TY - GEN AU - Cassidy,M A TI - OIG advisory opinions recognize health care market realities SN - 1526-0704 PY - 1999///0414 KW - Fraud KW - legislation & jurisprudence KW - Health Care Sector KW - Health Services Misuse KW - Medicaid KW - Medicare KW - Physician Self-Referral KW - United States KW - United States Dept. of Health and Human Services N1 - Publication Type: Journal Article; Legal Case ER -