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

Dr. Margaret Mary Sullivan, MD

Individual provider Cardiovascular Disease Physician · NPI 1134330178

Dr. Margaret Mary Sullivan, MD is a Cardiovascular Disease (Cardiology) in Ennis, Texas. Graduated from University of Texas Medical School at San Antonio in 2004, 22 years ago. Practices with Texas Specialty Physicians, a 58-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
22
Trained at
University of Texas Medical School at San Antonio
Licensed in
TX
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

802 W Lampasas St
Ennis, TX 75119-4536
Phone: (972) 875-4700
Show map & directions

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

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence N5421 (TX)

Record details

NPI number1134330178
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 24, 2007
Last updated in NPPESAugust 16, 2017

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT SAN ANTONIO
Graduated 2004 (22 years in practice)
Group practice Texas Specialty Physicians — 58 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare