Samuel M. Riddle, M.D.
Obstetrics & Gynecology Physician · Sumter, SC
Samuel M. Riddle, M.D. is an obstetrics & gynecology physician with a practice address in Sumter, South Carolina, and NPI 1134188238, issued on Mar 20, 2006. Check the license (South Carolina 12846, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Samuel M. Riddle
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 12846 SC
Self-reported in NPPES; status is on the state search - Practice location
- 115 N Sumter St, Sumter, SC 29150
- Phone
- (803) 775-8351
- Enumerated
- Mar 20, 2006
- Record last updated
- Dec 4, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (803) 774-1512
- Medicaid ID
- 128463 SC
- Medicare enrollment
- Enrolled (PECOS I20050121000043); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 1978
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 752 in South Carolina → Look up another NPI →
Also registered at 115 N Sumter St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mark Crabbe, MDSurgery Physician1619921905
- Gene Dickerson, MDSurgery Physician1386698652
- James Ellett, MDSpecialist1639123961
- William Epps Jr., MDCardiovascular Disease Physician1912948498
Verify Samuel M. Riddle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 12846Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
84 Medicare Part D claims for 42 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol16 claims
- Fluconazole16 claims
- Nystatin13 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).
Industry payments in 2024: $97.25
5 payments; by number, the most common kind was food and beverage; the largest payer was Kerecis Limited. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Prisma Health Medical Group-MidlandsSumter, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Samuel M. Riddle among 752 obstetrics & gynecology physician records in South Carolina
Samuel M. Riddle, M.D. is one of 752 obstetrics & gynecology physician records with a practice address in South Carolina. 80% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 54% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1978 · median 2006 among the 477 with a school on file
- Record last updated2018 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in South Carolina
There are 752 obstetrics & gynecology physician records in South Carolina.
All 752 in South Carolina → Every provider in Sumter → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Kristin Bell, DOSumter, SC 291501467891051
- Giselle Chandler, MDSumter, SC 291501629100573
- Arvie Collins, M.D.Sumter, SC 291501306869219
- Jessica CunninghamSumter, SC 291501144960055
- Thomas Hepfer, M.D.Sumter, SC 291501811956915
- Mark Hucks, MDSumter, SC 291501902839301
- Jill McLeod, M.D.Sumter, SC 291501861704082
- George Smith, M.D.Sumter, SC 291501053370155
Common questions
What is Samuel M. Riddle, M.D.'s NPI number?
Samuel M. Riddle, M.D.'s National Provider Identifier (NPI) is 1134188238, issued on Mar 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Samuel M. Riddle, M.D. located?
The NPPES record lists a practice address at 115 N Sumter St, Sumter, SC, 29150. Phone: (803) 775-8351. Providers update this record themselves, so call before visiting.
How can I verify Samuel M. Riddle, M.D.'s license?
NPPES lists South Carolina license number 12846, 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 Samuel M. Riddle, M.D. prescribe under Medicare Part D?
In 2024, Samuel M. Riddle, M.D. had 84 Medicare Part D claims for 42 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Samuel M. Riddle, M.D.'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.