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

Individual provider Emergency Medicine Physician · NPI 1780818377

Mary-Stewart Willsie, DO is an Emergency Medicine in Newark, Delaware. Graduated from Kansas City University of Physicians and Surgeons in 2009, 17 years ago. Practices with Main Line Healthcare, a 1,153-clinician group and accepts Medicare assignment. Licensed in Delaware.

Years since qualifying
17
Trained at
Kansas City University of Physicians and Surgeons
Licensed in
DE
In the registry since
2009
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

4755 Ogletown Stanton Rd
Newark, DE 19718-0001
Phone: (130) 273-3100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence C7-0004280 (DE)

Record details

NPI number1780818377
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorYes
NPI enumeratedMay 11, 2009
Last updated in NPPESJuly 25, 2013

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolKANSAS CITY UNIVERSITY OF PHYSICIANS AND SURGEONS
Graduated 2009 (17 years in practice)
Group practice Main Line Healthcare — 1153 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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