E31.9 – Polyglandular dysfunction, unspecified

ICD-10-CM 2027 diagnosis code · Disorders of other endocrine glands

Billable code

ICD-10-CM code E31.9

Code: E31.9 (claims format: E319)
Description: Polyglandular dysfunction, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 4. Endocrine, nutritional and metabolic diseases (E00-E89)
Block: E20-E35 Disorders of other endocrine glands
Parent codes: E31

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

E31 – Polyglandular dysfunction

Excludes1 (not coded here):

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

Block E20-E35

Excludes1 (not coded here):

galactorrhea (N64.3)
gynecomastia (N62)

Index terms for E31.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in E31

E31.0 – Autoimmune polyglandular failureBillable
E31.1 – Polyglandular hyperfunctionBillable
E31.2 – Multiple endocrine neoplasia [MEN] syndromesHeader
E31.8 – Other polyglandular dysfunctionBillable

Frequently asked questions

What is ICD-10 code E31.9?

E31.9 is the ICD-10-CM code for polyglandular dysfunction, unspecified, in the block E20-E35 (Disorders of other endocrine glands).

Is E31.9 a billable code?

Yes. E31.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does E31.9 belong to?

It belongs to category E31 – Polyglandular dysfunction.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.