Gregory Michael Farrell, O.D.
Optometrist · Princeton, ME
Gregory Michael Farrell, O.D. is an optometrist with a practice address in Princeton, Maine, and NPI 1528141348, issued on Oct 23, 2006. Check the license (Maine OPT739, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory Michael Farrell
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT739 ME
Self-reported in NPPES; status is on the state search - Practice location
- 136 Mill St, Princeton, ME 04668
- Phone
- (207) 796-5033
- Enumerated
- Oct 23, 2006
- Record last updated
- Aug 27, 2025
- Fax
- (207) 796-5528
- Medicaid ID
- 151320000 ME
- Medicare enrollment
- Enrolled (PECOS I20050518000653); accepts Medicare assignment
- Medical or professional school
- New England College Of Optometry, 1987
- Entity
- Type 1 · individual
8 nearest optometrist records → All 310 in Maine → Look up another NPI →
Also registered at 136 Mill St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Phylicia Bonavida, NP-CFamily Nurse Practitioner1710456439
- Anne Cassidy, LPNLicensed Practical Nurse1346225158
- Beth Chabre, NPFamily Nurse Practitioner1952826042
- Lawrence Crystal, DPMPodiatrist1508814450
- Deborah Daggett, L.A.D.CAddiction (Substance Use Disorder) Counselor1891129664
- Jonathan Dudek, PH.D.Clinical Psychologist1356687040
Verify Gregory Michael Farrell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license OPT739Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average optometrist in 2024
199 Medicare Part D claims for 46 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Latanoprost69 claims
- Lumigan51 claims
- Timolol Maleate17 claims
- Tobramycin-Dexamethasone13 claims
- Brimonidine Tartrate11 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
- St Croix Regional Family Health CenterPrinceton, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Michael Farrell among 310 optometrist records in Maine
Gregory Michael Farrell, O.D. 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 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 50% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1987 · median 2008 among the 212 with a school on file
- Record last updated2025 · 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).
1 optometrist record lists a practice address in Princeton
They are 1 of the 33 NPPES records with a practice address in Princeton, and 310 optometrist records in Maine.
All 310 in Maine → Every provider in Princeton → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Thomas Crawford, O.D.Milbridge, ME 046581366467573
- Brian Hallowell, ODCalais, ME 046191851308977
- Jennifer Kehrer, ODCalais, ME 046191902258361
- Robert Macmannis, ODCalais, ME 046191295742989
- Carina Orcutt, O.D.Calais, ME 046191407004864
- Richard Goodwin, O.D.Houlton, ME 047301275727570
- Tonya Newman-Farrell, O.D.Houlton, ME 047301790811677
- Jessica Philbrook, O.D.Houlton, ME 047301992899884
Common questions
What is Gregory Michael Farrell, O.D.'s NPI number?
Gregory Michael Farrell, O.D.'s National Provider Identifier (NPI) is 1528141348, issued on Oct 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Michael Farrell, O.D. located?
The NPPES record lists a practice address at 136 Mill St, Princeton, ME, 04668. Phone: (207) 796-5033. Providers update this record themselves, so call before visiting.
How can I verify Gregory Michael Farrell, O.D.'s license?
NPPES lists Maine license number OPT739, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory Michael Farrell, O.D. prescribe under Medicare Part D?
In 2024, Gregory Michael Farrell, O.D. had 199 Medicare Part D claims for 46 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.