Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Collin Dempsey Cullen, MD

Individual provider Internal Medicine Physician · NPI 1689769523

Dr. Collin Dempsey Cullen, MD is an Internal Medicine in Washington, District of Columbia. Graduated from Georgetown University School of Medicine in 1993, 33 years ago. Works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
33
Trained at
Georgetown University School of Medicine
Licensed in
MD
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5410 Connecticut Ave NW Ste 117
Washington, DC 20015-2831
Phone: (202) 966-2828
Fax: (202) 966-0108
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 7625 Wisconsin Ave, Bethesda, MD 20814-6512 — (301) 951-0420

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD0052247 (MD)

Record details

NPI number1689769523
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 4, 2006
Last updated in NPPESMay 26, 2022
Certification dateMay 26, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesPEDIATRIC MEDICINE
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1993 (33 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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