With an aging Baby Boomer population and broadband bandwidth improved a hundredfold from a decade ago, telemedicine is exploding as a convenient and less costly alternative to the traditional visit to the doctors' office.

This year in the U.S. and Canada, 75 million of 600 million appointments with general practitioners will involve electronic visits, or eVisits, according to new research from Deloitte.

The overall cost of in-person primary physician visits worldwide is $175 billion, according to Deloitte. Globally, the number of eVisits will climb to 100 million this year, potentially saving over $5 billion when compared to the cost of in-person doctor visits. The eVisit projection represents growth of 400% from 2012 levels, Deloitte's study showed.

Last November, The University of Pittsburgh Medical Center (UPMC) revamped its patient portal, renaming it MyUPMC, and rolling out AnywhereCare, offering patients throughout Pennsylvania eVisits with doctors 24 hoirs a day, seven days a week either over the phone or through video conferencing.

UPMC, an $11 billion health care provider and insurer, with 21 hospitals, and more than 400 outpatient sites, said its AnywhereCare service has an 80% satisfaction rating. Patients love the convenience and speed of remote care, according to Natasa Sokolovich, executive director of telemedicine at UPMC.

"The new model provides a faster turnaround. Within 30 minutes ... they have the ability to get access to a healthcare provider," Sokolovich said.

eVisits reduce time to patient care and costs. Through electronic record portals, they can also offer physician and patient a view of the same health information, such as appointments, prescriptions, test results and complete medical histories.

Electronic visits or telemedicine is comprised of electronic document exchanges, telephone consultations, email or texting, and videoconferencing between physicians and patients.

The vast majority of eVisits, according to Deloitte, are likely to focus on capturing patient information through electronic forms, questionnaires and photos, rather than through direct interaction with a physician using Skype or some other real-time tool.

"For example, patients with symptoms of certain illnesses such as sinusitis, strep throat, allergies, bladder infection or acne would complete an online form and then receive a diagnosis and, if required, a prescription," Deloitte stated in a recent report.

While not all in-person primary physician consults can be handled by eVisits, even only 30% to 40% implies a $50 to $60 billion total addressable market, according to Deloitte.

In order to use its AnywhereCare eVisit service, UPMC patients go online and submit a symptom questionnaire and wait for a response from the first available healthcare professional. Patients also have online access to track appointments, see lab results and view the same medical information as physicians through an electronic medical record (EMR) system.

UPMC's original patient portal model allowed only patients with primary care physicians at the facility to contact doctors, and the wait time for a response could be as long as 24 hours. Now any resident of Pennsylvania can contact healthcare providers through the site. Since its launch in November, AnywhereCare has had 2,100 visits.

Those eVisits have also saved UPMC an average of $86.80 per member visit compared with the cost of an office visit.

Ultimately, Sokolovich hopes eVisits will also free up some of the pressures on primary care practices as physician shortages are anticipated grow industrywide.