ICD-10 Code D44.2 – Neoplasm of uncertain behavior of parathyroid gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D44.2 – Neoplasm of uncertain behavior of parathyroid gland
What it is
D44.2 identifies a parathyroid gland mass whose behavior is uncertain, meaning pathology or clinical findings do not clearly show benign or malignant nature. Use it when the documentation specifically states uncertain behavior.
Clinical signs
Clinical features vary; refer to documentation. Findings may include an incidental parathyroid lesion, enlargement, or a mass noted on imaging or pathology, but the code itself reflects uncertain biologic behavior, not a symptom pattern.
When to use this code
Use D44.2 when the provider documents a neoplasm of uncertain behavior involving the parathyroid gland. This applies after evaluation or pathology still leaves the lesion indeterminate. Code it only when the record clearly identifies the parathyroid as the site.
Do not use for
Do not use this code for benign parathyroid adenoma, malignant parathyroid tumor, or hyperparathyroidism without a neoplasm diagnosis. Check documentation if the site or behavior is not explicitly stated.
Coding tip
Verify both the gland and the “uncertain behavior” wording before assigning D44.2.