Cornerstone Medical Group
Quick Facts
| Practice Type | Concierge |
| Location | Brookline, Boston, Cambridge, Newton |
| Doctors | Jonathan Blumberg MD, Internal Medicine |
| Insurance Accepted | Medicare, All major insurances |
About
At Cornerstone Medical Group, Dr. Jonathan Blumberg delivers internal medicine and primary care to adults in Brookline and the surrounding Boston area. The practice serves patients across Brookline, Boston, Cambridge, Newton, and nearby communities. Dr. Blumberg holds an affiliation with Beth Israel Deaconess Medical Center.
Cornerstone Medical Group keeps its patient panel intentionally small. That lets Dr. Blumberg focus on the full picture of each patient's health, not just individual symptoms. He takes time to understand each patient's concerns and builds care around overall wellness. The practice also maintains long-standing relationships with top specialists in Boston and beyond. Dr. Blumberg coordinates specialist referrals directly, handling appointments, test result follow-up, and guidance on next steps. The practice accepts all major insurances, including Medicare.
Details
Our Doctors
Similar Practices Nearby
Explore More
Frequently Asked Questions
Yes, Cornerstone Medical Group accepts all major insurances, including Medicare. Patients can use their existing coverage for care at the practice. If you have questions about a specific plan, call the practice directly at 617-731-6334.
You can reach the practice by phone at 617-731-6334 or through the contact form on the website. A team member will walk you through the joining process and answer any questions about membership.
Dr. Blumberg coordinates specialist care on your behalf. He sets up referral appointments, follows up on test results, and explains next steps in plain language. His long-standing relationships with top specialists in Boston and beyond help patients access timely, high-quality specialist care.
Cornerstone Medical Group is located at 1101 Beacon Street, Suite 2W, in Brookline, MA. The practice serves patients from Brookline, Boston, Cambridge, Newton, and surrounding communities.
Dr. Blumberg focuses on both. He addresses specific symptoms and conditions while keeping overall wellness at the center of each patient's care plan. His approach involves spending real time with patients to understand the full picture of their health.
The practice limits its patient panel to ensure each member receives personal attention. That smaller panel size allows Dr. Blumberg to provide thorough, unhurried care at every visit.
Yes, prospective patients can call 617-731-6334 or reach out online through the practice website. Dr. Blumberg welcomes questions from anyone considering membership at Cornerstone Medical Group.
Practice last updated March 21, 2026