Can ride-hailing companies cure medical transportation woes?

Lyft and Uber are attempting to cure a major medical problem for poor people and the elderly: getting a ride to the doctor.

The San Francisco ride-hailing services are expanding their offer to take patients around the country to and from non-emergency health care appointments, and they have a huge market to target.

More than 7 million Americans miss medical care every year due to a lack of transportation, according to health economist Paul Hughes-Cromwick.

Health insurers and care providers have been trying to solve this problem for years. Those who have studied it say Lyft and Uber will help, but improving access to health care involves more than just lining up a ride.