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

Mary Lizzie Thomas, MD, MPH

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1215556253

Mary Lizzie Thomas, MD, MPH is an Internal Medicine in New Haven, Connecticut. Graduated from Indiana University School of Medicine in 2020, 6 years ago. Practices with UT Regional One Physicians Inc, a 327-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Tennessee.

Years since qualifying
6
Trained at
Indiana University School of Medicine
Licensed in
TN
In the registry since
2020
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MPH — Master of Public Health
A graduate degree in population health.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

20 York St
New Haven, CT 06510-3220
Phone: (203) 688-4242
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (2)

  • 920 Madison Ave Ste 447, Memphis, TN 38103-3438 — (901) 448-5814
  • 877 Jefferson Ave, Memphis, TN 38103-2807 — (901) 545-7100

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 73730 (TN)
Geriatric Medicine (Internal Medicine) Physician Taxonomy 207RG0300X · Licence 73730 (TN)
Hospice and Palliative Medicine (Internal Medicine) Physician Taxonomy 207RH0002X · Licence 73730 (TN)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1215556253
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MPH
Sole proprietorYes
NPI enumeratedApril 9, 2020
Last updated in NPPESApril 30, 2025
Certification dateApril 23, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2020 (6 years in practice)
Group practice Ut Regional One Physicians Inc — 327 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in New Haven