I was still 100 percent clinical, in practice as a solo internist in the Boston area, but was working a few hours per week as the medical director of an IPA-model HMO
we had created at our hospital to compete with Harvard Community Health Plan, a growing staff-model HMO in the area.
John Deere Health Care operates an IPA-model HMO
enrolling 300,000 people and three primary care clinics, covering an estimated 17,000 lives (mainly John Deere employees and their dependents).
On the other hand, until fairly recently, it was generally believed that an IPA-model HMO
or other managed care plan utilizing independent contractors would not be vicariously liable for the negligence of its independent contractor physicians.
This study found that relatively few of the primary care practices affiliated with a large IPA-model HMO
in central Massachusetts reported using office reminder systems for screening mammography.
The organizations represented in the survey include regional group- and staff-model HMO, a large mixed-model HMO, a national insurance company-based HMO, a large regional IPA-model HMO
, and numerous consultants.
HMO of Pennsylvania held that an IPA-model HMO
had a nondelegable duty to select and retain competent providers.
Sheikee is Medical Director of a large IPA-model HMO
in a large southern city.
The AV-MED Health Plan is an IPA-model HMO
with Plan programs in five metropolitan areas--South Florida, Tampa, Orlando, Jacksonville, and Gainesville.
A Pennsylvania appellate court similarly reversed a grant of summary judgment in favor of an IPA-model HMO
in a case alleging that the HMO's contracting physicians were its ostensible agents.
Another set of models substituted the number of group/staff model HMOs and the number of IPA-model HMOs
for the aggregate number of HMOs to determine if alliance activity is tied to the presence of certain types of plans.
Provider-based tracking systems are well suited to both group- and IPA-model HMOs
, and previous studies document their effectiveness in increasing vaccination coverage (6 ).