ICD-10-CM > C00-D49 > D37-D48 > D44 > D44.1 D44.1 Neoplasm of uncertain behavior of adrenal gland Non-Billable/Non-Specific Use Additional code to identify any functional activity. Codes D44.10Neoplasm of uncertain behavior of unspecified adrenal glandD44.11Neoplasm of uncertain behavior of right adrenal glandD44.12Neoplasm of uncertain behavior of left adrenal gland