ICD-10 Code D44.1 – Neoplasm of uncertain behavior of adrenal gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D44.1 – Neoplasm of uncertain behavior of adrenal gland
What it is
D44.1 identifies a tumor of the adrenal gland whose behavior is not clearly benign or malignant. Use it when the record documents uncertain behavior or an indeterminate adrenal neoplasm.
Clinical signs
Clinical features vary; refer to documentation. Adrenal masses may be found incidentally or during evaluation for hormonal activity, pain, or mass effect, but the code depends on the documented behavior, not symptoms alone.
When to use this code
Use D44.1 when the provider documents an adrenal neoplasm with uncertain or borderline behavior, or pathology cannot clearly classify it as benign or malignant. It may apply after imaging, biopsy, or surgery when the final assessment remains indeterminate.
If the chart only says “adrenal mass” or “adrenal lesion,” check documentation and coding guidance before assigning this code. You should code the documented diagnosis, not the imaging finding alone.
Do not use for
Do not use D44.1 for clearly benign adrenal adenoma, malignant adrenal cancer, or unspecified adrenal mass without documented uncertain behavior. Check documentation if the pathology report is incomplete.
Coding tip
Confirm that “uncertain behavior” is explicitly documented before reporting D44.1.