'98 Medicare Growth Slowest Since Program Began in '65
New Govt data show growth of Medicare slowed to virtual halt in 1998 as spending in health insurance program for elderly rose by just 1.5 percent, smallest increase since its inception in 1965; slowdown shows effects of Congressional curbs on payments to hospitals and home health care agencies, and results of Federal crusade against Medicare fraud; spending rose by average of $12.8 billion, or 10 percent per year, in past decade; grew only $3.1 billion in 1998, to total of $213.6 billion; number of beneficiaries grew in 1998 by slightly more than 1 percent, to 39 million, which budget experts say makes increase in spending for each beneficiary almost zero (M)