ICD-10-CM 2027
ICD-10 code for corticoadrenal deficiency
From the official ICD-10-CM alphabetic index entry “Deficiency, deficient › corticoadrenal”. Page updated September 29, 2026.
About coding corticoadrenal deficiency
The ICD-10-CM code for corticoadrenal deficiency is E27.40 (Unspecified adrenocortical insufficiency). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on E27.40.
Within E27.4, choose E27.40 (Unspecified adrenocortical insufficiency) only when documentation doesn't support a more specific option: other adrenocortical insufficiency (E27.49).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific corticoadrenal deficiency codes (official index)
- primary E27.1 — Primary adrenocortical insufficiency
Common questions about corticoadrenal deficiency ICD-10 codes
What is the ICD-10 code for corticoadrenal deficiency?
- E27.40 — Unspecified adrenocortical insufficiency. More specific codes apply when the documentation supports them: E27.1.
What is the ICD-10 code for primary corticoadrenal deficiency?
- E27.1 — Primary adrenocortical insufficiency.
Is E27.40 billable?
- Yes. E27.40 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E27.40 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E27.40 as a principal diagnosis.
Is E27.40 a CC or MCC?
- E27.40 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.