Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Princess Essi Mark-Adjeli, MD

Individual provider Medical Oncology Physician · NPI 1104351527

Dr. Princess Essi Mark-Adjeli, MD is a Medical Oncology in Washington, District of Columbia. Qualified in 2016, 10 years ago. Practices with Johns Hopkins University, a 198-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in District of Columbia.

Years since qualifying
10
Licensed in
DC
In the registry since
2017
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

5255 Loughboro Rd NW
Washington, DC 20016-2633
Phone: (202) 537-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 100 Hospital Rd, Patchogue, NY 11772-8809 — (631) 447-3010

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence MD210011849 (DC)

Record details

NPI number1104351527
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 23, 2017
Last updated in NPPESAugust 9, 2023
Certification dateAugust 9, 2023

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Johns Hopkins University — 198 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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