ICD-10-CM > G00-G99 > G50-G59 > G59 G59 Mononeuropathy in diseases classified elsewhere Billable/Specific Copy Code Copy Description Code First underlying disease Type 1 Excludes diabetic mononeuropathy (E08-E13 with .41)syphilitic nerve paralysis (A52.19)syphilitic neuritis (A52.15)tuberculous mononeuropathy (A17.83)