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

Dr. Michael Thomas Johnston, MD

Individual provider Internal Medicine Physician · NPI 1144232265

Dr. Michael Thomas Johnston, MD is an Internal Medicine in Dallas, Texas. Graduated from University of Texas Medical School at San Antonio in 1995, 31 years ago. Practices with Healthtexas Provider Network, a 2,539-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Texas.

Years since qualifying
31
Trained at
University of Texas Medical School at San Antonio
Licensed in
TX
In the registry since
2006
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

3417 Gaston Ave Ste 1000
Dallas, TX 75246-2016
Phone: (469) 800-9000
Fax: (469) 800-9010
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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 K0498 (TX)

Record details

NPI number1144232265
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 13, 2006
Last updated in NPPESApril 13, 2017

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT SAN ANTONIO
Graduated 1995 (31 years in practice)
Group practice Healthtexas Provider Network — 2539 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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