Multiple Primaries & Histology Coding Rules
Important
These modules are archived and should only be referenced for historical purposes.
The 2007 MP/H Rules are site-specific multiple primary and histology coding rules for lung, breast, colon, melanoma of the skin, head and neck, kidney, renal pelvis/ureter/bladder, and malignant brain. A separate set of rules addresses malignant solid tumors originating in other sites.
Suggested Citation
SEER Training Modules: Multiple Primaries & Histology Coding Rules. U.S. National Institutes of Health, National Cancer Institute. Cited 07 January 2026. Available from: https://training.seer.cancer.gov.