The 2007 Multiple Primary and Histology Coding Rules present the first site-specific multiple primary and histology rules developed to promote consistent and standardized coding by cancer registrars. These rules should be used for cases diagnosed from 2007 to 2017. See Registrar Training to view documents and transcripts from the MP/H Rules training sessions.
The 2007 Multiple Primary and Histology Coding Rules contain site-specific rules for lung, breast, colon, melanoma of the skin, head and neck, kidney, renal pelvis/ureter/bladder, benign brain, and malignant brain. A separate set of rules addresses the specific and general rules for all other sites. The multiple primary rules guide and standardize the process of determining the number of primaries. The histology rules contain detailed histology coding instructions. For example, grouping histologic terms, differentiating between general (NOS) terms and specific histologic types and subtypes, and identifying mixed and combination codes are covered. The MP/H Task Force also developed three new data items that complement these rules.
Please visit the coding manual download page to obtain a copy of the Multiple Primary and Histology Coding Rules Manual.
For cases diagnosed from 2018 and forward, see the 2018 Solid Tumor Coding Manual.