2026 ICD-10-CM Diagnosis Code C57.12Malignant neoplasm of left broad ligament
ICD-10-CM Codes›C00–D49›C51-C58›C57
- Billable — Valid for Submission
- Chronic Condition
C57.12 is a billable ICD-10-CM diagnosis code for malignant neoplasm of left broad ligament. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 736 through 741, 754 through 756. Coders also document this condition as malignant neoplasm of broad ligament of uterus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Female reproductive system cancers - all other types.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Malignant neoplasm of broad ligament of uterus
- Primary malignant neoplasm of broad ligament
- Primary malignant neoplasm of left broad ligament
- Primary malignant neoplasm of pelvic peritoneum
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Broad Ligament
a broad fold of peritoneum that extends from the side of the uterus to the wall of the pelvis.Internal Hernia
a protrusion of an internal abdominal organ through a hole in an anatomical structure such as a muscle or a membrane. for instance, in paraduodenal hernia the small intestine herniates through an opening in the mesenteries. it includes intra-abdominal and diaphragmatic hernias. in abdominal hernia a protrusion occurs through a weak spot in the muscle of the abdominal wall.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| broad ligament | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| ligament [See Also: Neoplasm, connective tissue] | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| ligament [See Also: Neoplasm, connective tissue] › broad | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| mesosalpinx | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| mesovarium | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| paroophoron | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| parovarium | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| utero-ovarian › ligament | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
| uterus, uteri, uterine › ligament › broad | C57.1 | C79.82 | D07.39 | D28.2 | D39.8 | D49.59 |
Patient EducationClinical
Uterine Cancer
Uterine cancer is a cancer that forms in tissues of the uterus, which is sometimes called the womb. The uterus is the place where a fetus grows during pregnancy.
The full article covers:
- What is uterine cancer?
- Who is more likely to develop uterine cancer?
- What are the symptoms of uterine cancer?
- How is uterine cancer diagnosed?
- What are the treatments for uterine cancer?
- Can uterine cancer be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert C57.12 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About C57.12Overview
Is C57.12 (Malignant neoplasm of broad ligament) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of left broad ligament on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does C57.12 group to?
When malignant neoplasm of left broad ligament is the principal diagnosis on an inpatient stay, it groups to MS-DRG 736, 737, 738, 739, 740, 741, 754, 755, 756, with relative weights from 0.9605 to 3.5745 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of C57.12?
Under the General Equivalence Mappings, malignant neoplasm of left broad ligament converts to ICD-9-CM 183.3 (mal neo broad ligament). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
