John Alexopoulos, M.D.
Internal Medicine Physician · Northport, NY
John Alexopoulos, M.D. is an internal medicine physician with a practice address in Northport, New York, and NPI 1306013446, issued on May 8, 2008. Check the license on the NYS Education Department, Office of the Professions; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Alexopoulos
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301099567 MI
Self-reported in NPPES; status is on the state search - Practice location
- 79 Middleville RD, Northport, NY 11768
- Phone
- (631) 261-4400
- Enumerated
- May 8, 2008
- Entity
- Type 1 · individual
Also registered at 79 Middleville RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mark Albert, NPPsychiatric/Mental Health Nurse Practitioner1477822096
- Cherian Alexander, M.D.Internal Medicine Physician1144252941
Verify John Alexopoulos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the ProfessionsCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
40 internal medicine physician records list a Northport practice address
They are 40 of the 879 NPPES records with a Northport practice address, and 13,725 internal medicine physician records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 40 in Northport → All 13,725 in New York → Every provider in Northport →
Other internal medicine physician records in New York
- Deborah Aanonsen, D.O.Staten Island, NY1952395717
- Nivedita Aanur, M.D.New York, NY1982833471
- Jay Aaron, MDGreat Neck, NY1245332956
- Justin Aaron, MDNew York, NY1619243912
- Ahmad AbadiPoughkeepsie, NY1780258517
- Jamsheed Abadi, MDBrooklyn, NY1477537496
- Theophine Abakporo, M.D.Brooklyn, NY1972564813
- Antonieta Abarientos, MDNew Rochelle, NY1649285123
- Charles Abate, MDOssining, NY1720180003
- Vyachislav Abayev, M.D.Brooklyn, NY1437394574
Common questions
What is John Alexopoulos, M.D.'s NPI number?
John Alexopoulos, M.D.'s National Provider Identifier (NPI) is 1306013446, issued on May 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Alexopoulos, M.D. located?
The NPPES record lists a practice address at 79 Middleville RD, Northport, NY, 11768. Phone: (631) 261-4400. Providers update this record themselves, so call before visiting.
How can I verify John Alexopoulos, M.D.'s license?
Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.