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

Meredith Jo Mason, MD

Individual provider Emergency Medicine Physician · NPI 1457663791

Meredith Jo Mason, MD is an Emergency Medicine in Marietta, Ohio. Graduated from West Virginia University School of Medicine in 2010, 16 years ago. Practices with Marietta Memorial Hospital, a 386-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Ohio and West Virginia.

Years since qualifying
16
Trained at
West Virginia University School of Medicine
Licensed in
OH, WV
In the registry since
2010
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

401 Matthew St Emergency Dept
Marietta, OH 45750-1635
Phone: (740) 376-1939
Fax: (740) 374-1693
Show map & directions

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

Additional practice locations (3)

  • 799 Farson St, Belpre, OH 45714-1044 — (740) 401-1150
  • 1106 Colegate Dr Emergency Dept, Marietta, OH 45750-1323 — (740) 568-2000
  • 314 S Wells St, Sistersville, WV 26175-1098 — (304) 652-2611

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 350123041 (OH)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 24808 (WV)

Record details

NPI number1457663791
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 1, 2010
Last updated in NPPESNovember 12, 2025
Certification dateNovember 12, 2025
Mailing addressPo Box 449, Marietta, OH 45750-0449

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolWEST VIRGINIA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Marietta Memorial Hospital — 386 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Marietta