Mark S. Fontaine, O.D.
Optometrist · Leominster, MA
Mark S. Fontaine, O.D. is an optometrist with a practice address in Leominster, Massachusetts, and NPI 1710026943, issued on Feb 5, 2007. Check the license (Massachusetts 3424, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark S. Fontaine
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 3424 MA
Self-reported in NPPES; status is on the state search - Practice location
- 59 N Main St, Leominster, MA 01453
- Phone
- (978) 537-6324
- Enumerated
- Feb 5, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (978) 537-0804
- Medicare enrollment
- Enrolled (PECOS I20081219000015); accepts Medicare assignment
- Medical or professional school
- New England College Of Optometry, 1988
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,501 in Massachusetts → Look up another NPI →
Also registered at 59 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joel Abraham, O.D.Optometrist1326187576
Verify Mark S. Fontaine in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license 3424Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average optometrist in 2024
55 Medicare Part D claims for 23 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 71% of claims.
Most prescribed
- Tobramycin-Dexamethasone24 claims
- Xiidra18 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.
Mark S. Fontaine among 1,501 optometrist records in Massachusetts
Mark S. Fontaine, O.D. is one of 1,501 optometrist records with a practice address in Massachusetts. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 47% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1988 · median 2008 among the 933 with a school on file
- Record last updated2007 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in Massachusetts
There are 1,501 optometrist records in Massachusetts.
All 1,501 in Massachusetts → Every provider in Leominster → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Joel Abraham, O.D.Leominster, MA 014531326187576
- Thedalisa AckepLeominster, MA 014531003748104
- Nahall Larsen, O.D.Leominster, MA 014531619987567
- Thomas Maher, O.D.Leominster, MA 014531053332528
- John Mooney, O.D.Leominster, MA 014531730283292
- Kay Ricciotti, O.D.Leominster, MA 014531699777078
- Paul Shepherd, O.D.Leominster, MA 014531558648279
- Henry Valentine, O.D.Leominster, MA 014531477760163
Common questions
What is Mark S. Fontaine, O.D.'s NPI number?
Mark S. Fontaine, O.D.'s National Provider Identifier (NPI) is 1710026943, issued on Feb 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Fontaine, O.D. located?
The NPPES record lists a practice address at 59 N Main St, Leominster, MA, 01453. Phone: (978) 537-6324. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Fontaine, O.D.'s license?
NPPES lists Massachusetts license number 3424, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Mark S. Fontaine, O.D. prescribe under Medicare Part D?
In 2024, Mark S. Fontaine, O.D. had 55 Medicare Part D claims for 23 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.