Margaret Caitlin Williamson, MD
Family Medicine Physician · Columbus, GA
Margaret Caitlin Williamson, MD is a family medicine physician with a practice address in Columbus, Georgia, and NPI 1124589023, issued on Mar 26, 2019. Check the license (Georgia 93290, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- Margaret Caitlin Williamson
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 93290 GA
Self-reported in NPPES; status is on the state search - Practice location
- 2122 Manchester Expy, Columbus, GA 31904
- Phone
- (706) 452-5709
- Enumerated
- Mar 26, 2019
- Record last updated
- Mar 19, 2024
- Medicare enrollment
- Enrolled (PECOS I20221005001222); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,951 in Georgia → Look up another NPI →
Also registered at 2122 Manchester Expy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Caitlin Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 93290Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average family medicine physician in 2024
266 Medicare Part D claims for 123 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Pantoprazole Sodium13 claims
- Tamsulosin Hcl12 claims
- Atorvastatin Calcium11 claims
- Levofloxacin11 claims
- Prednisone11 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.
Bills Medicare through 2 group practices
- Southeastern Hospitalist Services PCColumbus, GA
- St Francis Physician Practices LLCColumbus, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Caitlin Williamson among 3,951 family medicine physician records in Georgia
Margaret Caitlin Williamson, MD is one of 3,951 family medicine physician records with a practice address in Georgia. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 82% of them.
- NPI issued2019 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2019 · median 2005 among the 2,542 with a school on file
- Record last updated2024 · 53% 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 Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
172 family medicine physician records list a practice address in Columbus
They are 172 of the 5,517 NPPES records with a practice address in Columbus, and 3,951 family medicine physician records in Georgia.
All 3,951 in Georgia → Every provider in Columbus → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Eunice Ampiaw, MDColumbus, GA 319041962499137
- Robert Bush, MDColumbus, GA 319041952302481
- Henry Carroll, MDColumbus, GA 319041336140334
- Jerry Chase, MDColumbus, GA 319041114908365
- Linda Chin, M.D.Columbus, GA 319041780665208
- Ronald Hudson, MDColumbus, GA 319041548257611
- Linda Moore, MDColumbus, GA 319041134116106
- Gregory Parker, MDColumbus, GA 319041851392575
Common questions
What is Margaret Caitlin Williamson, MD's NPI number?
Margaret Caitlin Williamson, MD's National Provider Identifier (NPI) is 1124589023, issued on Mar 26, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Caitlin Williamson, MD located?
The NPPES record lists a practice address at 2122 Manchester Expy, Columbus, GA, 31904. Phone: (706) 452-5709. Providers update this record themselves, so call before visiting.
How can I verify Margaret Caitlin Williamson, MD's license?
NPPES lists Georgia license number 93290, as entered by the provider. Search the Georgia Composite Medical Board at https://medicalboard.georgia.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Margaret Caitlin Williamson, MD prescribe under Medicare Part D?
In 2024, Margaret Caitlin Williamson, MD had 266 Medicare Part D claims for 123 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.