NPPES file of Aug 9, 2026

William Joseph Breen, M.D.

Family Medicine Physician · Bangor, ME

William Joseph Breen, M.D. is a family medicine physician with a practice address in Bangor, Maine, and NPI 1801988449, issued on Sep 29, 2006. Check the license (Maine O15905, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1801988449
Name
William Joseph Breen
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
O15905 ME
Self-reported in NPPES; status is on the state search
Practice location
915 Union St, Bangor, ME 04401
Phone
(207) 973-8030
Enumerated
Sep 29, 2006
Record last updated
May 28, 2014 (not updated in 12 years: call before relying on the address or phone)
Medicaid ID
30000020099 ME
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 915 Union St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Alexandra Ainsworth, PA-CPhysician Assistant1194045153
  2. Robert Cravens, FNPFamily Nurse Practitioner1629131867
  3. Michael Green, M.D.Emergency Medicine Physician1902813140
  4. Claire Mooney, NPFamily Nurse Practitioner1699715417
  5. Michelle Pickoski-Capuano, FNPCFamily Nurse Practitioner1326610551
  6. Joseph Sardina, MDFamily Medicine Physician1831294107

Verify William Joseph Breen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
    Search for license O15905    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Maine license search

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66% fewer Medicare Part D claims than the average family medicine physician in 2024

1,212 Medicare Part D claims for 424 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.

  1. William Breen1,212
  2. Specialty average3,544

Most prescribed

  1. Warfarin Sodium571 claims
  2. Jantoven335 claims
  3. Prednisone65 claims
  4. Enoxaparin Sodium51 claims
  5. Albuterol Sulfate Hfa24 claims
  6. Doxycycline Hyclate23 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.

81 family medicine physician records list a practice address in Bangor

They are 81 of the 3,103 NPPES records with a practice address in Bangor, and 1,172 family medicine physician records in Maine.

All 81 in Bangor → All 1,172 in Maine → Every provider in Bangor →

Other family medicine physician records in Maine

  1. Jeffrey Aalberg, MDFalmouth, ME1669400222
  2. Elizabeth Abbas, DOFarmington, ME1932588100
  3. Robert Abrams, M.D.Lubec, ME1720067010
  4. Andrea Abrell, DOAugusta, ME1558525188
  5. Justine Achille, MDGorham, ME1962962324
  6. Katie Adams, MDLincoln, ME1154764975
  7. Thomas Adams, MDSouthwest Harbor, ME1851331565
  8. Rebecca Adamson, MDLewiston, ME1912313982
  9. Constance Adler, M.D., F.A.A.F.P.Farmington, ME1487689675
  10. Devesh Agarwal, M.D.Lincoln, ME1710116876

Common questions

What is William Joseph Breen, M.D.'s NPI number?

William Joseph Breen, M.D.'s National Provider Identifier (NPI) is 1801988449, issued on Sep 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William Joseph Breen, M.D. located?

The NPPES record lists a practice address at 915 Union St, Bangor, ME, 04401. Phone: (207) 973-8030. Providers update this record themselves, so call before visiting.

How can I verify William Joseph Breen, M.D.'s license?

NPPES lists Maine license number O15905, 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 Joseph Breen, M.D. prescribe under Medicare Part D?

In 2024, William Joseph Breen, M.D. had 1,212 Medicare Part D claims for 424 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.