William Calhoun, MD
Cardiovascular Disease Physician · South Weymouth, MA
William Calhoun, MD is a cardiovascular disease physician with a practice address in South Weymouth, Massachusetts, and NPI 1952324303, issued on Jul 26, 2006. Check the license (Massachusetts 53819, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Calhoun
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 53819 MA
Self-reported in NPPES; status is on the state search - Practice location
- 70 Pleasant St, South Weymouth, MA 02190
- Phone
- (781) 331-2000
- Enumerated
- Jul 26, 2006
- Record last updated
- Jul 8, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (781) 337-6104
- Medicaid ID
- 3034135 MA
- Medicare enrollment
- Enrolled (PECOS I20050406001169); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 1983
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,080 in Massachusetts → Look up another NPI →
Also registered at 70 Pleasant St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joshua Arkin, MDCardiovascular Disease Physician1821315060
- Wendy Johnson, MDCardiovascular Disease Physician1942224654
- Pranitha Reddy, M.D.Cardiovascular Disease Physician1154564227
- Alexei Shvilkin, M.D.Clinical Cardiac Electrophysiology Physician1336107390
Verify William Calhoun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 53819Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
2,643 Medicare Part D claims for 328 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Metoprolol Succinate535 claims
- Eliquis311 claims
- Lisinopril248 claims
- Atorvastatin Calcium228 claims
- Amlodipine Besylate148 claims
- Losartan Potassium131 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): 77.2 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
- South Shore Medical Center, Inc.Weymouth, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Calhoun among 1,080 cardiovascular disease physician records in Massachusetts
William Calhoun, MD is one of 1,080 cardiovascular disease physician records with a practice address in Massachusetts. 75% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1983 · median 2001 among the 698 with a school on file
- Record last updated2013 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 cardiovascular disease physician records list a practice address in South Weymouth
They are 13 of the 445 NPPES records with a practice address in South Weymouth, and 1,080 cardiovascular disease physician records in Massachusetts.
All 1,080 in Massachusetts → Every provider in South Weymouth → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- J. Corrodi, MDSouth Weymouth, MA 021901457351330
- Themy Dumlao, M.D.Weymouth, MA 021901558556217
- Ronald Dunlap, M.D.Weymouth, MA 021901053358259
- Susan Feinstein, MDSouth Weymouth, MA 021901508843533
- Mark Furman, M.D.S Weymouth, MA 021901740263672
- Peter Grape, MDSouth Weymouth, MA 021901346249000
- Michael Hession, MDSouth Weymouth, MA 021901922085158
- Peter Hoshino, MDSouth Weymouth, MA 021901831176064
Common questions
What is William Calhoun, MD's NPI number?
William Calhoun, MD's National Provider Identifier (NPI) is 1952324303, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Calhoun, MD located?
The NPPES record lists a practice address at 70 Pleasant St, South Weymouth, MA, 02190. Phone: (781) 331-2000. Providers update this record themselves, so call before visiting.
How can I verify William Calhoun, MD's license?
NPPES lists Massachusetts license number 53819, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Calhoun, MD prescribe under Medicare Part D?
In 2024, William Calhoun, MD had 2,643 Medicare Part D claims for 328 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is William Calhoun, MD's MIPS final score?
The 2023 MIPS final score is 77.2 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.