Medicare program; update of ambulatory surgical center payment rates effective July 1, 1990--HCFA. Notice with comment period

This notice implements section 1833(i)(2(A) of the Social Security Act, which requires that the payment rates for ambulatory surgical center services be reviewed and updated annually, and responds to public comments we received concerning the ambulatory surgical center payment rate update notice published on February 8, 1990 (55 FR 4577).