Los Angeles-based Heal, which has developed an app that helps people request a doctor to visit their house, raised $5 million from Slow Ventures, March Capital, Pritzker Capital, and angel investors. This brings the company's total funding to $8.7 million.

Existing investors include singer-songwriter Lionel Richie, Qualcomm Executive Chairman Paul Jacobs, and Los Angeles Dodgers co-owner Jamie McCourt.

The app, available on iOS and Android, first launched in January. Users pay $99 to have a doctor come to their house in under an hour. Similarly to Uber, after requesting a doctor, the user can see the doctor’s location in the app when they are en route to the user’s house. All doctors are provided through a medical practice established by Heal, called Heal At-Home Medical. The doctors on Heal are available from 8 a.m. to 8 p.m., seven days a week.

Patients are able to receive many of the services that they get at a doctor visit like an annual physical, blood tests, specialist recommendations, and prescription delivery. Doctors will bring digital health tools to visits, including an AliveCor ECG and CellScope otoscope.

The company said it will use funding to help expand its service to 15 cities over the next year. Currently, Heal is available in Los Angeles and expanded in April to San Francisco.

"I created Heal to make life easier for busy parents and adults to get world-class primary care in the comfort, convenience and privacy of their home," Heal Founder Dr. Renee Dua said in a statement. "Our vision is to transform primary care into a one-stop primary health solution, where patients can call on Heal at a moment's notice not only for everything a traditional doctor's visit can provide, but also for cutting-edge services and tools that put patients in control of their health like never before."

In early March, a similar service, Pager, raised $10.4 million. Pager’s doctors do an initial consult over the phone to determine what sorts of diagnostic and treatment tools they might need to bring, then show up at the patient’s house for the visit. The service currently costs $49 for the first visit and $199 for each visit after that.

And a week after Pager announced the funding, San Francisco-based FirstLine Medical launched its doctor consultation service, called FirstLine. The offering allows patients to call, text, or video chat with a doctor, but if users choose, they can also request a doctor to make an in-person visit to their home or office.

In a recent keynote, Scripps Health cardiologist Dr. Eric Topol mentioned Heal as he poked fun at the recent influx of Uber-like house call apps.

"There’s five different apps where you can get a doctor to come to your house to do a consult,” he said. “One of them’s called Heal and it’s backed by Lionel Ritchie. I wrote to him and said ‘Maybe you should have called it ‘All night long’. He said ‘No, it’s all day long too’.”