Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes G00-G99 – Diseases of the nervous system (G00-G99) > 2024 ICD-10-CM Codes G70-G73 – Diseases of myoneural junction and muscle (G70-G73) > 2024 ICD-10-CM Codes G71 – Primary disorders of muscles (G71) > 2024 ICD-10-CM Codes G71.1 – Myotonic disorders (G71.1)