Malignant neoplasm of thyroid gland (C73) ICD-10-CM
The C73 code range covers malignant neoplasm of thyroid gland with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
- code to identify any functional activity
Codes in the C73 Range 1 codes · 1 billable
- C73 Malignant neoplasm of thyroid gland
About the C73 Code Range
The ICD-10 code C73 is used specifically for documenting malignant neoplasms of the thyroid gland, which are cancerous tumors originating in this endocrine organ.
This code covers a variety of thyroid cancers, including well-known types such as papillary thyroid carcinoma, follicular thyroid carcinoma, and medullary thyroid carcinoma. It also encompasses less common forms like anaplastic thyroid carcinoma, Hurthle cell carcinoma, and oxyphilic adenocarcinoma. When medical coders encounter records referring to terms like "primary differentiated carcinoma of the thyroid gland," "diffuse sclerosing papillary thyroid carcinoma," or "thyroglossal duct neoplasm," selecting C73 provides the correct classification. This ICD-10 code is essential for tracking, reporting, and analyzing thyroid cancers accurately, helping healthcare professionals identify malignant conditions that arise specifically in thyroid tissues rather than from other sources. In short, the ICD-10 code for malignant thyroid neoplasm ensures precise coding for a range of thyroid gland cancers, from common papillary types to rare variants.
Questions About This Page
How many billable codes are in the C73 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the C73 range classify?
The range classifies malignant neoplasm of thyroid gland. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
