Mark Edward Shaffer, MD
Family Medicine Physician · Winnsboro, SC
Mark Edward Shaffer, MD is a family medicine physician with a practice address in Winnsboro, South Carolina, and NPI 1639308380, issued on Jul 2, 2009. Check the license (South Carolina 31836, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark Edward Shaffer
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 31836 SC
Self-reported in NPPES; status is on the state search - Practice location
- 56 US Highway 321 Byp N, Winnsboro, SC 29180
- Phone
- (803) 635-6099
- Enumerated
- Jul 2, 2009
- Record last updated
- Jun 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (803) 635-6343
- Medicaid ID
- 318365 SC
- Medicare enrollment
- Enrolled (PECOS I20150216000865); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2009
- Entity
- Type 1 · individual
Also registered at 56 US Highway 321 Byp N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brittany BorchersPhysician Assistant1275316887
- Stephen Brunton, M.D.Family Medicine Physician1134116957
- Mark Humphrey, MDFamily Medicine Physician1801976402
- Kayleigh Rushford, FNPFamily Nurse Practitioner1275358244
- Kylie Whittle, MDFamily Medicine Physician1528682622
Verify Mark Edward Shaffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 31836Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
17% fewer Medicare Part D claims than the average family medicine physician in 2024
2,958 Medicare Part D claims for 246 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 57 claims were for opioids.
Most prescribed
- Amlodipine Besylate154 claims
- Atorvastatin Calcium147 claims
- Ozempic92 claims
- Metformin Hcl Er80 claims
- Albuterol Sulfate Hfa76 claims
- Farxiga70 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 MIPS final score for 2023 (Medicare payment program): 99.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Prisma Health Medical Group-MidlandsColumbia, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
10 family medicine physician records list a practice address in Winnsboro
They are 10 of the 97 NPPES records with a practice address in Winnsboro, and 2,700 family medicine physician records in South Carolina.
All 10 in Winnsboro → All 2,700 in South Carolina → Every provider in Winnsboro →
Other family medicine physician records in South Carolina
- Fiby Abd El Malek, M.D.Greenville, SC1215222047
- Marwa Abdel Meguid, MD, MSAiken, SC1912646555
- Souzan Abdel-Samie, M.DSummerville, SC1144514266
- Dustin Abele, M.D.Spartanburg, SC1851771349
- Stoney Abercrombie, MDAnderson, SC1093732430
- Olabisi Abisogun, MDGreer, SC1366940157
- Samson Abolaji, MDFlorence, SC1922946714
- Joseph Abraham, M.D.Anderson, SC1497934657
- Sheron Abraham, D.O.Florence, SC1447548144
- Fareeha AbrarGreer, SC1497506703
Common questions
What is Mark Edward Shaffer, MD's NPI number?
Mark Edward Shaffer, MD's National Provider Identifier (NPI) is 1639308380, issued on Jul 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Edward Shaffer, MD located?
The NPPES record lists a practice address at 56 US Highway 321 Byp N, Winnsboro, SC, 29180. Phone: (803) 635-6099. Providers update this record themselves, so call before visiting.
How can I verify Mark Edward Shaffer, MD's license?
NPPES lists South Carolina license number 31836, 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 Mark Edward Shaffer, MD prescribe under Medicare Part D?
In 2024, Mark Edward Shaffer, MD had 2,958 Medicare Part D claims for 246 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Mark Edward Shaffer, MD's MIPS final score?
The 2023 MIPS final score is 99.3 of 100. 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.