Malignant neoplasm of fundus uteri

This code identifies a primary cancerous tumor originating in the fundus of the uterus. The fundus is the dome-shaped upper portion of the uterus, above the fallopian tube openings. This malignancy is typically a type of endometrial carcinoma.

Apply this code when documentation confirms a primary malignant neoplasm specifically located in the fundus of the uterus. This diagnosis is often established through biopsy and histopathological examination. Use this code for initial encounters, subsequent treatment, and follow-up for this specific uterine cancer.

• Ensure the documentation clearly specifies the fundus as the site of origin, not just "uterus, unspecified."
• Distinguish from other uterine body malignancies (e.g., C54.1 for endometrium, C54.2 for myometrium).
• Sequence as the primary diagnosis when it is the reason for the encounter or treatment.