William Breen, M.D.
NPI 1801988449 · Family Medicine Physician · Bangor, ME
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Breen, M.D. is a Family Medicine Physician provider in Bangor, ME (NPI 1801988449).
Provider details
- NPI number
- 1801988449
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- O15905 (ME)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
199 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 76 | $61 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 62 | $91 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 46 | $33 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 15 | $76 |
Typical Medicare-allowed amounts for these services range $33–$91 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Warfarin Sodium | 571 | 159 |
| Warfarin Sodiumbrand: Jantoven | 335 | 101 |
| Prednisone | 65 | 62 |
| Enoxaparin Sodium | 51 | 23 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 24 | 24 |
| Doxycycline Hyclate | 23 | 23 |
| Cephalexin | 17 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-29
- Last updated
- 2014-05-28
Frequently asked questions
- What is William Breen's NPI number?
- William Breen's National Provider Identifier (NPI) is 1801988449, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Breen's specialty?
- William Breen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Breen located?
- William Breen's practice location on file with NPPES is 915 Union St, Bangor, ME 04401-8602.
- What is William Breen's phone number?
- The practice phone number listed in the NPPES registry for William Breen is (207) 973-8030.
- Does William Breen accept Medicare?
- William Breen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Breen's NPI active?
- Yes — William Breen's NPI (1801988449) is active in the NPPES registry as of the last update on 2014-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.