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NCHStats 
What is the latest national/regional and statewide use-rate data available by Medical/Surgical, Obstetrics, Behavioral Health, Rehabilitation and pediatrics and where can I find it?
Hi Steve,
If you mean visits to differnt types of doctors, take a look at the tables in http://www.cdc.gov/nchs/data/nhsr/nhsr003.pdf. Unfortunately, we only have national data, not state data.