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

Dr. Margaret K Williamson, MD

Individual provider Emergency Medicine Physician · NPI 1154514867

Dr. Margaret K Williamson, MD is an Emergency Medicine in Oak Lawn, Illinois. Graduated from University of Virginia School of Medicine in 2007, 19 years ago. Practices with Northwestern Medical Faculty Foundation, a 4,394-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
19
Trained at
University of Virginia School of Medicine
Licensed in
IL
In the registry since
2007
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

4440 W 95th St
Oak Lawn, IL 60453-2600
Phone: (434) 466-2969
Show map & directions

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

Additional practice locations (1)

  • 211 E Ontario St Ste 200, Chicago, IL 60611-3284 — (312) 694-7000

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 036126342 (IL)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 125-052545 (IL)

Record details

NPI number1154514867
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 26, 2007
Last updated in NPPESMarch 12, 2024
Certification dateMarch 12, 2024

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Northwestern Medical Faculty Foundation — 4394 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations8 on file with Medicare

Other providers in Oak Lawn