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

Karen Tonya Mason, MD

Individual provider Emergency Medicine Physician · NPI 1598858086

Karen Tonya Mason, MD is an Emergency Medicine in Upper Marlboro, Maryland. Graduated from Howard University College of Medicine in 1996, 30 years ago. Practices with Emergency Medicine Services of Fl LLC, a 665-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
30
Trained at
Howard University College 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

1221 Mercantile Ln
Upper Marlboro, MD 20774-5374
Phone: (301) 938-3541
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2401 W Belvedere Ave, Baltimore, MD 21215 — (410) 601-5737

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence D56418 (MD)

Record details

NPI number1598858086
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 2, 2006
Last updated in NPPESJanuary 10, 2022
Certification dateJanuary 10, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolHOWARD UNIVERSITY COLLEGE OF MEDICINE
Graduated 1996 (30 years in practice)
Group practice Emergency Medicine Services Of Fl Llc — 665 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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