Peter Knowlton, M.D.
Ophthalmology Physician · Charleston, SC
Peter Knowlton, M.D. is an ophthalmology physician with a practice address in Charleston, South Carolina, and NPI 1740523604, issued on Mar 29, 2013. Check the license (South Carolina 51384, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Peter Knowlton
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 51384 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1637 Savannah Hwy, Charleston, SC 29407
- Phone
- (843) 884-2015
- Enumerated
- Mar 29, 2013
- Record last updated
- Mar 7, 2022
- Fax
- (843) 856-9944
- Medicare enrollment
- Enrolled (PECOS I20170911000923); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 329 in South Carolina → Look up another NPI →
Also registered at 1637 Savannah Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Milton Hudson, D.C.Chiropractor1700800968
- Robert Peyser, M.D.Ophthalmology Physician1902826571
Verify Peter Knowlton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 51384Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% more Medicare Part D claims than the average ophthalmology physician in 2024
2,822 Medicare Part D claims for 740 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Latanoprost687 claims
- Brimonidine Tartrate249 claims
- Timolol Maleate220 claims
- Dorzolamide-Timolol215 claims
- Lumigan189 claims
- Neomycin-Polymyxin-Dexameth176 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): 75.7 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: $615.82
21 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
- Carolina Eyecare Physicians LLCMt Pleasant, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter Knowlton among 329 ophthalmology physician records in South Carolina
Peter Knowlton, 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 2013, is newer than 78% of them.
- NPI issued2013 · 78% of these records are older, 19% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2013 · median 2002 among the 219 with a school on file
- Record last updated2022 · 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 Charleston → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Robert Peyser, M.D.Charleston, SC 294071902826571
- Karen Ullian, M.D.Charleston, SC 294071790783413
- Robert Brame, MDN Charleston, SC 294061851318661
- Paul Grant, MDN Charleston, SC 294061760598007
- Paul Herring, MDN Charleston, SC 294061902829625
- Leslie Scarlett, M.D.N Charleston, SC 294061871676684
- Sidney Seltzer, M.D.Charleston, SC 294061376732826
- Alexander Kent, M.D.Charleston, SC 294031770529539
Common questions
What is Peter Knowlton, M.D.'s NPI number?
Peter Knowlton, M.D.'s National Provider Identifier (NPI) is 1740523604, issued on Mar 29, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Peter Knowlton, M.D. located?
The NPPES record lists a practice address at 1637 Savannah Hwy, Charleston, SC, 29407. Phone: (843) 884-2015. Providers update this record themselves, so call before visiting.
How can I verify Peter Knowlton, M.D.'s license?
NPPES lists South Carolina license number 51384, 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 Peter Knowlton, M.D. prescribe under Medicare Part D?
In 2024, Peter Knowlton, M.D. had 2,822 Medicare Part D claims for 740 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Peter Knowlton, M.D.'s MIPS final score?
The 2023 MIPS final score is 75.7 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.