E26.01 Conn's syndrome

Billable ICD-10-CM code, FY2026.

Code also

• adrenal adenoma (D35.0-)

Risk adjustment (HCC)

• 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)

• 255.12 Conn's syndrome

Code annotations containing back-references to E26.01

Back-references to E26

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

Diagnosis Index entries for E26.01

• Conn's syndrome
• Syndrome › Conn's

Nearby codes

• E26 Hyperaldosteronism
• E26.0 Primary hyperaldosteronism
• E26.01 Conn's syndrome (this code)
• E26.02 Glucocorticoid-remediable aldosteronism
• E26.09 Other primary hyperaldosteronism
• E26.1 Secondary hyperaldosteronism
• E26.8 Other hyperaldosteronism
• E26.81 Bartter's syndrome