About Us

All professionals at Internal Medicine Associates of Westport, P.C. maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.


Dr. Altbaum

Robert A. Altbaum, M.D.

Dr. Altbaum decided he wanted to become a doctor when he was in high school. Focusing on internal medicine has allowed him to utilize his aptitude in science, satisfy his curiosity about how the body works and create rewarding long-term personal relationships. Medicine has provided him with the privilege of caring for the people of Fairfield County.

Growing up in the Bronx, he attended Bronx High School of Science and then New York University, from which he graduated junior Phi Beta Kappa and Summa Cum Laude. Dr. Altbaum then attended Harvard Medical School. He stayed in Boston and completed a three-year residency in Internal Medicine at Massachusetts General Hospital and then moved to CT to spend one year of Ambulatory Chief Residency at Yale-New Haven Hospital. Although he became board certified in Geriatrics to enhance his skills in caring for the elderly, he has always preferred treating adult patients of all ages.

After his training, Dr. Altbaum joined Internal Medicine Associates of Westport, and has valued the years of building close relationships with his patients. He feels fortunate to have received a Castle Connolly Top Docs award for fifteen consecutive years.

When not using a stethoscope, he enjoys his family, good friends, tennis, hiking, going to the gym and playing keyboards in a local rock and roll band, DNR.

Medical School

  • Harvard Medical School

Internship and Residency

  • Massachusetts General Hospital

Board Certified in Internal Medicine, by American Board of Internal Medicine



Dr. Horn

Jay A. Horn, M.D.

Born and raised in New York City, Dr. Horn did his undergraduate work at the State University of New York at Binghamton, graduating Phi Beta Kappa. He attended medical school at the Albert Einstein College of Medicine and then did his internal medicine residency at Montefiore Medical Center, both in the Bronx.

He has been in practice as a primary care internist for over thirty years, starting with Kaiser Permanente in Stamford and later moving to Internal Medicine Associates of Westport in 1999. He has been president of the group since 2007.

Board Certified in Internal Medicine, Dr. Horn is also a member of the American College of Physicians, the American Medical Association, and the Fairfield County Medical Association. He is a Castle Connolly Top Doctor.

Dr. Horn is married with two wonderful daughters, and in his free time enjoys gardening, bicycling, skiing and spending time with friends and family enjoying cheese, wine, and great food.

Medical School

  • Albert Einstein College of Medicine

Internship and Residency

  • Montefiore Medical Center, Bronx, New York

Board Certified in Internal Medicine, by American Board of Internal Medicine



Dr. Pinto

Mario A. Pinto, DO

Education

  • D.O. Medicine A. T. Still School of Osteopathic Medicine in Arizona
  • B.S. Biology (Magnum cum Laude), The City College of New York, New York, NY

Residency

  • NYU Lutheran Hospital, Brooklyn, NY

Membership

  • American College of Physicians



Dr. Jaime Ruszkowski

Jaime Ruszkowski, M.D.

Dr. Jaime Ruszkowski M.D was born in New Haven, CT, raised in CT and received her degree as an Honors Scholar in Molecular and Cell Biology from the University of Connecticut. She completed her medical degree with honors from Albany Medical College in NY, graduating in the top of her class and elected to Alpha Omega Alpha- the prestigious Honor Medical Society. She always knew she wanted to be a primary care physician and was honored to receive “The Richard Barnett Award” at graduation. An award to one graduating senior student who embodies those characteristics considered to be ideal for the practice of General Internal Medicine. She then went on to graduate from the Yale Primary Care Internal Medicine Residency Program where she was honored to be chosen to serve an additional year as Chief Resident. She is thrilled to be practicing in her home state since 2012. Her special interests include preventive care, diabetes, hypertension and hyperlipidemia. In her free time she enjoys spending time with her husband and two young children, reading and running.

