ICD-10-CM > E00-E89 > E20-E35 > E31 E31 Polyglandular dysfunction Non-Billable/Non-Specific Type 1 Excludes ataxia telangiectasia [Louis-Bar] (G11.3)dystrophia myotonica [Steinert] (G71.11)pseudohypoparathyroidism (E20.1) Codes E31.0Autoimmune polyglandular failureE31.1Polyglandular hyperfunctionE31.2Multiple endocrine neoplasia [MEN] syndromesE31.20Multiple endocrine neoplasia [MEN] syndrome, unspecifiedE31.21Multiple endocrine neoplasia [MEN] type IE31.22Multiple endocrine neoplasia [MEN] type IIAE31.23Multiple endocrine neoplasia [MEN] type IIBE31.8Other polyglandular dysfunctionE31.9Polyglandular dysfunction, unspecified