William Calhoun, MD
NPI 1952324303 · Cardiovascular Disease Physician · South Weymouth, MA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Calhoun, MD is a Cardiovascular Disease Physician provider in South Weymouth, MA (NPI 1952324303).
Provider details
- NPI number
- 1952324303
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 53819 (MA)
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
3,475 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 1,051 | $8 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 700 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 502 | $140 |
| Blood Test, Clotting Time85610 | 241 | $4 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 200 | $221 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 535 | 165 |
| Apixabanbrand: Eliquis | 311 | 69 |
| Lisinopril | 248 | 74 |
| Atorvastatin Calcium | 228 | 69 |
| Amlodipine Besylate | 148 | 44 |
| Losartan Potassium | 131 | 42 |
| Furosemide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-26
- Last updated
- 2013-07-08
Frequently asked questions
- What is William Calhoun's NPI number?
- William Calhoun's National Provider Identifier (NPI) is 1952324303, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Calhoun's specialty?
- William Calhoun is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Calhoun located?
- William Calhoun's practice location on file with NPPES is 70 Pleasant St, South Weymouth, MA 02190-2427.
- What is William Calhoun's phone number?
- The practice phone number listed in the NPPES registry for William Calhoun is (781) 331-2000.
- Does William Calhoun accept Medicare?
- William Calhoun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Calhoun's NPI active?
- Yes — William Calhoun's NPI (1952324303) is active in the NPPES registry as of the last update on 2013-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.