The diagnosis classification system used as criteria in UPDBL queries is based on the Agency for Healthcare Research and Quality (AHRQ) clinical classification standard.

See for more details.

Cowen ME, Dusseau DJ, Toth BG, et al. Casemix adjustment of managed care claims data using the clinical classifications for health policy research method. Medical Care, 1998, 36:1108-1113. Elixhauser A, McCarthy EM. Clinical classifications for health policy research, version 2: Hospital inpatient statistics. Healthcare Cost and Utilization Project (HCUP 3) Research Note 1. Rockville, MD: Agency for Health Care Policy and Research; 1996. AHCPR Pub. No. 96 0017.

The cancer diagnosis classification that is used in UPDBL is based on the SEER incidence site recode standard. See for more details.

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