E34.2 Ectopic hormone secretion, not elsewhere classified

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• ectopic ACTH syndrome (E24.3)

Applies from E34 Other endocrine disorders

Excludes1 (never code together)

• pseudohypoparathyroidism (E20.1)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 259.3 Ectopic hormone secretion, not elsewhere classified

Code annotations containing back-references to E34.2

Back-references to E34.2

• Type 1 Excludes: E21 Hyperparathyroidism and other disorders of parathyroid gland ("ectopic hyperparathyroidism (E34.2)")

Back-references to E34

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

Diagnosis Index entries for E34.2

• Ectopic, ectopia (congenital) › hormone secretion NEC
• Secretion › hormone › ectopic NEC

Nearby codes

• E34.0 Carcinoid syndrome
• E34.00 Carcinoid syndrome, unspecified
• E34.01 Carcinoid heart syndrome
• E34.09 Other carcinoid syndrome
• E34.1 Other hypersecretion of intestinal hormones
• E34.2 Ectopic hormone secretion, not elsewhere classified (this code)
• E34.3 Short stature due to endocrine disorder
• E34.30 Short stature due to endocrine disorder, unspecified
• E34.31 Constitutional short stature
• E34.32 Genetic causes of short stature
• E34.321 Primary insulin-like growth factor-1 (IGF-1) deficiency