John David Williamson, M.D.
Family Medicine Physician · Charleston, SC
John David Williamson, M.D. is a family medicine physician with a practice address in Charleston, South Carolina, and NPI 1043308661, issued on Oct 10, 2006. Check the license (South Carolina 29084, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John David Williamson
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 29084 SC
44600 TN
Self-reported in NPPES; status is on the state search - Practice location
- 316 Calhoun St, Charleston, SC 29401
- Phone
- (843) 402-1000
- Enumerated
- Oct 10, 2006
- Record last updated
- Jul 9, 2022
- Medicaid ID
- 1512962 TN
- Medicare enrollment
- Enrolled (PECOS I20200306001486); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,700 in South Carolina → Look up another NPI →
Also registered at 316 Calhoun St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Taylor AdamPhysician Assistant1902576929
- Mary Ann Adiong, RNRegistered Nurse1396694287
- Elizabeth Alvarez, NPCritical Care Medicine Nurse Practitioner1295288421
- Andrew Anderson, M.D.Diagnostic Radiology Physician1073729711
- Selena Anderson, FNPFamily Nurse Practitioner1346737673
- Claire Andrew, MS, RDRegistered Dietitian1134970049
Verify John David Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 29084Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average family medicine physician in 2024
368 Medicare Part D claims for 156 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Atorvastatin Calcium25 claims
- Amoxicillin-Clavulanate Potass24 claims
- Prednisone24 claims
- Amlodipine Besylate17 claims
- Cefdinir12 claims
- Furosemide12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- 24 ON Physicians OF SC LLCCharleston, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John David Williamson among 2,700 family medicine physician records in South Carolina
John David Williamson, M.D. is one of 2,700 family medicine physician records with a practice address in South Carolina. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2006 · median 2006 among the 1,638 with a school on file
- Record last updated2022 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
209 family medicine physician records list a practice address in Charleston
They are 209 of the 10,840 NPPES records with a practice address in Charleston, and 2,700 family medicine physician records in South Carolina.
All 2,700 in South Carolina → Every provider in Charleston → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- David Albenberg, M.D.Charleston, SC 294011679583850
- Joseph Anderson, MDCharleston, SC 294011992707749
- Christopher Blasy, DOCharleston, SC 294011740283092
- Charles Ellis, M.D.Charleston, SC 294011629024211
- Lizina Green, MDCharleston, SC 294011033438189
- Richard Lacavera, DOCharleston, SC 294011952410763
- Samay Omary, M.D.Charleston, SC 294011043486111
- Leslie Pelzer, M.D.Charleston, SC 294011750563318
Common questions
What is John David Williamson, M.D.'s NPI number?
John David Williamson, M.D.'s National Provider Identifier (NPI) is 1043308661, issued on Oct 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John David Williamson, M.D. located?
The NPPES record lists a practice address at 316 Calhoun St, Charleston, SC, 29401. Phone: (843) 402-1000. Providers update this record themselves, so call before visiting.
How can I verify John David Williamson, M.D.'s license?
NPPES lists South Carolina license number 29084, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John David Williamson, M.D. prescribe under Medicare Part D?
In 2024, John David Williamson, M.D. had 368 Medicare Part D claims for 156 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is John David Williamson, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.