Mark Stewart, MD
NPI 1770233710 · Family Medicine Physician · Greer, SC
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Stewart, MD is a Family Medicine Physician provider in Greer, SC (NPI 1770233710).
Provider details
- NPI number
- 1770233710
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 50 | 14 |
| Atorvastatin Calcium | 44 | 13 |
| Amlodipine Besylate | 43 | 17 |
| Omeprazole | 34 | — |
| Gabapentin | 22 | — |
| Levothyroxine Sodium | 22 | — |
| Valsartan | 20 |
Practice location
Mailing address
Additional practice locations (1)
- 2000 E Greenville St Ste 3700Anderson, SC 29621-1725Phone: (864) 512-1916
Registry dates
- Enumerated
- 2022-03-24
- Last updated
- 2025-08-25
- Certified
- 2025-08-25
Frequently asked questions
- What is Mark Stewart's NPI number?
- Mark Stewart's National Provider Identifier (NPI) is 1770233710, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Stewart's specialty?
- Mark Stewart is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Stewart located?
- Mark Stewart's practice location on file with NPPES is 426 Memorial Drive Ext, Greer, SC 29651-1818.
- What is Mark Stewart's phone number?
- The practice phone number listed in the NPPES registry for Mark Stewart is (864) 877-9066.
- Does Mark Stewart accept Medicare?
- Mark Stewart is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Stewart's NPI active?
- Yes — Mark Stewart's NPI (1770233710) is active in the NPPES registry as of the last update on 2025-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.