ICD-10 Code C75.0 – Malignant neoplasm of parathyroid gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C75.0 – Malignant neoplasm of parathyroid gland
What it is
C75.0 identifies a malignant tumor arising in the parathyroid gland. Use it when the record documents cancer of the parathyroid, not a benign parathyroid disorder.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a neck mass or findings related to abnormal parathyroid hormone production, but coding depends on the confirmed malignant diagnosis.
When to use this code
Use C75.0 when the provider documents primary malignancy of the parathyroid gland, including pathology-confirmed cancer. It also applies when the chart clearly states malignant neoplasm of the parathyroid without naming another primary site.
Code the documented primary site as written and follow any sequencing instructions in the record. If the note only mentions a parathyroid mass, lesion, or hyperparathyroidism, check documentation before assigning this code.
Do not use for
Do not use C75.0 for benign parathyroid adenoma, hyperplasia, or unspecified parathyroid disease. Do not use it when the malignancy is metastatic to the parathyroid from another primary site.
Coding tip
Confirm the pathology or provider statement names the parathyroid gland as the malignant primary site before you assign C75.0.