ICD-10-CM > E00-E89 > E20-E35 > E27 > E27.4 E27.4 Other and unspecified adrenocortical insufficiency Non-Billable/Non-Specific Type 1 Excludes adrenoleukodystrophy [Addison-Schilder] (E71.528)Waterhouse-Friderichsen syndrome (A39.1) Codes E27.40Unspecified adrenocortical insufficiencyE27.49Other adrenocortical insufficiency