Mark Humphrey, MD
Emergency Medicine Physician · Winnsboro, SC
Mark Humphrey, MD is an emergency medicine physician with a practice address in Winnsboro, South Carolina, and NPI 1801976402, issued on Oct 17, 2006. Check the license (South Carolina 36168, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark Humphrey
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 36168 SC
R1133 KY
Self-reported in NPPES; status is on the state search - Practice location
- 56 US Highway 321 Byp N, Winnsboro, SC 29180
- Phone
- (803) 635-6343
- Enumerated
- Oct 17, 2006
- 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.Geriatric Medicine (Family Medicine) Physician1134116957
- Kayleigh Rushford, FNPFamily Nurse Practitioner1275358244
- Mark Shaffer, MDFamily Medicine Physician1639308380
- Kylie Whittle, MDFamily Medicine Physician1528682622
Verify Mark Humphrey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 36168Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
10.8 times the Medicare Part D claims of the average emergency medicine physician in 2024
3,837 Medicare Part D claims for 228 beneficiaries, against an average of 355 among the 49,029 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 141 claims were for opioids.
Most prescribed
- Atorvastatin Calcium238 claims
- Amlodipine Besylate204 claims
- Metformin Hcl139 claims
- Omeprazole129 claims
- Fluticasone Propionate104 claims
- Levothyroxine Sodium104 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 Medicare quality score for 2023: 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).
One hospital or facility affiliation
- Prisma Health Medical Group-MidlandsColumbia, SC
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
2 emergency medicine physician records list a Winnsboro practice address
They are 2 of the 97 NPPES records with a Winnsboro practice address, and 1,234 emergency medicine physician records in South Carolina.
All 2 in Winnsboro → All 1,234 in South Carolina → Every provider in Winnsboro →
Other emergency medicine physician records in South Carolina
- Jennifer Abrams, D.O.Elgin, SC1104899210
- Jennifer Adair, M.D.Summerville, SC1679600134
- Robert AdamsColumbia, SC1508397605
- Michael Adkins, M.D.Walterboro, SC1811992209
- Dalal Akoury, M.D.Myrtle Beach, SC1154350965
- Halley AlbertsColumbia, SC1407421662
- Judson Alderman, M.D.Greenville, SC1043667629
- Henrique Alencastro Puls, MDGreenville, SC1568969723
- James Alexander, MDGreenville, SC1124099270
- Paul Alexander, M.D.Dillon, SC1023014891
Common questions
What is Mark Humphrey, MD's NPI number?
Mark Humphrey, MD's National Provider Identifier (NPI) is 1801976402, issued on Oct 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Humphrey, MD located?
The NPPES record lists a practice address at 56 US Highway 321 Byp N, Winnsboro, SC, 29180. Phone: (803) 635-6343. Providers update this record themselves, so call before visiting.
How can I verify Mark Humphrey, MD's license?
NPPES lists South Carolina license number 36168, 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 Humphrey, MD prescribe under Medicare Part D?
In 2024, Mark Humphrey, MD had 3,837 Medicare Part D claims for 228 beneficiaries; the average among emergency medicine physician prescribers was 355. Part D covers Medicare prescriptions only.
What is Mark Humphrey, MD's Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.