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

John M Willis, DO

Individual provider Internal Medicine Physician · NPI 1205891207

John M Willis, DO is an Internal Medicine in Mansfield, Texas. Graduated from University of North Texas Hsc, College of Osteopathic Med in 1990, 36 years ago. Practices with Medhealth, a 437-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
36
Trained at
University of North Texas Hsc, College of Osteopathic Med
Licensed in
TX
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

252 Matlock Rd Ste 130
Mansfield, TX 76063-4295
Phone: (682) 242-8990
Fax: (682) 242-8996
Show map & directions

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

Additional practice locations (1)

  • 2800 E Broad St Ste 512, Mansfield, TX 76063-6417 — (817) 473-6867

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence J0366 (TX)

Record details

NPI number1205891207
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 20, 2006
Last updated in NPPESMarch 23, 2022
Certification dateMarch 23, 2022
Mailing address252 Matlock Rd Ste 130, Mansfield, TX 76063-4295

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF NORTH TEXAS HSC, COLLEGE OF OSTEOPATHIC MED
Graduated 1990 (36 years in practice)
Group practice Medhealth — 437 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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