Cross-reference word used in ICD-9-CM that is a mandatory instruction following a main term in the index, indicating that another term should be referenced and to look elsewhere for the correct diagnostic code.

Cross-reference phrase used in ICD-9-CM that is an instruction note found in the Alphabetic Index to Diseases. It instructs the coder to refer to a main term for the condition.

Cross-reference word/phrase used in Current Procedural Terminology (CPT) that directs the coder to look at other sections or codes.

Data that link the clinical data collected by the Surveillance Epidemiology and End Results (SEER) registries with insurance claims for health services collected by Medicare for its beneficiaries.

Acronym for Surveillance Epidemiology and End Results that is a program of the National Cancer Institute. It is the most authoritative source of information on cancer incidence and survival in the United States. Website: http://seer.cancer.gov .