William Marks, M.D.
NPI 1356337448 · Ophthalmology Physician · Canton, GA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Marks, M.D. is a Ophthalmology Physician provider in Canton, GA (NPI 1356337448).
Provider details
- NPI number
- 1356337448
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 030829 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$295 across 2 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
- 2005-09-23
- Last updated
- 2010-07-14
Frequently asked questions
- What is William Marks's NPI number?
- William Marks's National Provider Identifier (NPI) is 1356337448, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Marks's specialty?
- William Marks is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is William Marks located?
- William Marks's practice location on file with NPPES is 125 Oakside Ct, Canton, GA 30114-2498.
- What is William Marks's phone number?
- The practice phone number listed in the NPPES registry for William Marks is (678) 880-0662.
- Does William Marks accept Medicare?
- William Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Marks's NPI active?
- Yes — William Marks's NPI (1356337448) is active in the NPPES registry as of the last update on 2010-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.