Still, the concept of shifting patients to a medical home could save time and money and allow specialists to focus on complex patient care, according to the study published online ahead of print in the journal Medical Care.

"I don't think anyone would question that there are too few primary care physicians," says study lead author John M. Hollingsworth, M.D., M.S., an assistant professor of urology at the U-M Medical School. "The issue that came up in our study pertains to the role of specialist physicians in the new 'medical neighborhood.'

"Policymakers need to consider the scope and magnitude of care for which specialists are currently responsible in these delivery system reforms," he says.

Specialists spend a significant amount of time handling routine follow-up care for patients with chronic conditions that might be more cost-effectively delegated to primary care physicians.

But redistributing half of that workload could require either thousands of new primary care doctors or an extra three weeks of work a year from the primary care physicians in the current workforce, the study found.

U-M researchers examined the implications of redistributing the chronic disease care workload between specialists and primary care physicians under a patient-centered medical home model of care.

Known as PCMH, the model places an emphasis of having primary care doctors coordinate and quarterback their patients' medical care across multiple locations and settings; creating cost-savings by delegating less complex aspects of care; and shifting from an emphasis on volume under the fee-for-service model, to one that rewards the quality of the outcomes using performance measures.

The approach was an important part of the recent health care reform legislation and is becoming an increasingly popular solution to the current fragmentation and inefficiencies in the health care delivery system, the authors say.

According to the study, specialists spend a significant amount of time each year -- more than 650,000 work weeks collectively -- on routine follow-up care for patients with common chronic conditions, such as asthma, diabetes and low back pain.

Delegating a proportion of this care has the potential to create system-wide efficiencies by freeing up specialists to concentrate more on new patients and those with complex conditions.

"The cumulative time spent by specialists on routine chronic care is not trivial," says the study's senior author David C. Miller, M.D., M.P.H., an assistant professor of urology at the U-M Medical School.

"As a urologic oncologist, I take care of many cancer survivors. With a detailed care plan constructed by the treating oncologist, much of the follow-up care for these patients could potentially be assumed by a primary care physician-directed medical home, with appropriate referral back to me if problems or questions arise.

"This approach may have benefits for patients in terms of improving both coordination and access to care," Miller says.

Miller and several other study authors are affiliated with the Veteran's Affairs Ann Arbor Health Care System. The VA is one of two major federal departments that are moving toward implementing patient-center medical home reforms.

The medical home model also offers other potential benefits including less fragmentation of care, in which a patient's physicians aren't aware of what the others are doing; minimization of redundant tests and services; and more prestige and pay for primary care physicians, which may help entice more medical student to enter general medicine.

Note: If no author is given, the source is cited instead.

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