John Marc Hamilton
Optometrist · Gray, ME
John Marc Hamilton is an optometrist with a practice address in Gray, Maine, and NPI 1154949345, issued on Jul 14, 2020. Check the license (Maine OPT1031, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Marc Hamilton
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT1031 ME
Self-reported in NPPES; status is on the state search - Practice location
- 6 Turnpike Acres RD, Gray, ME 04039
- Phone
- (207) 657-4488
- Enumerated
- Jul 14, 2020
- Record last updated
- Dec 14, 2022
- Medicare enrollment
- Enrolled (PECOS I20201029002547); accepts Medicare assignment
- Medical or professional school
- New England College Of Optometry, 2020
- Entity
- Type 1 · individual
8 nearest optometrist records → All 310 in Maine → Look up another NPI →
Also registered at 6 Turnpike Acres RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leo Credit, PTPhysical Therapist1477509115
- Mary Feltovic, PT, DPTPhysical Therapist1932149085
- David Guiseley, O.D.Optometrist1558378737
Verify John Marc Hamilton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license OPT1031Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average optometrist in 2024
75 Medicare Part D claims for 40 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.
Most prescribed
- Latanoprost21 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.
Bills Medicare through one group practice
- Gray Family Vision Center, P.A.Gray, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Marc Hamilton among 310 optometrist records in Maine
John Marc Hamilton is one of 310 optometrist records with a practice address in Maine. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 84% of them.
- NPI issued2020 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2020 · median 2008 among the 212 with a school on file
- Record last updated2022 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 optometrist records list a practice address in Gray
They are 3 of the 80 NPPES records with a practice address in Gray, and 310 optometrist records in Maine.
All 310 in Maine → Every provider in Gray → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Jonathan Cook, ODGray, ME 040391194714733
- David Guiseley, O.D.Gray, ME 040391558378737
- Michelle Cote-Brzoza, ODGorham, ME 040381932107620
- Brittany Cousins, ODGorham, ME 040381770472128
- Alan Mathieu, O.D.Gorham, ME 040381457367419
- Dejan Varagic, ODGorham, ME 040381558930115
- Jacqueline Wills, ODGorham, ME 040381790354009
- Norman Ferguson, ODFryeburg, ME 040371174592919
Common questions
What is John Marc Hamilton's NPI number?
John Marc Hamilton's National Provider Identifier (NPI) is 1154949345, issued on Jul 14, 2020. An NPI identifies a provider in billing; it is not a license.
Where is John Marc Hamilton located?
The NPPES record lists a practice address at 6 Turnpike Acres RD, Gray, ME, 04039. Phone: (207) 657-4488. Providers update this record themselves, so call before visiting.
How can I verify John Marc Hamilton's license?
NPPES lists Maine license number OPT1031, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
How much does John Marc Hamilton prescribe under Medicare Part D?
In 2024, John Marc Hamilton had 75 Medicare Part D claims for 40 beneficiaries; the average among optometrist prescribers was 277. 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.