FY2027 ICD-10-CM reference
G70: Myasthenia gravis and other myoneural disorders
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Myasthenia gravis and other myoneural disorders. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- G70.0: Myasthenia gravisNonbillable heading
- G70.1: Toxic myoneural disordersBillable code
- G70.2: Congenital and developmental myastheniaBillable code
- G70.8: Other specified myoneural disordersNonbillable heading
- G70.9: Myoneural disorder, unspecifiedBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: G00-G99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: G00-G99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: G00-G99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: G00-G99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: G00-G99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: G00-G99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: G00-G99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: G00-G99 (chapter, inherited).
Excludes1
botulism (A05.1, A48.51-A48.52)
Source: G70 (category, direct).
Excludes1
transient neonatal myasthenia gravis (P94.0)
Source: G70 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does G70 mean in FY2027?
The official ICD-10-CM descriptor is Myasthenia gravis and other myoneural disorders. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is G70 billable in FY2027?
The FY2027 order file marks G70 as a nonbillable heading. Select a complete billable child code.
Does G70 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition