Michael J. Mazzini, M.D.
Clinical Cardiac Electrophysiology Physician · Boston, MA
Michael J. Mazzini, M.D. is a clinical cardiac electrophysiology physician with a practice address in Boston, Massachusetts, and NPI 1073551354, issued on Jun 2, 2006. Check the license (Massachusetts 223341, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael J. Mazzini
- Credential
- M.D.
- Primary taxonomy
- Clinical Cardiac Electrophysiology Physician 207RC0001X
- License numbers
- 223341 MA
20159 NH
Self-reported in NPPES; status is on the state search - Practice location
- 732 Harrison Ave, Boston, MA 02118
- Phone
- (617) 638-7490
- Enumerated
- Jun 2, 2006
- Record last updated
- Jan 24, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (617) 414-8742
- Medicaid IDs
- 110086025A MA
3119927 NH - Medicare enrollment
- Enrolled (PECOS I20200213002324); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 2002
- Entity
- Type 1 · individual
8 nearest clinical cardiac electrophysiology physician records → All 116 in Massachusetts → Look up another NPI →
Also registered at 732 Harrison Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Katy Bockstall, M.D.Cardiovascular Disease Physician1952676058
- John Bostrom, M.D.Cardiovascular Disease Physician1477087021
Verify Michael J. Mazzini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 223341Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average clinical cardiac electrophysiology physician in 2024
1,558 Medicare Part D claims for 277 beneficiaries, against an average of 1,710 among the 3,173 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims.
Most prescribed
- Eliquis354 claims
- Metoprolol Succinate247 claims
- Xarelto105 claims
- Lisinopril82 claims
- Atorvastatin Calcium57 claims
- Entresto54 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.
Industry payments in 2024: $123.31
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 3,167 providers of this specialty with any payment received $10,651.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Massachusetts General Physicians Organization IncBoston, MA
- Wentworth Douglass Physician CorporationDover, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael J. Mazzini among 116 clinical cardiac electrophysiology physician records in Massachusetts
Michael J. Mazzini, M.D. is one of 116 clinical cardiac electrophysiology physician records with a practice address in Massachusetts. 89% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 56% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated2002 · median 2002 among the 93 with a school on file
- Record last updated2020 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0001X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Cardiac Electrophysiology Physician providers in Massachusetts
There are 116 clinical cardiac electrophysiology physician records in Massachusetts.
All 116 in Massachusetts → Every provider in Boston → Clinical Cardiac Electrophysiology Physician nationwide →
The 8 clinical cardiac electrophysiology physician records with the nearest ZIP codes
- Jameel Ahmed, MDBoston, MA 021181326094996
- Gilson Costa Fernandes Filho, M.D.Boston, MA 021181194106369
- Robert Helm, M.D.Boston, MA 021181235275991
- Ankur Karnik, MDBoston, MA 021181174687495
- Kevin Monahan, M.D.Boston, MA 021181720065477
- Derin Tugal, M.D.Boston, MA 021181336466523
- Dominic Abrams, BSC MBBS MRCP MDBoston, MA 021151821372228
- Kolade Agboola, MDBoston, MA 021151356791644
Common questions
What is Michael J. Mazzini, M.D.'s NPI number?
Michael J. Mazzini, M.D.'s National Provider Identifier (NPI) is 1073551354, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Mazzini, M.D. located?
The NPPES record lists a practice address at 732 Harrison Ave, Boston, MA, 02118. Phone: (617) 638-7490. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Mazzini, M.D.'s license?
NPPES lists Massachusetts license number 223341, 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 Michael J. Mazzini, M.D. prescribe under Medicare Part D?
In 2024, Michael J. Mazzini, M.D. had 1,558 Medicare Part D claims for 277 beneficiaries; the average among clinical cardiac electrophysiology physician prescribers was 1,710. 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.
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.