Online Version of ICD-O-3 

An online version of ICD-O-3 is available on the International Agency for Research on Cancer website: click here . This useful tool should be used with the following important notes.

Note 1: Only use the original publication (ICD-O-3, copyright 2000). Registrars should not use the ICD-0-3.1 (2011) codes, as the new codes have not been approved for implementation in the United States and/or Canada.

Note 2: Refer to the NAACCR Guidelines for ICD-O-3 Update Implementation  for the list of ICD-O-3 codes changes effective 1/1/2014: click here .

Note 3: Use the histology rules in the MP/H manual for solid tumors.

Note 4: Use the histology rules in the Hematopoietic and Lymphoid Database for non-solid tumors.