About
Jonathan Blumberg, MD is the physician behind Cornerstone Medical Group, a concierge internal medicine practice in Brookline, MA. He holds an affiliation with Beth Israel Deaconess Medical Center. Dr. Blumberg focuses on adult primary care with an emphasis on whole-patient wellness. He believes thorough, attentive care starts with genuinely getting to know each patient. That philosophy shapes every appointment he conducts. He keeps his panel small so he can give each patient the time and attention their health deserves.
Who is Dr. Blumberg right for?
Dr. Blumberg is a strong fit for adults who want a primary care physician who knows them well. Patients managing chronic conditions or complex health histories benefit from his whole-patient approach. He works well with those who value direct specialist coordination and consistent follow-through. Adults in Brookline, Boston, Cambridge, Newton, and nearby communities can access his practice, which accepts Medicare and major insurances.
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Frequently Asked Questions
Dr. Blumberg specializes in internal medicine and adult primary care. He focuses on whole-patient wellness, attending to the full picture of a patient's health rather than individual symptoms in isolation.
Dr. Blumberg sees adult patients across Brookline, Boston, Cambridge, Newton, and nearby communities. He works with patients managing a range of health concerns, with a focus on comprehensive, relationship-driven care.
Dr. Blumberg coordinates specialist referrals directly. He manages appointment scheduling, follows up on test results, and guides patients through next steps. His long-standing relationships with top Boston-area specialists help patients get connected to the right care quickly.
Yes, Dr. Blumberg holds an affiliation with Beth Israel Deaconess Medical Center in Boston.
Yes, Dr. Blumberg accepts all major insurances, including Medicare. Prospective patients should contact the practice to confirm their specific plan.
Dr. Blumberg limits his panel so he can give each patient genuine time and attention. He believes thorough care starts with knowing each patient well, and a smaller panel makes that possible.
Dr. Blumberg believes attentive care begins with truly understanding each patient. He builds care plans around overall wellness and takes time during appointments to address each person's concerns fully.
Doctor profile last updated March 21, 2026