Gregory Michael Farrell, OD
- Part D claims, 2024
- 199
- Industry payments
- $37
- Affiliated sites
- 2
- Medical group
- 1
- State license
- 1
- Practice address
- 529 S Patten Road, Patten, ME 04765
- Practice phone
- Call (207) 896-5532
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Katahdin Valley Health Center - Patten (S Patten Rd)
FQHC - Main Site · Patten, Maine
Find Gregory Farrell's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Gregory Michael Farrell is an optometrist in Patten, Maine
Gregory Farrell practices at Katahdin Valley Health Center - Patten (S Patten Rd) in Patten, Maine.
Gregory Farrell's NPI, 1528141348, was assigned on October 23, 2006. Gregory Farrell graduated from New England College of Optometry in 1987. Gregory Farrell holds Maine license OPT739.
- NPI
- 1528141348NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022059237
- NPI enumeration date
- October 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 896-5532
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory Michael Farrell practices at Katahdin Valley Health Center - Patten (S Patten Rd) in Patten, Maine
Gregory Farrell's primary practice is Katahdin Valley Health Center - Patten (S Patten Rd), at 529 S Patten Road, Patten, ME 04765 in Penobscot County. The practice phone is (207) 896-5532.
- Katahdin Valley Health Center - Patten (S Patten Rd)529 S Patten Road, Patten, ME 04765 · Penobscot CountyPhone(207) 896-5532
Source: Dmand AI Affiliation Data
Gregory Michael Farrell is affiliated with 2 sites of care and 1 medical group
Gregory Farrell's primary practice is Katahdin Valley Health Center - Patten (S Patten Rd) in Patten, Maine. The medical group on file is St. Croix Regional Family Health Center. Dmand AI also links Gregory Farrell to 1 more community health center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Gregory Michael Farrell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Farrell practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Katahdin Valley Health Center - Patten (S Patten Rd) | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Gregory Michael Farrell is one of 261 optometrists in Maine
Optometrist is Gregory Farrell's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Gregory Farrell is licensed in Maine.
Specialties and state licenses
- Optometrist, MainePrimary
Optometrists near Gregory Farrell
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Gregory Michael Farrell's patients have a median age of 60
Across all payers, Dmand AI patient panel data puts Gregory Farrell's median patient age at 60, with 57% women.
Gregory Farrell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women57%
- Men42%
Source: Dmand AI Patient Panel Data
Gregory Michael Farrell wrote 199 Medicare Part D claims in 2024
In 2024, Gregory Farrell wrote 199 Medicare Part D claims for 46 patients. 59% of them were for generic drugs.
Gregory Farrell's Part D claims by kind of drug, 2024
- Generic118 claims59%
- Brand-name81 claims41%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Gregory Michael Farrell takes part in Medicare
Gregory Farrell accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Gregory Michael Farrell received $37 in industry payments in 2025
CMS Open Payments shows 2 general payments to Gregory Farrell from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Teva Pharmaceuticals USA, Inc. paid the most, $19.
Companies that paid Gregory Farrell the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Gregory Michael Farrell graduated from New England College of Optometry
Gregory Farrell graduated from New England College of Optometry in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Gregory Michael Farrell's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Gregory Michael Farrell
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gregory Michael Farrell's NPI number?
Gregory Michael Farrell's NPI number is 1528141348. It was assigned on October 23, 2006, and it is active in the NPI Registry.
What does Gregory Michael Farrell specialize in?
Gregory Michael Farrell is an optometrist in Patten, Maine. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Gregory Michael Farrell practice?
Gregory Farrell practices at 529 S Patten Road, Patten, ME 04765. Gregory Farrell's primary practice is Katahdin Valley Health Center - Patten (S Patten Rd) in Patten, Maine. Dmand AI also links Gregory Farrell to 1 community health center.
What is Gregory Michael Farrell's office phone number?
The practice phone on file for Gregory Farrell is (207) 896-5532.
What is Gregory Michael Farrell's medical license number?
Gregory Farrell holds Maine license OPT739.
What medical group is Gregory Michael Farrell part of?
Gregory Farrell is linked to St. Croix Regional Family Health Center.
Does Gregory Michael Farrell accept Medicare?
Yes. CMS lists Gregory Farrell as accepting Medicare assignment.
Where did Gregory Michael Farrell go to medical school?
Gregory Farrell graduated from New England College of Optometry in 1987.
Has Gregory Michael Farrell received payments from drug or device companies?
CMS Open Payments shows $37 in general payments to Gregory Farrell from 2 companies from 2025 to 2025. The largest total came from Teva Pharmaceuticals USA, Inc.
How long has Gregory Michael Farrell been practicing?
Gregory Farrell graduated from medical school in 1987, 39 years ago.
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