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

Dr. John Wesley Mercer Jr., MD

Individual provider Family Medicine Physician · NPI 1235196957

Dr. John Wesley Mercer Jr., MD is a Family Practice in Wylie, Texas. Graduated from Louisiana State University School of Medicine in New Orleans in 1997, 29 years ago. Practices with Healthtexas Provider Network, a 2,539-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Texas.

Years since qualifying
29
Trained at
Louisiana State University School of Medicine in New Orleans
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

600 Cooper Dr
Wylie, TX 75098-3970
Phone: (972) 442-7325
Fax: (972) 442-8348
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence L1667 (TX)

Record details

NPI number1235196957
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 27, 2006
Last updated in NPPESJanuary 18, 2023
Certification dateJanuary 18, 2023

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolLOUISIANA STATE UNIVERSITY SCHOOL OF MEDICINE IN NEW ORLEANS
Graduated 1997 (29 years in practice)
Group practice Healthtexas Provider Network — 2539 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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