two hospital are saying they are going to turn my two bills over to a collection agency

by brent
(glendive MT usa)

I have four kids, one of them has special needs, i have good insurance and i pay $50 per month to 2 hospitals and 2 clinics and also eye doctors and dentists. Around $400 a month in medical. they (the hospitals) keep accepting my $50 per month via atm card, and one hospital by check. If i keep doing this can they still turn me over to collection agency? Total bill is $370 and $1300