E31
⚠ Non-billable
Polyglandular dysfunction
ICD-10-CM · FY2026 · Endocrine, Nutritional and Metabolic Diseases
Code
E31
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Endocrine, Nutritional and Metabolic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- ataxia telangiectasia [Louis-Bar] (G11.3)
- dystrophia myotonica [Steinert] (G71.11)
- pseudohypoparathyroidism (E20.1)
Frequently asked questions
What is ICD-10 code E31?
ICD-10-CM code E31 represents Polyglandular dysfunction. It is a non-billable header code requiring a more specific subcategory in the Endocrine, Nutritional and Metabolic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is E31 billable?
No. E31 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is E31 in?
E31 belongs to the Endocrine, Nutritional and Metabolic Diseases chapter (E00–E89) of ICD-10-CM.
Related codes in the E31 category
E31.0
Autoimmune polyglandular failure
Billable
E31.1
Polyglandular hyperfunction
Billable
E31.2
Multiple endocrine neoplasia [MEN] syndromes
Non-billable
E31.8
Other polyglandular dysfunction
Billable
E31.9
Polyglandular dysfunction, unspecified
Billable
E31.20
Multiple endocrine neoplasia [MEN] syndrome, unspecified
Billable
E31.21
Multiple endocrine neoplasia [MEN] type I
Billable
E31.22
Multiple endocrine neoplasia [MEN] type IIA
Billable
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