Every year, Inc. Magazine talks thousands of private companies into divulging their otherwise closely held financial data to the publication in exchange for a chance at placing on the annual Inc 5,000 and Inc 500 fastest growing private companies in America lists.

While MobiHealthNews doesn’t generally report on awards, we started covering Inc's last year because it’s based on hard data, albeit self-reported: the percent change of annual revenue in a three-year period. Using this metric, Inc once again placed nearly 400 health-related companies among its top 5,000, and a good number of them were digital health companies.

Read on for 15 private digital health companies (plus HealthiestYou, which is now a part of public Teladoc) willing to divulge their annual revenue figures. These are ordered as Inc ordered them -- by percent growth.

52. PrescribeWellness. 2015 revenue: $10.3 million. PrescribeWellness, which offers patient engagement and medication adherence software tools to pharmacies, grew 4,897 percent in the past three years. It jumped up quite a few spots from #164 last year. Site.

196. HealthSparq. 2015 revenue: $20.3 million. Portland, Oregon-based Cambia Health subsidiary HealthSparq, an online shopping platform for healthcare services, grew 1,914 percent in the past three years, entering the list for the first time this year as the #3 Portland company. Site.

304. Welltok. 2015 revenue: $26.2 million. Denver, Colorado-based health management company Welltok, which makes the CafeWell health engagement platform, grew 1,285 percent over the last three years. Both Welltok and HealthSparq achieved some of that growth through acquisitions, with Welltok picking up a number of companies over the last three years. Site.

322. Wellbe. 2015 Revenue: $2.2 million. Wellbe, a patient engagement and remote patient monitoring company based in Madison, Wisconsin, saw 1,201 percent growth. Founded in 2009, the company leverages both care coordination and patient-generated data to help hospitals with accountable care. Site.

384. Health Catalyst. 2015 Revenue: $41 million. Health Catalyst CEO Dan Burton confirmed at Health 2.0 last year that Utah-based health data warehouse is eyeing a 2017 IPO. The company grew 998 percent over the last three years. Site.

397. Healthiest You. 2015 Revenue: $9.7 million. We already knew Healthiest You’s revenue numbers, since they were revealed when Teladoc announced its intention to buy the company at the beginning of the summer. But we didn’t know about the company’s 965 percent growth over the last three years. Site.

559. Fitness on Demand. 2015 Revenue: $3.4 million. This Minnesotan company that offers remote fitness classes via a smart touch-screen kiosk grew revenues 700 percent over the last three years. It stayed pretty close to its same spot on last year’s list, #554. Site.

675. Wellness IQ. 2015 Revenue: $4.6 million. Independence, Ohio-based employee wellness program maker Wellness IQ grew 582 percent over the last three years. The company makes the Vitality Wellness program. They were number 358 on last year’s list. Site.

692. Clinical Ink. 2015 Revenue: $9 million. Horsham, PA-based Clinical Ink's revenue grew just 570 percent over the past three years, compared to its blockbuster 4,600 percent growth when it made the list last year. Clinical Ink offers mobile-enabled software for point-of-care, clinical trial data capture. Site.

858. Modernizing Medicine. 2015 Revenue: $52.4 million. Boca Raton, Florida-based Modernizing Medicine makes a mobile-based electronic medical record, called EMA (electronic medical assistant), targeted at specialists. The company grew 462 percent over the last three years. Site.

865. Patagonia Health. 2015 Revenue: $3.2 million. Dropping from #269 on last year’s list, Cary, North Carolina-based Patagonia Health grew 459 percent in the past three years. The company offers mobile-enabled, cloud-based tools for medical practices and public health organizations that integrate EHRs, billing, and practice management into one platform. Site.

877. Connexion Point. 2015 Revenue: $40.1 million. Salt Lake City-based Connexion Point grew its revenues by 453 percent over the last three years. It was #531 last year with 800 percent growth. Connexion Point works with health plans and providers to engage members and patients. Site

1420. Entrada Health. 2015 Revenue: $10.3 million. Brentwood, Tennessee-based Entrada has developed an app that helps physicians dictate their notes. Through the app, physicians can organize patient notes, pictures, and other information in one place, and also send that data to an electronic health record. The company grew its revenue more 270 percent over the past three years. Site

2340. Vitals. 2015 Revenue: $24.9 million. More often known as Vitals.com, this Lyndhurst, New Jersey-based company provides online doctor reviews and healthcare transparency shopping. It grew 155 percent over the last three years. Site.

4396. eClinicalWorks. 2015 Revenue: $402 million. Massachusetts EHR and practice management software provider eClinicalWorks grew just 59 percent over the last three years. It’s made the list every year since 2007, when it started out at the #37 spot. Site.

4452. Viverae. 2015 Revenue: $37.2 million. Dallas, Texas based employee wellness company Viverae just relaunched its mobile app today. Over the past three years, the company grew 58 percent, just barely enough to make Inc’s list for the sixth time since 2009. Site.