Is ICD-10-CM code E31 billable?

No, E31 (Polyglandular dysfunction) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code E31 belong to?

E31 belongs to Chapter 4 of the ICD-10-CM tabular list: E00–E89 (Endocrine, Nutritional and Metabolic Diseases).

E31Non-billable

Polyglandular dysfunction

Endocrine, Nutritional and Metabolic Diseases·Disorders of other endocrine glands (E20-E35)·category·FY 2026

Use a more specific code (4 billable, 1 non-billable)

E31.0Autoimmune polyglandular failure E31.1Polyglandular hyperfunction E31.2Multiple endocrine neoplasia [MEN] syndromeshas subcodes E31.8Other polyglandular dysfunction E31.9Polyglandular dysfunction, unspecified

CH4 Parent Instructions

Excludes1(Not coded here. Use a different code.)

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

E20-E35 Parent Instructions

Excludes1(Not coded here. Use a different code.)

galactorrhea (N64.3)
gynecomastia (N62)

Instructional Notes

Excludes1(Not coded here. Use a different code.)

ataxia telangiectasia [Louis-Bar] (G11.3)
dystrophia myotonica [Steinert] (G71.11)
pseudohypoparathyroidism (E20.1)

Clinical Hierarchy

BillableHas subcodes

CH4Endocrine, nutritional and metabolic diseases (E00-E89)

E20-E35Disorders of other endocrine glands (E20-E35)

E31Polyglandular dysfunctionNot billable

E31.0Autoimmune polyglandular failureBillable

E31.1Polyglandular hyperfunctionBillable

E31.2Multiple endocrine neoplasia [MEN] syndromesSubcodes

E31.8Other polyglandular dysfunctionBillable

E31.9Polyglandular dysfunction, unspecifiedBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.