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With the passage of 63 O.S. Section 1-550.2 in 1992, birth defect surveillance began in Oklahoma County (which represents 21% of 1992 live births) with the establishment of the Oklahoma Birth Defects Registry (OBDR).  In 1993, data collection expanded to include Oklahoma, Tulsa, and Cleveland Counties, where 44 percent of the State's live births occurred. In 1994, the OBDR began statewide surveillance of Oklahoma births occurring in Oklahoma hospitals. Currently, a case entered into the OBDR must meet the following criteria:

  • was born on or after January 1, 1994,
  • mother was an Oklahoma resident at the time of birth,
  • diagnosed with, or having signs and symptoms of, an inclusion diagnosis prior to the second (2nd) birthday,
  • identified as an OBDR case prior to the child's third (3rd) birthday,
  • gestational age of 20 weeks or greater.

The OBDR utilizes multiple case ascertainment methods.  The primary method is ICD-10 discharge codes. The ICD-10 Code List includes birth defects and their corresponding ICD-10 codes which are used to identify potential cases.  Once a case is identified and determined to be a case based on the criteria above, the OBDR assigns a 6-digit diagnosis code.  This 6-digit coding system is based on British Pediatric Association Classification of Diseases.



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