Mark Adam Stewart, MD
Family Medicine Physician · Greer, SC
Mark Adam Stewart, MD is a family medicine physician with a practice address in Greer, South Carolina, and NPI 1770233710, issued on Mar 24, 2022. Check the license (South Carolina 88220, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark Adam Stewart
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 88220 SC
Self-reported in NPPES; status is on the state search - Practice location
- 426 Memorial Drive Ext, Greer, SC 29651
- Phone
- (864) 877-9066
- Enumerated
- Mar 24, 2022
- Record last updated
- Aug 25, 2025
- Fax
- (864) 241-9224
- Medicare enrollment
- Enrolled (PECOS I20240906000647); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, 2022
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,700 in South Carolina → Look up another NPI →
Also registered at 426 Memorial Drive Ext
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Courtney Carsten, MDFamily Medicine Physician1720462948
- Alicia Gadomski, DOFamily Medicine Physician1144726969
- Lauren PicardFamily Medicine Physician1932804903
Verify Mark Adam Stewart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 88220Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average family medicine physician in 2024
787 Medicare Part D claims for 134 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 28 claims were for opioids.
Most prescribed
- Lisinopril50 claims
- Atorvastatin Calcium44 claims
- Amlodipine Besylate43 claims
- Omeprazole34 claims
- Gabapentin22 claims
- Levothyroxine Sodium22 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 one group practice
- 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).
Mark Adam Stewart among 2,700 family medicine physician records in South Carolina
Mark Adam Stewart, MD 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 2022, is newer than 86% of them.
- NPI issued2022 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2022 · 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
- Thomas Ballard, M.D.Greer, SC 296511932170826
- Aruna Bapat, MDGreer, SC 296511871553206
- William Byars, M.D.Greer, SC 296511336110147
- Courtney Carsten, MDGreer, SC 296511720462948
- Ronald Degarmo, DOGreer, SC 296511316961865
- Alicia Gadomski, DOGreer, SC 296511144726969
- Robert HeckGreer, SC 296511285214973
- Julie Kinsman, M.D.Greer, SC 296511417993346
Common questions
What is Mark Adam Stewart, MD's NPI number?
Mark Adam Stewart, MD's National Provider Identifier (NPI) is 1770233710, issued on Mar 24, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Mark Adam Stewart, MD located?
The NPPES record lists a practice address at 426 Memorial Drive Ext, Greer, SC, 29651. Phone: (864) 877-9066. Providers update this record themselves, so call before visiting.
How can I verify Mark Adam Stewart, MD's license?
NPPES lists South Carolina license number 88220, 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 Adam Stewart, MD prescribe under Medicare Part D?
In 2024, Mark Adam Stewart, MD had 787 Medicare Part D claims for 134 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.