Part B covers 2 types of services
Medically necessary services: Services or supplies that are needed to diagnose or treat your medical condition and that meet accepted standards of medical practice. Preventive services: Health care to prevent illness (like the flu) or detect it at an early stage, when treatment is most likely to work best.
You pay nothing for most preventive services if you get the services from a health care provider who accepts assignment.
Part B covers things like:
- Clinical research
- Ambulance services
- Durable medical equipment (DME)
- Mental health
- Partial hospitalization
- Limited outpatient prescription drugs