All ICD10 Codes
Chapter 4

E00–E89: Endocrine, Nutritional and Metabolic Diseases

Endocrine, Nutritional and Metabolic Diseases diagnostic classification updated for 2026.

Chapter Instructions

Excludes1(Not coded here. Use a different code.)
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)
All CodesBillable Only
Internal Codes
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  • E16.3—

    Increased secretion of glucagon

  • E16.4—

    Increased secretion of gastrin

  • E16.8—

    Other specified disorders of pancreatic internal secretion

  • E16.9—

    Disorder of pancreatic internal secretion, unspecified

  • E16.A—

    Hypoglycemia level

  • E16.A1—

    Hypoglycemia level 1

  • E16.A2—

    Hypoglycemia level 2

  • E16.A3—

    Hypoglycemia level 3

  • E20—

    Hypoparathyroidism

  • E20.0—

    Idiopathic hypoparathyroidism

  • E20.1—

    Pseudohypoparathyroidism

  • E20.8—

    Other hypoparathyroidism

  • E20.81—

    Hypoparathyroidism due to impaired parathyroid hormone secretion

  • E20.810—

    Autosomal dominant hypocalcemia

  • E20.811—

    Secondary hypoparathyroidism in diseases classified elsewhere

  • E20.812—

    Autoimmune hypoparathyroidism

  • E20.818—

    Other specified hypoparathyroidism due to impaired parathyroid hormone secretion

  • E20.819—

    Hypoparathyroidism due to impaired parathyroid hormone secretion, unspecified

  • E20.89—

    Other specified hypoparathyroidism

  • E20.9—

    Hypoparathyroidism, unspecified

  • E21—

    Hyperparathyroidism and other disorders of parathyroid gland

  • E21.0—

    Primary hyperparathyroidism

  • E21.1—

    Secondary hyperparathyroidism, not elsewhere classified

  • E21.2—

    Other hyperparathyroidism

  • E21.3—

    Hyperparathyroidism, unspecified

  • E21.4—

    Other specified disorders of parathyroid gland

  • E21.5—

    Disorder of parathyroid gland, unspecified

  • E22—

    Hyperfunction of pituitary gland

  • E22.0—

    Acromegaly and pituitary gigantism

  • E22.1—

    Hyperprolactinemia

  • E22.2—

    Syndrome of inappropriate secretion of antidiuretic hormone

  • E22.8—

    Other hyperfunction of pituitary gland

  • E22.9—

    Hyperfunction of pituitary gland, unspecified

  • E23—

    Hypofunction and other disorders of the pituitary gland

  • E23.0—

    Hypopituitarism

  • E23.1—

    Drug-induced hypopituitarism

  • E23.2—

    Diabetes insipidus

  • E23.3—

    Hypothalamic dysfunction, not elsewhere classified

  • E23.6—

    Other disorders of pituitary gland

  • E23.7—

    Disorder of pituitary gland, unspecified

  • E24—

    Cushing's syndrome

  • E24.0—

    Pituitary-dependent Cushing's disease

  • E24.1—

    Nelson's syndrome

  • E24.2—

    Drug-induced Cushing's syndrome

  • E24.3—

    Ectopic ACTH syndrome

  • E24.4—

    Alcohol-induced pseudo-Cushing's syndrome

  • E24.8—

    Other Cushing's syndrome

  • E24.9—

    Cushing's syndrome, unspecified

  • E25—

    Adrenogenital disorders

  • E25.0—

    Congenital adrenogenital disorders associated with enzyme deficiency

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