Diseases of myoneural junction and muscle (G70-G73)

ICD-10 codes G70-G73 cover diseases affecting the myoneural junction and muscles, including various myopathies and neuromuscular disorders. These codes detail conditions like myasthenia gravis, muscular dystrophies, myotonic disorders, congenital myopathies, and other muscle-related diseases, helping healthcare professionals precisely classify and diagnose these complex disorders.

This ICD-10 range includes G70 for myasthenia gravis and related myoneural disorders, distinguishing between acute exacerbations and remission. Codes such as G71 describe primary muscle disorders like muscular dystrophies, including Duchenne and Becker types, and the facioscapulohumeral form. The chapter also covers myotonic disorders under G71.1, like myotonic muscular dystrophy and drug-induced myotonia. Congenital myopathies and mitochondrial myopathies are categorized under G71.2 and G71.3 respectively, encompassing conditions such as nemaline and centronuclear myopathies. G72 codes encompass other myopathies including drug-induced and alcoholic myopathy, while G73 addresses myoneural junction and muscle disorders secondary to other diseases, such as Lambert-Eaton syndrome related to cancer. Synonyms like "Myasthenic crisis" for G70.01 or "Steinert myotonic dystrophy" for G71.11 help clarify coding choices when alternative terms are encountered.