metabolic disorders (E70-E88)
  • myositis (M60.-)
Also from chapter/block level (8 notes)
Inherited from Chapter 6 Diseases of the nervous system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • 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)

Inclusion terms

Conditions classified to this code.

This code
  • Hereditary myopathy NOS

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 3 entries