ICD-10 Code D44.9 – Neoplasm of uncertain behavior of unspecified endocrine gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D44.9 – Neoplasm of uncertain behavior of unspecified endocrine gland
What it is
This code identifies a growth in an endocrine gland whose behavior is uncertain, meaning the record does not show whether it is benign or malignant. Use it when the gland is endocrine but the specific site is not documented.
Clinical signs
Clinical features vary; refer to documentation. The chart may describe an endocrine mass, incidental imaging finding, or a lesion awaiting pathology, but the specific gland and biologic behavior are not confirmed.
When to use this code
Use D44.9 when the provider documents an endocrine neoplasm of uncertain behavior and does not name the gland. It also fits when the site is described only as an unspecified endocrine gland in the assessment or pathology summary.
Choose this code only when the record supports uncertain behavior, such as pending or nondefinitive pathology. If the documentation later identifies a specific endocrine gland, code that more precise site instead.
Do not use for
Do not use this code for clearly benign or malignant endocrine tumors. Also avoid it when the affected gland is specified in the record, because a more exact code is usually available.
Coding tip
Check the pathology, imaging, and provider assessment together before assigning D44.9.