Peter Knowlton, M.D.
NPI 1740523604 · Ophthalmology Physician · Charleston, SC
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Knowlton, M.D. is a Ophthalmology Physician provider in Charleston, SC (NPI 1740523604).
Provider details
- NPI number
- 1740523604
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 51384 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,013 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 948 | $116 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 869 | $85 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 394 | $119 |
| Imaging of Optic Nerve92133 | 374 | $34 |
| Imaging of Retina92134 | 368 | $37 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 183 | $37 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 687 | 260 |
| Brimonidine Tartrate | 249 | 79 |
| Timolol Maleate | 220 | 83 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 215 | 72 |
| Bimatoprostbrand: Lumigan | 189 | 59 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 176 | 121 |
| Cyclosporinebrand: Restasis | 127 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$616 across 21 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-29
- Last updated
- 2022-03-07
- Certified
- 2022-03-07
Frequently asked questions
- What is Peter Knowlton's NPI number?
- Peter Knowlton's National Provider Identifier (NPI) is 1740523604, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Knowlton's specialty?
- Peter Knowlton is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Knowlton located?
- Peter Knowlton's practice location on file with NPPES is 1637 Savannah Hwy, Charleston, SC 29407-6282.
- What is Peter Knowlton's phone number?
- The practice phone number listed in the NPPES registry for Peter Knowlton is (843) 884-2015.
- Does Peter Knowlton accept Medicare?
- Peter Knowlton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Knowlton's NPI active?
- Yes — Peter Knowlton's NPI (1740523604) is active in the NPPES registry as of the last update on 2022-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.