ICD-10 Code C54.3 – Malignant neoplasm of fundus uteri (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C54.3 – Malignant neoplasm of fundus uteri
What it is
This code identifies a malignant tumor arising in the fundus of the uterus, the upper portion of the uterine body. Use it when documentation specifically names the fundus as the primary site.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include abnormal uterine bleeding, pelvic pain, or an imaging or biopsy report confirming a malignant uterine mass.
When to use this code
Use C54.3 when the provider documents primary cancer of the uterine fundus, including pathology or operative notes that localize the tumor there. You may also use it when a report clearly states “fundus uteri” as the site. If the site is broader or unclear, check documentation.
Do not use for
Do not use this code for benign uterine tumors, cervical cancer, or malignancy documented only as “uterus” without fundal location. Check documentation if the primary site is uncertain.
Coding tip
Code from the most specific uterine site documented; if the fundus is not clearly stated, do not assume C54.3.