David A. Major, MD

David A. Major, MD

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Medical School
Hahnemann Medical College

Hahnemann Hospital

Board Certification
American Board of Internal Medicine, added qualifications in Geriatric Medicine

Undergraduate School
Cornell University

Primary Care Doctor in Philadelphia, PA

I have my roots in Atlantic City where my grandfather was a Pharmacist and my father was a general practitioner. I came to Philadelphia for Medical School , Internship and Residency. After two years in the Military I returned to Philadelphia for an Academic career at Hahnemann University.

I won the Lindback Teaching Award, led the Student Programs in Internal Medicine, developed the first Federally funded Physician Assistant Program in the country and directed the Division of General Internal Medicine. I also served on and chaired multiple committees at the National Board of medical Examiners.

In 1990 I became one of the founders of NSIM, devoting myself to continuing the challenging career of practicing General Internal Medicine in a private practice group setting. The biggest challenge is continuous study to remain at the cutting edge of the Art and Science of Medicine. The second challenge is the evolution of a group practice as the health system changes and the team approach of the “Medical Home” is becoming the new practice model. The last challenge is recruitment and mentoring of outstanding young physicians who are such a vital component of NSIM.

Most important to me are the long term relationships with my patients and the stimulation of meeting new patients and starting new relationships

Outside of medicine I enjoy my family of females: my wife Evelyn, my 3 daughters Jill, Jane and Lynn and their families, including our 5 granddaughters I also love reading history and as many sports as I can squeeze into my free time.

Call to Schedule an Appointment with Dr. Major!

(215) 440-8681

COVID-19 Vaccine

We are pleased to announce that NSIM is partnering with Centennial Pharmacy Services to administer COVID vaccine shots in our office. We have worked closely with Centennial Pharmacy Services for many years and they are a trusted partner.

We do not know when our first doses of vaccine will arrive nor do we know how many doses we will get on a weekly basis. The number of people who want the vaccine is far greater than the supply Philadelphia receives weekly from the federal government.  We are following the Philadelphia Health Department prioritization phases in administering the vaccine. We anticipate it will take at least until the end of May or longer before the city has vaccinated all people over 65, those with chronic medical conditions, and those working in occupations essential to our economy.

If you want to receive the vaccine in our office when we receive a supply:

Register your interest

You will complete and submit a questionnaire. The information you submit is confidential and the only people who have access to it are the staff of NSIM and Centennial Pharmacy. It will be used only for the purpose of COVID vaccine administration and not for any marketing purposes or sold to any other entity. Once we know that we are receiving the vaccine, you will be contacted about an appointment time by Centennial Pharmacy either by text message, email, or phone (depending on your contact preference).


If you have any concerns about the safety, effectiveness, rapidity of development or other issues regarding the COVID vaccines, please contact your primary care provider at NSIM.

Please be patient. No one will be truly safe until everyone in our country who desires the vaccine has received it.  Please continue to wear your mask when outside of your home, maintain social distance, wash your hands, and follow other guidelines from the health department and CDC. Once you receive the vaccine, you will need to strictly maintain these precautions at all times until our public health officials tell us otherwise.

Call us (215) 440-8681  | View COVID-19 Vaccine Registration Info