Maribeth Porter Williams, M.D.
Family Medicine Physician · Greer, SC
Maribeth Porter Williams, M.D. is a family medicine physician with a practice address in Greer, South Carolina, and NPI 1487965265, issued on Jun 28, 2010. Check the license (South Carolina 32897, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Maribeth Porter Williams
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 32897 SC
ME124959 FL
Self-reported in NPPES; status is on the state search - Practice location
- 109 Physicians Dr Ste A, Greer, SC 29650
- Phone
- (864) 797-9150
- Enumerated
- Jun 28, 2010
- Record last updated
- May 12, 2025
- Fax
- (864) 797-9155
- Medicaid ID
- 015336300 FL
- Medicare enrollment
- Enrolled (PECOS I20130911000790); accepts Medicare assignment
- Medical or professional school
- University Of Mississippi School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,700 in South Carolina → Look up another NPI →
Also registered at 109 Physicians Dr Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lopa Bhansaly, D.O.Family Medicine Physician1154642726
- Julia ClarkFamily Medicine Physician1104566363
- Gabriela Cox, DOFamily Medicine Physician1497249189
- Amanda Fernandez, DOFamily Medicine Physician1063049989
- Natalie Hellman, PHDPsychologist1194563411
- Anita Kaney, MSWClinical Social Worker1801611892
Verify Maribeth Porter Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 32897Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average family medicine physician in 2024
2,153 Medicare Part D claims for 260 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 29 claims were for opioids.
Most prescribed
- Atorvastatin Calcium153 claims
- Amlodipine Besylate140 claims
- Lisinopril95 claims
- Eliquis55 claims
- Omeprazole55 claims
- Losartan Potassium54 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): 78.2 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 2 group practices
- Florida Clinical Practice Association IncGainesville, FL
- Prisma Health University Medical GroupGreer, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maribeth Porter Williams among 2,700 family medicine physician records in South Carolina
Maribeth Porter Williams, 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 2010, is newer than 58% of them.
- NPI issued2010 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2010 · median 2006 among the 1,638 with a school on file
- Record last updated2025 · 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).
66 family medicine physician records list a practice address in Greer
They are 66 of the 1,131 NPPES records with a practice address in Greer, and 2,700 family medicine physician records in South Carolina.
All 2,700 in South Carolina → Every provider in Greer → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jack Brunson, M.D.Greer, SC 296501316918253
- Maria Frisch, MDGreer, SC 296501639181662
- Allen Gamble, D.O.Greer, SC 296501265493605
- Rebecca Haskill-Strowd, MDGreer, SC 296501619995065
- Benjamin Hester, M.D.Greer, SC 296501538225206
- David Hudson, M.D.Greer, SC 296501104897891
- Clanford Johnson, M.D.Greer, SC 296501750342879
- Frances Kunda, MDGreer, SC 296501609852391
Common questions
What is Maribeth Porter Williams, M.D.'s NPI number?
Maribeth Porter Williams, M.D.'s National Provider Identifier (NPI) is 1487965265, issued on Jun 28, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Maribeth Porter Williams, M.D. located?
The NPPES record lists a practice address at 109 Physicians Dr Ste A, Greer, SC, 29650. Phone: (864) 797-9150. Providers update this record themselves, so call before visiting.
How can I verify Maribeth Porter Williams, M.D.'s license?
NPPES lists South Carolina license number 32897, 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 Maribeth Porter Williams, M.D. prescribe under Medicare Part D?
In 2024, Maribeth Porter Williams, M.D. had 2,153 Medicare Part D claims for 260 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Maribeth Porter Williams, M.D.'s MIPS final score?
The 2023 MIPS final score is 78.2 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.