ICD-10 Code E22.8 – Other hyperfunction of pituitary gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E22.8 – Other hyperfunction of pituitary gland
What it is
E22.8 identifies pituitary overactivity that does not fit a more specific ICD-10 category. Use it when documentation shows excess pituitary hormone production or hyperfunction, but the exact disorder is not named.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect hormone excess from the pituitary gland, and the chart should support a hyperfunction diagnosis rather than a nonspecific endocrine complaint.
When to use this code
Use E22.8 when the provider documents other pituitary hyperfunction and no more specific pituitary disorder applies. It is appropriate for confirmed pituitary overactivity that is not coded elsewhere in E22 or another endocrine category. Check documentation if the record only mentions pituitary abnormality without hyperfunction.
Do not use for
Do not use this code for pituitary hypofunction, pituitary tumors without documented hyperfunction, or disorders with a more specific ICD-10 code. If the diagnosis is uncertain, check documentation.
Coding tip
Code the documented pituitary hyperfunction only after confirming that a more specific pituitary diagnosis is not available.