Coding and coverage · ICD-10-CM

G70 Myasthenia gravis and other myoneural disorders

Not billable (header)Chapter 6

Report one of the more specific codes below.

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Codes under this one

  • G70.0 Myasthenia gravisHeader
  • G70.1 Toxic myoneural disorders
  • G70.2 Congenital and developmental myasthenia
  • G70.8 Other specified myoneural disordersHeader
  • G70.9 Myoneural disorder, unspecified

Instructional notes

Chapter 6

Excludes2Not included here: the patient may have both; report both when both are present.
  • 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)

This code

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

Chapter 6: Diseases of the nervous system · G70-G73 Diseases of myoneural junction and muscle (G70-G73)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.