Harvard Keith Riddle, M.D.
Ophthalmology Physician · Clinton, SC
Harvard Keith Riddle, M.D. is an ophthalmology physician with a practice address in Clinton, South Carolina, and NPI 1134155955, issued on Jun 23, 2006. Check the license (South Carolina 17588, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Harvard Keith Riddle
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 17588 SC
Self-reported in NPPES; status is on the state search - Practice location
- 22995 Highway 76 E, Clinton, SC 29325
- Phone
- (864) 833-0038
- Enumerated
- Jun 23, 2006
- Record last updated
- Apr 24, 2026
- Fax
- (864) 833-0520
- Medicaid ID
- 175884 SC
- Medicare enrollment
- Enrolled (PECOS I20100721000809); accepts Medicare assignment
- Medical or professional school
- Medical University Of South Carolina College Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 329 in South Carolina → Look up another NPI →
Verify Harvard Keith 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 17588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% more Medicare Part D claims than the average ophthalmology physician in 2024
2,781 Medicare Part D claims for 897 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims. 15 claims were for opioids.
Most prescribed
- Prednisolone Acetate694 claims
- Latanoprost624 claims
- Brimonidine Tartrate226 claims
- Dorzolamide-Timolol171 claims
- Moxifloxacin146 claims
- Neomycin-Polymyxin-Dexameth127 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.
Industry payments in 2024: $956.45
31 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 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
- Clemson Eye PAGreenville, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Harvard Keith Riddle among 329 ophthalmology physician records in South Carolina
Harvard Keith Riddle, M.D. is one of 329 ophthalmology physician records with a practice address in South Carolina. 79% 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 16% of them.
- NPI issued2006 · 16% of these records are older, 43% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1993 · median 2002 among the 219 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in South Carolina
There are 329 ophthalmology physician records in South Carolina.
All 329 in South Carolina → Every provider in Clinton → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Samuel Montgomery, M.D.Clinton, SC 293251467488551
- Matthew Bickford, MDBoiling Springs, SC 293161750841383
- Jake Bostrom, M.D.Boiling Springs, SC 293161295886125
- Brice Dille, M.D.Boiling Springs, SC 293161437151990
- Todd Gwin, MDBoiling Springs, SC 293161225030208
- Billy Haguewood, M.D.Boiling Springs, SC 293161992708135
- Karen Wickliffe-Keisler, M.D.Boiling Springs, SC 293161235333634
- Michael Holmes, M.D.Spartanburg, SC 293071063415214
Common questions
What is Harvard Keith Riddle, M.D.'s NPI number?
Harvard Keith Riddle, M.D.'s National Provider Identifier (NPI) is 1134155955, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harvard Keith Riddle, M.D. located?
The NPPES record lists a practice address at 22995 Highway 76 E, Clinton, SC, 29325. Phone: (864) 833-0038. Providers update this record themselves, so call before visiting.
How can I verify Harvard Keith Riddle, M.D.'s license?
NPPES lists South Carolina license number 17588, 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 Harvard Keith Riddle, M.D. prescribe under Medicare Part D?
In 2024, Harvard Keith Riddle, M.D. had 2,781 Medicare Part D claims for 897 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.