Slacks implies pants of certain materials which are not part of a suit (jeans are not slacks, and you would not refer to the pair of trousers that came with a suit as slacks.) It is also more common to use slacks to refer to pants worn by women, while men would wear trousers.
Health care safety net providers are those that have a legal mandate or mission to offer medical care to all patients, regardless of their ability to pay, and have a substantial number of patients who are uninsured or on Medicaid.
Medicaid is a health insurance program for certain low-income and needy people paid with federal, state, and county dollars. It covers more than 1 million people in our state, including children, the aged, blind, and/or disabled, and people who are eligible to receive federally assisted income maintenance payments.