Malignant neoplasm of thyroid gland (C73)
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.
Neoplasms (C00–D49)
Malignant neoplasms of thyroid and other endocrine glands (C73-C75)
- C73 Malignant neoplasm of thyroid gland
Malignant neoplasm of thyroid gland (C73)
Instructional Notations
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