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

Dr. Mario Marquist Ray, MD

Individual provider Internal Medicine Physician · NPI 1326128364

Dr. Mario Marquist Ray, MD is an Internal Medicine in Memphis, Tennessee. Graduated from University of Tennessee, Hsc, College of Medicine in 2003, 23 years ago. Practices with UT Regional One Physicians Inc, a 327-clinician group and accepts Medicare assignment. Licensed in Tennessee.

Years since qualifying
23
Trained at
University of Tennessee, Hsc, College of Medicine
Licensed in
TN
In the registry since
2006
Specialties on file
2
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

877 Jefferson Ave Rm A589
Memphis, TN 38103-2807
Phone: (901) 545-8774
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 39663 (TN)
Internal Medicine Physician Taxonomy 207R00000X · Licence 39663 (TN)

Record details

NPI number1326128364
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 16, 2006
Last updated in NPPESAugust 14, 2017
Mailing address877 Jefferson Ave, Rm A589, Memphis, TN 38103-2807

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF TENNESSEE, HSC, COLLEGE OF MEDICINE
Graduated 2003 (23 years in practice)
Group practice Ut Regional One Physicians Inc — 327 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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