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

Dr. Elizabeth Hart Mahon Williams, MD

Individual provider Internal Medicine Physician · NPI 1952697468

Dr. Elizabeth Hart Mahon Williams, MD is an Internal Medicine in Saint Louis, Missouri. Graduated from University of Missouri, Columbia School of Medicine in 2011, 15 years ago. Practices with Legacy Healthcare Services Inc, a 3,624-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
15
Trained at
University of Missouri, Columbia School of Medicine
Licensed in
MO
In the registry since
2011
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

615 S New Ballas Rd
Saint Louis, MO 63141-8221
Phone: (314) 251-5834
Fax: (314) 251-6272
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2011014989 (MO)

Record details

NPI number1952697468
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 22, 2011
Last updated in NPPESJanuary 6, 2014

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MISSOURI, COLUMBIA SCHOOL OF MEDICINE
Graduated 2011 (15 years in practice)
Group practice Legacy Healthcare Services Inc — 3624 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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