Some practitioners, both medical and dental, will offer healthcare benefits. But not a lot, as it's rather costly. You'll find a few practitioners who are even willing to help pay for it by giving their employees a fixed amount of money and allowing them to choose their own coverage based on their individual needs. (It's called defined contribution health insurance.) Most dental employers will even give dental discounts to their employees if they utilize that practice, however, it may be awhile before that benefit kicks in. When I worked for ProCare Dental, you had to work there an entire year before you could start getting the discounts. You'll also find dermatologists and chiropractors who'll give generous employee discounts on products and services. If you're really lucky, you may find a few who'll provide services and products at no cost.
If you're a receptionist for a hospital system or an affiliated group practice, then you'll almost certainly receive medical and dental insurance benefits even if you work part-time.