The virtual health care platform HealthTap has launched a new service called “Concierge,” which allows users to connect with their own primary care doctor, or with a specialist, in all 50 states.

The new service is an improvement over HealthTap’s “Prime” service, which paired users up with participating primary care doctors in 28 states.

HealthTap CEO Ron Gutman told VentureBeat that around 64,000 physicians are now connected to the virtual care platform. This includes doctors from 105 specialties. When HealthTap was only for primary care doctors, Gutman says, lots of specialists were hearing about the platform and asking to sign up.

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Above: The HealthTap Concierge app runs on all available iOS and Android devices.

Patients can locate their own primary care doctor through the platform, or request that their doctor sign up with HealthTap.

Doctors can join for free. With the membership they get access to HealthTap’s curated news, health answers, and tips, which they can share with their virtual patients as well as with their regular in-person patients.

The platform also provides doctors with patient engagement tools like aftercare checklists and reminders. Using the communications module, doctors can communicate with patients via mobile video, text, and voice.

(Some of the brightest minds in digital health will be discussing new modes of patient engagement at VentureBeat’s HealthBeat conference on October 27th & 28th.)

Users connect to HealthTap Concierge using a new app, which runs on Android and iOS devices. They can also access the service via a desktop computer.

The service is available to users on a pay-as-you-go basis, at a price of $44 per virtual doctor visit. Gutman points out that the cost isn’t that much more expensive than the common $30 co-pay for a traditional doctor visit.

HealthTap is backed by Khosla Ventures, Eric Schmidt’s Innovation Endeavors, Mayfield Fund, and Mohr Davidow Ventures.