ICD-10 Code D44.12 – Neoplasm of uncertain behavior of left adrenal gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D44.12 – Neoplasm of uncertain behavior of left adrenal gland
What it is
This code identifies a left adrenal gland mass whose behavior is uncertain, meaning pathology or documentation does not confirm whether it is benign or malignant. Use it for adrenal lesions that need further evaluation.
Clinical signs
Clinical features vary; refer to documentation. Adrenal masses may be found incidentally on imaging or during workup for hormone-related symptoms, pain, or compression findings.
When to use this code
Use D44.12 when the provider documents a neoplasm of uncertain behavior in the left adrenal gland. It also fits cases described as an indeterminate adrenal mass or lesion when the left side is clearly identified. If the record instead states a confirmed benign or malignant tumor, code that diagnosis.
Do not use for
Do not use this code for a clearly benign adrenal adenoma or a confirmed adrenal cancer. If the documentation does not specify the left adrenal gland, check documentation before assigning laterality.
Coding tip
Verify both behavior and laterality in the provider note, imaging report, or pathology report before assigning D44.12.