Stephanos Vassilopoulos, MD
Infectious Disease Physician · Boston, MA
Stephanos Vassilopoulos, MD is an infectious disease physician with a practice address in Boston, Massachusetts, and NPI 1801586631, issued on May 15, 2023. Check the license (Massachusetts 3019979, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Stephanos Vassilopoulos
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 3019979 MA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Fruit St, Boston, MA 02114
- Phone
- (617) 726-3906
- Enumerated
- May 15, 2023
- Record last updated
- Jun 30, 2026
- Fax
- (617) 726-7653
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 487 in Massachusetts → Look up another NPI →
Also registered at 55 Fruit St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Moustafa AbdallaStudent in an Organized Health Care Education/Training Program1952046062
- Shadi Abdar Esfahani, MD, MPHDiagnostic Radiology Physician1497137590
Verify Stephanos Vassilopoulos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 3019979Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average infectious disease physician in 2024
360 Medicare Part D claims for 81 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
Most prescribed
- Albuterol Sulfate Hfa23 claims
- Atorvastatin Calcium18 claims
- Amlodipine Besylate17 claims
- Omeprazole17 claims
- Lisinopril14 claims
- Tamsulosin Hcl13 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.
Stephanos Vassilopoulos among 487 infectious disease physician records in Massachusetts
Stephanos Vassilopoulos, MD is one of 487 infectious disease physician records with a practice address in Massachusetts. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 99% of them.
- NPI issued2023 · 99% of these records are older, 1% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2026 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Massachusetts
There are 487 infectious disease physician records in Massachusetts.
All 487 in Massachusetts → Every provider in Boston → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Diana Brainard, MDBoston, MA 021141093705667
- Joan Butterton, MDBoston, MA 021141043200157
- Benjamin Davis, MDBoston, MA 021141912997537
- Marlene Durand, MDBoston, MA 021141598756058
- Jay Fishman, MDBoston, MA 021141912988106
- Marcia Goldberg, MDBoston, MA 021141700877834
- Deborah Hung, MDBoston, MA 021141629068267
- Sabina Islam, MDBoston, MA 021141275514390
Common questions
What is Stephanos Vassilopoulos, MD's NPI number?
Stephanos Vassilopoulos, MD's National Provider Identifier (NPI) is 1801586631, issued on May 15, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Stephanos Vassilopoulos, MD located?
The NPPES record lists a practice address at 55 Fruit St, Boston, MA, 02114. Phone: (617) 726-3906. Providers update this record themselves, so call before visiting.
How can I verify Stephanos Vassilopoulos, MD's license?
NPPES lists Massachusetts license number 3019979, 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 Stephanos Vassilopoulos, MD prescribe under Medicare Part D?
In 2024, Stephanos Vassilopoulos, MD had 360 Medicare Part D claims for 81 beneficiaries; the average among infectious disease physician prescribers was 689. 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.