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

Dr. John David Williamson, MD

Individual provider Family Medicine Physician · NPI 1043308661

Dr. John David Williamson, MD is registered under Family Practice in Charleston, South Carolina. Graduated from Medical University of South Carolina College of Medicine in 2006, 20 years ago. Practices with 24 on Physicians of SC LLC, a 137-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in South Carolina and Tennessee.

Years since qualifying
20
Trained at
Medical University of South Carolina College of Medicine
Licensed in
SC, TN
In the registry since
2006
Specialties on file
2
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

316 Calhoun St
Charleston, SC 29401-1113
Phone: (843) 402-1000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4095 American Way 1, Memphis, TN 38118-8339 — (901) 271-9500

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 29084 (SC)
Family Medicine Physician Taxonomy 207Q00000X · Licence 44600 (TN)

Record details

NPI number1043308661
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 10, 2006
Last updated in NPPESJuly 9, 2022
Certification dateJuly 9, 2022

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolMEDICAL UNIVERSITY OF SOUTH CAROLINA COLLEGE OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice 24 On Physicians Of Sc Llc — 137 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients316
Services billed 809 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at 24 on Physicians of SC LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 137 clinicians in the practice; 12 are shown here.

Other providers in Charleston