Education

  • Albany Medical College, Albany, NY
    Doctor of Medicine, Cum Laude
     
  • University of Connecticut, Storrs, CT
    Molecular and Cell Biology Major
    Bachelor of Science & Honors Scholar, Magnum cum Laude

Internship

  • Yale New Haven Hospital
  • Yale Primary Care Internal Medicine Residency Training Program

Residency

  • Yale New Haven Hospital
  • Yale Primary Care Internal Medicine Residency Training Program
    Chief Resident

Certifications

  • American Board of Internal Medicine



Dr. Elizabeth J. R. McKinnis

Elizabeth J. R. McKinnis, M.D.

Dr. Elizabeth McKinnis grew up in Norwalk, CT, attending Brien McMahon High School and then doing her undergraduate work at Yale University, graduating Magna Cum Laude and with Distinction in the Major with a Bachelor of Arts in English.  After working for the Fred Hutchinson Cancer Research Center in Seattle, Washington, she went on to get her medical degree at the University of Washington in Seattle.  She completed Primary Care Internal Medicine Residency at the University of Washington, stayed on to be Chief Resident, and then joined the faculty at the University of Washington Women’s Clinic.  She moved back to Connecticut in 2003 to be closer to family.  Dr. McKinnis had a thriving practice in Fairfield and Westport, prior to joining our group in January 2015.

Board Certified in Internal Medicine, Dr. McKinnis is a member of the American College of Physicians, the professional group for the specialty of internal medicine, where she has served most recently on the planning committee for the Connecticut annual meeting in 2016. She is also a member of the American Medical Association, Fairfield County Medical Association, and the Fairfield County Women in Medicine chapter of the American Association of Women in Medicine.  She also serves on the Board of Directors of the Westport-Weston Family Y.

In her leisure time, Dr. McKinnis loves spending time with her husband and their four children, as well as traveling, swimming, playing tennis and curling up with a good book. 

Medical School

  • University of Washington School of Medicine

Internship and Residency

  • University of Washington School of Medicine

Board Certified in Internal Medicine, by American Board of Internal Medicine




Kevin R. McDonald, PA-C

Kevin R. McDonald, PA-C

Kevin McDonald, PA-C joined our practice in April 2017. Previously he worked in Internal Medicine in Fairfield, CT for St. Vincent’s Multi-Specialty Medical Group. Kevin has also worked at Internal Medicine office in New Jersey, Maryland and Connecticut. He holds licenses in California, Missouri, Maryland, New Jersey and Connecticut.

He was born in Missouri and attended Southwest Missouri University and then United States Public Health Service Physician Assistant program, graduating in 1979. He immediately left for New York City. He has worked extensively with the U.S. Department of Justice and U.S. Public Health Service. Throughout his service he has conducted his own patient clinics in hypertension and cardiovascular diseases, diabetes, pulmonary diseases (asthma, COPD), infectious diseases, neurological disorders, gastrointestinal disorders and orthopedics. He received orthopedic training in intra-articular joint injections and has performed hundreds of these for his patients. He believes in the disease prevention model of medicine and strongly supports this with his patients.

He was also appointed to the CDC Task Force on Treatment and Prevention of Multi-Drug Resistant Tuberculosis during his tenure in Washington, D.C. He is a recipient of the U.S. Surgeon General’s Recognition Award for his service with the U.S. AIDS program.

During down time he enjoys photography, exercise (home gym), a passion for paleontology and of course playing with Ginger and Snaps (two adorable cats).

Medical School

  • Physician Assistant Progam, United States Public Health Service, MCFP, Springfield, Missouri
  • B.S. Psychology, Missouri State University, Springfield, Missouri

Certifications/Membership

  • Board Certified Physician Assistant, American Academy of Physician Assistants

Experience:

  • Adult medicine working in the primary care in Connecticut for the past four years and in New Jersey and MD over the last 13 years as a Physician Assistant.
  • Maryland Correctional Training Center, Federal Bureau of Prisons.
  • Coordinator for National Infectious Disease Programs, Federal Bureau of Prisons.
  • Former member of CDC Taskforce for the Prevention of Multidrug Resistance Tuberculosis.

Awards:

  • U.S. Surgeon General’s Recognition Award.