E31.9 Polyglandular dysfunction, unspecified

Billable ICD-10-CM code, FY2026.

Applies from E31 Polyglandular dysfunction

Excludes1 (never code together)

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

Risk adjustment (HCC)

• CMS-HCC V28: HCC 51 — Addison's and Cushing's Diseases, Acromegaly, and Other Specified Endocrine Disorders
• CMS-HCC V22: HCC 23 — Other Significant Endocrine and Metabolic Disorders
• RxHCC V08: HCC 43 — Pituitary, Adrenal Gland, and Other Endocrine and Metabolic Disorders
• ESRD V24: HCC 23

MS-DRG index

Defines the logic of DRG(s) 643-645 in MDC 10.

Approximate ICD-9-CM (GEMs)

• 258.9 Polyglandular dysfunction, unspecified

Code annotations containing back-references to E31.9

Back-references to E31

• Code First: G63 Polyneuropathy in diseases classified elsewhere ("endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)")

Diagnosis Index entries for E31.9

• Disturbance (s) › polyglandular
• Dyscrasia › polyglandular, pluriglandular
• Dysfunction › polyglandular
• Endocrinopathy, pluriglandular
• Polyglandular › dyscrasia
• Polyglandular › dysfunction

Nearby codes

• E31.20 Multiple endocrine neoplasia [MEN] syndrome, unspecified
• E31.21 Multiple endocrine neoplasia [MEN] type I
• E31.22 Multiple endocrine neoplasia [MEN] type IIA
• E31.23 Multiple endocrine neoplasia [MEN] type IIB
• E31.8 Other polyglandular dysfunction
• E31.9 Polyglandular dysfunction, unspecified (this code)