As an affiliate of Yale New Haven Health System, the leadership of Northeast Medical Group is dedicated to a common mission: A commitment to innovation and excellence in patient care, teaching, research and service to our communities.


Prathibha Varkey, MBBS, MPH, MHPE, MBA

President & CEO, NEMG & Senior Vice President, YNHHS

Dr. Varkey is responsible for the strategic, operational, clinical and fiscal leadership of Northeast Medical Group. Prior to her current role, she was president and CEO of the Clinical Enterprise, a multispecialty group at Seton Family Healthcare, the largest health system in Austin, Texas. Dr. Varkey spent most of her career at Mayo Clinic in Rochester, Minnesota, where she was professor of medicine and preventive medicine and served in several leadership roles. A nationally recognized expert in quality improvement, she recently completed her term as president of the American College of Medical Quality. Dr. Varkey is the editor of two textbooks: Medical Quality Management: Theory and Practice, and the Mayo Clinic Preventive Medicine and Public Health Board Review

Dr. Varkey earned her MBBS (MD equivalent) from Christian Medical College in Vellore, India; internal medicine residency at the Hospital of Saint Raphael in New Haven, Connecticut; and preventive medicine fellowship at Mayo Clinic in Rochester, Minnesota. She has a master's in public health from the Harvard School of Public Health, a master's in health professions education from the University of Illinois Chicago and an MBA from the Carlson School of Management at the University of Minnesota.


Keith Tandler

Vice President, Finance

Keith Tandler is lead finance executive for Northeast Medical Group. He joined YNHHS in 2008 as director of Finance, leading areas within the system's Corporate Finance department, including accounting, tax, internal control/enterprise risk, accounts payable and payroll. He also serves on several health system management groups, including the Patient Experience Council, Non-Labor Executive Steering Committee and Innovation Investment Council. A certified public accountant, Keith received an MBA in finance and management from New York University's Stern School of Business and a Bachelor of Business Administration in Accounting from the University of Massachusetts at Amherst.


Arnold DoRosario, MD

Vice President, Chief Medical Officer & Chief Population Health Officer

Prior to joining Northeast Medical Group, Dr. DoRosario served as Medical Director for PriMed, focusing on implementing policies, procedures and best practices among the group. Dr. DoRosario received his medical degree from Universidad De Navarra, Facultad De Medicina, Pamplona, Spain and is board certified in both geriatrics and internal medicine. He completed his residency and internship at St. Vincent’s Medical Center of Bridgeport.

Peter Logue

Peter Logue, FACHE

Vice President, Operations

Before joining Northeast Medical Group, Peter Logue was Vice President and Chief Operating Officer of Mill Hill Medical Consultants, the Bridgeport Hospital-based group practice, and Director and Vice President of Practice Management for ProHealth Physicians primary care group practice. He received his BS in political science from the University of Vermont and his MHA from the Medical College of Virginia/Virginia Commonwealth University.

Aimee Derry

Aimee Derry, MHA

Executive Director, Business Development

Aimee Derry is responsible for clinician recruitment, mergers and acquisitions, clinician onboarding, facilities, business development, and innovation. She also provides operational leadership over Northeast Medical Group and Yale Medicine collaborations. Aimee joined Northeast Medical Group in 2011 as Director of Practice Operations. In that role, she led operations in the New Haven region, oversaw the walk-in medical centers and directed the group’s access initiatives.  Prior to joining Northeast Medical Group, she served as Director of Operations at Hartford Medical Group and Executive Director of Connecticut Medical Group.  She received her BS in Management from Merrimack College in North Andover, MA, and her MHA from Clark University in Worcester, MA.


Kathleen Madden

Director, Accountable Care Organization/Value Based Programs

Kathleen Madden brings a wealth of knowledge and experience related to value-based contracts, including provider incentives, bundled payments and shared savings. Previously, she built collaborative programs with key physician and hospital groups in both the Connecticut and Michigan markets to improve cost and outcomes. Most recently, she was vice president of delivery system partnerships and strategic initiatives at ConnectiCare in Farmington, CT. In addition to the ACO and value-based programs, Kathy provides oversight to Northeast Medical Group’s quality and patient experience programs.


Robert Dickman

Director, Regional Practice Operations

Robert Dickman leads practice operations in the New Haven Region and oversees Northeast Medical Group's walk-in centers. Prior to joining Northeast Medical Group, Robert was the Executive Director at Saint Mary’s Hospital in Waterbury, CT and was responsible for the Franklin Medical Group and Outpatient Services.  A veteran of the U.S. Navy Hospital Corps, Robert received his Bachelor’s Degree from the University of Connecticut and his MBA from Baker College in Flint, MI. He is board certified by the American College of Medical Practice Executives and is a senior member of the Healthcare Information and Management Systems Society.


Christine Hines

Director, Regional Practice Operations

Chris Hines leads practice operations in the Bridgeport Region and oversees Northeast Medical Group's endoscopy and sleep centers. Prior to joining NEMG, Christine was the Director of Operations and Account Manager at MED3000/McKesson in Shelton, CT. She received her BS in Healthcare Management from Quinnipiac University in Hamden, CT.


Susan Vinchesi

Director, Regional Practice Operations

Susan Vinchesi oversees practice operations for Northeast Medical Group’s Southeastern Connecticut and Rhode Island region. Susan joined Northeast Medical Group from L+M Medical Group where she served as the Director of Operations and oversaw the group’s practices in Connecticut and Rhode Island. Previously, she was Director of Outpatient Services for Backus Hospital in Norwich, CT.  Susan received her BS in Business Administration from the University of Massachusetts at Amherst and her MBA from California State University.

Board of Trustees

Nicholas Bertini, MD
H. Anthony Carter, MD
Gary Desir, MD
Patrick Green
Sheikh (Mahfuz) Hoq, MD
Marc Lombardi
Christopher O’Connor
Paula Santrach, MD
John E. Schmeltzer
Peter Schulam, MD
Stephanie Spangler, MD
Elliot Sussman, MD
Keith Tandler
Prathibha Varkey, MBBS