San Francisco-based Circle Medical, which has developed a doctor house call app, raised $2.9 million in a round led by Collaborative Fund with participation from Tencent, Real Ventures, Kima Ventures, Paul Buchheit, a partner at Y Combinator, and YouTube cofounder Jawed Karim, according to Venture Beat.

There are a number of other app-based house call services on the market, but Circle Medical's offering is slightly different. Instead of focusing exclusively on urgent care, Circle Medical also aims to provide patients with a primary care physician. Types of visits that Circle Medical offers include annual wellness exams, vaccinations and flu shots, chronic condition management, and treatment if the user is sick or injured. If the patient ends up needing a blood test, the physician will order the exam and the lab technician will come to the patient.

The app first asks users to scan their insurance card so that Circle Medical can verify patients' insurance and provide a price for the visit based on their benefits. From there, patients can pick a date, time, and location, and the app will notify patients when a doctor is on their way. Circle Medical accepts Anthem Blue Cross, UnitedHealthcare, Aetna, Health Net, and Cigna. If users do not have insurance, the visit costs $200.

While patients will have a primary physician who is responsible for their annual wellness exams and overall care, if patients want a same-day visit, Circle Medical matches users with an available physician. The company said that although it does not offer gynecology or pediatrics at the moment, it plans to add those services eventually.

The company also offers an employer service that provides employees with primary care needs on site. Workplaces that Circle Medical has visited so far include Airbnb, weebly, earnest, Y Combinator, and drchrono. Employers must provide a private room that a Circle Medical physician can use to meet with patients. The company also requires a minimum of four confirmed appointments to schedule a half day or 10 for a full day.

Just in the past month, three other mobile house call services made news. PediaQ, which offers an app-based pediatric house call service, raised $1.2 million. Mobile house call service Dispatch Health announced that it was adding an iOS app to its offering -- it currently provides its service through local municipal services providers. And Heal, which also aims to offer primary care services to patients, just announced that it is now in-network with Anthem Blue Cross of California.

In October, MedZed raised $3.2 million for its doctor house call service that allows providers to remotely connect with their patients with the help of a caregiver and FRND, a house call service that sends a registered nurse, not a doctor to meet with the patient, launched its offering in New York City.

Earlier this summer, in July, Pager raised $14 million from New Enterprise Associates (NEA) and Sound Ventures, which was founded by actor Ashton Kutcher. The company has raised a total of $24 million to date.