Collin D. Cullen, MD

Internal Medicine
4400 Jenifer Street NW Suite 350
Washington, DC 20015 Get Directions
Collin D. Cullen, MD
More information available

Annual Membership Fee

495.00 every 3 months
990.00 every 6 months
1,980.00 each year

My Philosophy and Approach to Wellness...

I was raised in a primary care household with an admiration for family medicine. I had a front row seat, as my father was a general practitioner in the DC area for 30 years. Practicing primary care with my brothers over the last 21 years has been the most rewarding part of my career; learning from some of the finest and giving patients optimal care. My MDVIP-affiliated practice focuses on the relationship between the physician and the patient. My approach is grounded in the belief that the doctor-patient connection is the foundation of all successful healthcare. Listening to the patient has always been the most important diagnostic test. I also offer conveniences, like same- or next-day appointments that start on time, which may be found in concierge medicine practices.   

As a native Washingtonian, I have served the Northwest DC, Montgomery County, Maryland and Sibley Hospital communities my entire professional life. I am dedicated to preventive medicine and am uniquely qualified to serve this area because this is where, and how, I was raised.

Dr. Cullen's Credentials

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Geisinger Medical Center
Danville, PA
Internal Medicine 1994-1997
Chief Resident, Internal Medicine & Pediatrics 1997

Geisinger Medical Center
Danville, PA

Medical School:
Georgetown University School of Medicine
Washington, DC
Doctorate of Medicine 1993

LaSalle University
Philadelphia, PA
Bachelor of Arts, Biology and English 1989

American Board of Internal Medicine 
Sibley Memorial Hospital
Annual Top Doctor Award, Washingtonian Magazine 2000-present
Castle Connolly Top Doctor, 2019-2024
Sibley Hospital
 - Peer Review, Internal Medicine 2015-present
 - Secretary/Treasurer, Department of Medicine 2018-present
 - Member at Large, Department of Medicine 2015-2018
District of Columbia

Testimonials from patients of Dr. Cullen

from Keith in MD March 17, 2024 for Collin D. Cullen, MD

Dr Collin Cullen was our true friend in need and advisor when we were away, and his patient suffered a spine surgery setback fighting a MRSA infection. She was hospitalized several times and finally had to undergo antibiotic IV infusion over a nine week period from mid-November through mid-January. During that entire time we were away, including the holidays, Dr. Collin Cullen kept in touch… See more

from George in MD March 11, 2024 for Collin D. Cullen, MD

Dr. Cullen is a fantastic listener, very smart, always right, generous with his time, efficient, professional, and available. He is my peace of mind. I’m so grateful he is my doctor. He makes it an impossible choice to relocate because there is no other like him. Dr. Cullen is an absolute one of. He gives me confidence and hope. Other physicians are complimentary as well. I have an advantage… See more

from Michael in MD March 10, 2024 for Collin D. Cullen, MD

Dr. Cullen is a perfect example of the dedication to his patients. And I'm no exception. If I have any questions regarding the correct amt. of a particular drug dosage I take, for instance, or understanding what symptoms I have that most times Dr. Cullen can diagnose, he'll return my call the very same day, usually within 12 hours. In addition, very good bedside manner.

from Terrill in MD March 10, 2024 for Collin D. Cullen, MD

In December I had annual mammogram and was told something questionable showed up. I would need to have another mammogram as well as an ultrasound. After having that done I was told I needed to have a biopsy of the area. As a breast cancer survivor I was naturally nervous an very concerned. Before scheduling the biopsy I wanted to talk to Dr. Cullen, my PCP. I was able to talk with him… See more

from Bruce in MD March 10, 2024 for Collin D. Cullen, MD

My story has more to do with consistency than any specific occurrence. Dr. Cullen has always been incredibly responsive regardless of the day of the week, or the time of day. It’s very comforting to know I can depend on him to be there for me when called upon.

from JAMES in MD February 18, 2024 for Collin D. Cullen, MD

Mostly, I like him. He is very responsive when I call him. All around good guy.

from Judy in MD February 15, 2024 for Collin D. Cullen, MD

My husband and I can't give enough praise to Dr. Collin Cullen. My husband has been with Dr. Cullen ever since he joined MDVIP. I was so impressed with Dr. Cullen, that I left my PCP after about 20+ years to join MDVIP BECAUSE I WANTED TO HAVE Dr. Cullen as my personal care provider. He has returned calls to us at all hours, weekend and weekday, even very late at night. Dr. Cullen has… See more

from John Lawrencr in MD February 14, 2024 for Collin D. Cullen, MD

Dr Collin Cullen has been my doctor for many years. He has always been promptly available and very knowledgeable and helpful with health matters I have raised with him, and has made thoughtful, useful suggestions/recommendations. I am most pleased with his performance.

from Leslie in DC February 11, 2024 for Collin D. Cullen, MD

History of care with Dr Cullen revolves around always being able to get in touch and solve all problems with great care and speed He’s simply an amazing diagnostician and care giver

from Gary in MD February 11, 2024 for Collin D. Cullen, MD

Dr. Collen Cullen is always there for me and my family, for whatever we need. Whether it’s seeing us in person, talking via telehealth. Or email or text. He’s always there for us!