C80.1 – Malignant (primary) neoplasm, unspecified | ICD-10-CM

C80.1 – Malignant (primary) neoplasm, unspecified | ICD-10-CM

Understand the significance, usage, and clinical context of the ICD-10-CM code C80.1 in this comprehensive guide.

By Patricia Buenaventura on Aug 8, 2025.

Fact Checked by Karina Jimenea.

Use Code

Commonly asked questions

No, they are not the same. A neoplasm may be benign or malignant, while cancer refers to malignant neoplasms.

C80.1 is utilized when a patient presents with a primary malignant neoplasm, but the exact characteristics or origin of the tumor are unclear. This code is often used when initial diagnostic information is limited.

An unspecified malignant neoplasm is a cancerous tumor wherein the source or the original location is unknown.

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