D35.2

HCC Category Mapping

What This Code Means

A noncancerous tumor of the pituitary gland, a small gland at the base of the brain that controls many hormones in the body.

Coding Tips

• •Pituitary adenomas are the most common benign brain tumor; confirm benign status and document any hormone-secreting properties
• •Note whether the tumor is functioning (hormone-secreting) or non-functioning, as this may affect clinical management

Clinical Significance

Benign neoplasm of the pituitary gland, most commonly a pituitary adenoma, is the most prevalent intracranial tumor type, found incidentally in up to 20% of brain imaging studies. These tumors may be functioning (hormone-secreting, causing syndromes like acromegaly, Cushing disease, or prolactinoma) or non-functioning. Their clinical significance depends on size, hormone production, and compression of adjacent structures like the optic chiasm.

Documentation Requirements

• ✓MRI of the sella turcica documenting the pituitary lesion with size classification (microadenoma less than 10mm vs.
• ✓macroadenoma 10mm or greater).
• ✓Comprehensive hormonal evaluation including prolactin, growth hormone, IGF-1, ACTH, cortisol, TSH, and gonadotropins should be documented.
• ✓Visual field testing results for macroadenomas approaching the optic chiasm are essential.
• ✓Note whether the adenoma is functioning or non-functioning.

Commonly Confused Codes