Stephen Harris Keiser, MD
Family Medicine Physician · Greenville, SC
Stephen Harris Keiser, MD is a family medicine physician with a practice address in Greenville, South Carolina, and NPI 1659307007, issued on Jun 25, 2006. Check the license (South Carolina 21254, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Stephen Harris Keiser
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 21254 SC
Self-reported in NPPES; status is on the state search - Practice location
- 15 Park Creek Dr, Greenville, SC 29605
- Phone
- (864) 271-7761
- Enumerated
- Jun 25, 2006
- Record last updated
- Oct 24, 2025
- Fax
- (864) 235-2045
- Medicaid ID
- T54562 SC
- Medicare enrollment
- Enrolled (PECOS I20090731000448); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,700 in South Carolina → Look up another NPI →
Also registered at 15 Park Creek Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margaret Acres, APRNNurse Practitioner1700086840
- Benjamin Bowles, NPNurse Practitioner1174036909
- Kristen Brooks, NPFamily Nurse Practitioner1396262820
- Kimberly Burgess, MDUrology Physician1578760450
- Matthew Coponen, FNPFamily Nurse Practitioner1457116188
- Gabriel FiscusUrology Physician1245673466
Verify Stephen Harris Keiser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 21254Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average family medicine physician in 2024
2,198 Medicare Part D claims for 203 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 41 claims were for opioids.
Most prescribed
- Amlodipine Besylate135 claims
- Atorvastatin Calcium117 claims
- Lisinopril101 claims
- Rosuvastatin Calcium93 claims
- Losartan Potassium88 claims
- Levothyroxine Sodium71 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).
Stephen Harris Keiser among 2,700 family medicine physician records in South Carolina
Stephen Harris Keiser, 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1991 · 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).
217 family medicine physician records list a practice address in Greenville
They are 217 of the 10,264 NPPES records with a practice address in Greenville, and 2,700 family medicine physician records in South Carolina.
All 2,700 in South Carolina → Every provider in Greenville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ronald Ashton, M.D.Greenville, SC 296051902845886
- Peter Carek, MDGreenville, SC 296051255449294
- Gregrey Compton, MDGreenville, SC 296051134220114
- Paul FreelGreenville, SC 296051528088721
- Nurul Islam, M.D.Greenville, SC 296051861585580
- Allan Macdonald, MDGreenville, SC 296051275591216
- Phyllis Macgilvray, MDGreenville, SC 296051528043320
- Christopher McCarthy, M.D.Greenville, SC 296051881612224
Common questions
What is Stephen Harris Keiser, MD's NPI number?
Stephen Harris Keiser, MD's National Provider Identifier (NPI) is 1659307007, issued on Jun 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Harris Keiser, MD located?
The NPPES record lists a practice address at 15 Park Creek Dr, Greenville, SC, 29605. Phone: (864) 271-7761. Providers update this record themselves, so call before visiting.
How can I verify Stephen Harris Keiser, MD's license?
NPPES lists South Carolina license number 21254, 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 Stephen Harris Keiser, MD prescribe under Medicare Part D?
In 2024, Stephen Harris Keiser, MD had 2,198 Medicare Part D claims for 203 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.