William Hassett, MD
NPI 1386683001 · Family Medicine Physician · Dover, NH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hassett, MD is a Family Medicine Physician provider in Dover, NH (NPI 1386683001).
Provider details
- NPI number
- 1386683001
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 9418 (NH)
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
20 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
1,150 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 436 | $127 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 167 | $129 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 90 | $88 |
| Administration of Influenza Virus VaccineG0008 | 81 | $32 |
| Hemoglobin A1c Level83036 | 76 | $10 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians and |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 101 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 496 | 151 |
| Amlodipine Besylate | 336 | 103 |
| Losartan Potassium | 313 | 89 |
| Levothyroxine Sodium | 289 | 73 |
| Simvastatin | 219 | 60 |
| Metformin Hclbrand: Metformin Hcl Er | 217 | 64 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2014-02-20
Frequently asked questions
- What is William Hassett's NPI number?
- William Hassett's National Provider Identifier (NPI) is 1386683001, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hassett's specialty?
- William Hassett is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Hassett located?
- William Hassett's practice location on file with NPPES is 10 Members Way, Dover, NH 03820-5933.
- What is William Hassett's phone number?
- The practice phone number listed in the NPPES registry for William Hassett is (603) 742-3174.
- Does William Hassett accept Medicare?
- William Hassett is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hassett's NPI active?
- Yes — William Hassett's NPI (1386683001) is active in the NPPES registry as of the last update on 2014-02-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.