E22: Hyperfunction of pituitary gland
Codes under E22 (Hyperfunction of pituitary gland). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| E22.0 | Acromegaly and pituitary gigantism | ✓ |
| E22.0 | Acromegaly and pituitary gigantism | ✓ |
| E22.1 | Hyperprolactinemia | ✓ |
| E22.1 | Hyperprolactinemia | ✓ |
| E22.2 | Syndrome of inappropriate secretion of antidiuretic hormone | ✓ |
| E22.2 | Syndrome of inappropriate secretion of antidiuretic hormone | ✓ |
| E22.8 | Other hyperfunction of pituitary gland | ✓ |
| E22.8 | Other hyperfunction of pituitary gland | ✓ |
| E22.9 | Hyperfunction of pituitary gland, unspecified | ✓ |
| E22.9 | Hyperfunction of pituitary gland, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code E22?
E22 is an ICD-10-CM category covering Hyperfunction of pituitary gland. It contains 10 more specific diagnosis codes, 10 of which are billable.
Is E22 a billable code?
No — E22 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example E22.0 — Acromegaly and pituitary gigantism). 10 of the 10 codes under E22 are billable.
What codes fall under E22?
E22 includes E22.0, E22.0, E22.1, E22.1, E22.2, plus 5 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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