William Gregory Feero, MD, PHD
Family Medicine Physician · Westbrook, ME
William Gregory Feero, MD, PHD is a family medicine physician with a practice address in Westbrook, Maine, and NPI 1285600239, issued on Feb 28, 2006. Check the license (Maine MD15570, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Gregory Feero
- Credential
- MD, PHD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD15570 ME
Self-reported in NPPES; status is on the state search - Practice location
- 1 Harnois Ave Ste 1B, Westbrook, ME 04092
- Phone
- (207) 662-1340
- Enumerated
- Feb 28, 2006
- Record last updated
- May 7, 2026
- Fax
- (207) 662-1341
- Medicaid ID
- 313560099 ME
- Medicare enrollment
- Enrolled (PECOS I20050531000562); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,172 in Maine → Look up another NPI →
Also registered at 1 Harnois Ave Ste 1B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patrick Fleming, MDInternal Medicine Physician1205538402
- Helen Hackett, FNP-CFamily Nurse Practitioner1508713868
- Travis Hallett, MDInternal Medicine Physician1710513726
Verify William Gregory Feero in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD15570Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average family medicine physician in 2024
2,957 Medicare Part D claims for 262 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 256 claims were for opioids.
Most prescribed
- Atorvastatin Calcium188 claims
- Amlodipine Besylate108 claims
- Sertraline Hcl99 claims
- Omeprazole95 claims
- Levothyroxine Sodium89 claims
- Hydrochlorothiazide84 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Mainegeneral Medical CenterFairfield, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Gregory Feero among 1,172 family medicine physician records in Maine
William Gregory Feero, MD, PHD is one of 1,172 family medicine physician records with a practice address in Maine. 76% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 52% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1998 · median 2008 among the 668 with a school on file
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 family medicine physician records list a practice address in Westbrook
They are 11 of the 559 NPPES records with a practice address in Westbrook, and 1,172 family medicine physician records in Maine.
All 1,172 in Maine → Every provider in Westbrook → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Douglas Aiken, MDWestbrook, ME 040921093774119
- Ronald Ashkenasy, D.O..Westbrook, ME 040921376580647
- Dianna Gagnon, MDWestbrook, ME 040921184283665
- Marc Kimball, M.D.Westbrook, ME 040921467815274
- Catherine Lockwood, MDWestbrook, ME 040921750340154
- Debra Lumbert, M.D.Westbrook, ME 040921710928858
- Geraldine Ollila, D.O.Westbrook, ME 040921043252364
- Kristina Parisien, M.D.Westbrook, ME 040921124061726
Common questions
What is William Gregory Feero, MD, PHD's NPI number?
William Gregory Feero, MD, PHD's National Provider Identifier (NPI) is 1285600239, issued on Feb 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Gregory Feero, MD, PHD located?
The NPPES record lists a practice address at 1 Harnois Ave Ste 1B, Westbrook, ME, 04092. Phone: (207) 662-1340. Providers update this record themselves, so call before visiting.
How can I verify William Gregory Feero, MD, PHD's license?
NPPES lists Maine license number MD15570, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Gregory Feero, MD, PHD prescribe under Medicare Part D?
In 2024, William Gregory Feero, MD, PHD had 2,957 Medicare Part D claims for 262 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is William Gregory Feero, MD, PHD's MIPS final score?
The 2023 MIPS final score is 79.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.