Although the company's CEO Tim Cook hasn't shared any figures, the research firm looked at the iPhone maker's earnings to get to the estimate.
The health system will release several Apple Watch and iOS apps for patients, as well as an iOS application targeted at physicians.
With the upcoming iOS 9 update, the iPhone's Health app will finally be able to track a woman's period; Siri will get the ability to start/stop a workout.
Currently, only three of 22 apps on the list feature Apple Watch support, including Hospital RN, Field Connect and Incident Aware.
The 9to5Mac report says the Cupertino-based company is working to add the ability to track blood oxygen saturation, blood pressure and blood sugar levels.
Polaris Health Directions and MD Anderson Cancer Center at Cooper are teaming-up to monitor patients' expected treatment response.
King's College Hospital will rely on Medopad's software to make it easier for patients to go through complicated treatment regimens.
Apple's wearable is used to support Ochsner's Hypertension Digital Medicine Pilot Program which tracks patients struggling to control their blood pressure.
Unlike traditional doctor visits, Heal doctors spend as much time as needed with each patient for a fixed fee of $99, anytime between 8 a.m. and 8 p.m.
The application integrates Apple HealthKit data from users' monitoring devices and then applies medical intelligence to generate individual notifications.