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

Individual provider Cardiovascular Disease Physician · NPI 1619906112

William B Hillegass Jr., MD is an Internal Medicine in Jackson, Mississippi. Graduated from Harvard Medical School in 1988, 38 years ago. Practices with State of Mississippi - University of Mississippi Medical Center, a 952-clinician group and accepts Medicare assignment. Licensed in Mississippi.

Years since qualifying
38
Trained at
Harvard Medical School
Licensed in
MS
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 Partly verified

Some contact details are missing from the federal record.

Select Specialty - Cardiology 5903 Ridgewood Rd
Jackson, MS 39211-1900
Phone: (601) 984-5678
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 32921 (MS)

Record details

NPI number1619906112
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 30, 2006
Last updated in NPPESAugust 28, 2025
Certification dateAugust 20, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1988 (38 years in practice)
Group practice State Of Mississippi - University Of Mississippi Medical Center — 952 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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