Michael W. Mendelson, M.D.
Internal Medicine Physician · Port Jefferson Station, NY
Michael W. Mendelson, M.D. is an internal medicine physician with a practice address in Port Jefferson Station, New York, and NPI 1043323835, issued on Aug 16, 2006. Check the license (New York 110115, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Michael W. Mendelson
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 110115 NY
Self-reported in NPPES; status is on the state search - Practice location
- 5360 Nesconset Hghy, Port Jefferson Station, NY 11776
- Phone
- (631) 331-3200
- Enumerated
- Aug 16, 2006
- Record last updated
- May 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (631) 331-3694
- Medicare enrollment
- Enrolled (PECOS I20100916000622); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1965
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Verify Michael W. Mendelson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 110115Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
31 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Bills Medicare through one group practice
- Cardiac Ekg Interpretation, P. C.West Islip, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael W. Mendelson among 12,067 internal medicine physician records in New York
Michael W. Mendelson, M.D. is one of 12,067 internal medicine physician records with a practice address in New York. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1965 · median 2002 among the 7,221 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 internal medicine physician records list a practice address in Port Jefferson Station
They are 16 of the 951 NPPES records with a practice address in Port Jefferson Station, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Port Jefferson Station → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Denise Abselet, DOPort Jefferson Station, NY 117761780770131
- Matias Dcosta, MDPort Jefferson Station, NY 117761053374827
- Christine Fruth Giacobbe, D.O.Port Jefferson Station, NY 117761417920208
- Robert Giacobbe, D.O.Port Jefferson Station, NY 117761154394930
- Deepti Gupta, M.D.Port Jefferson Station, NY 117761619936069
- Siva Kolupoti, M.DPort Jefferson Station, NY 117761609809102
- Robert Mormando, D.O.Port Jefferson Station, NY 117761306816129
- John Ricciardelli, M.D.Port Jefferson Station, NY 117761497729099
Common questions
What is Michael W. Mendelson, M.D.'s NPI number?
Michael W. Mendelson, M.D.'s National Provider Identifier (NPI) is 1043323835, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael W. Mendelson, M.D. located?
The NPPES record lists a practice address at 5360 Nesconset Hghy, Port Jefferson Station, NY, 11776. Phone: (631) 331-3200. Providers update this record themselves, so call before visiting.
How can I verify Michael W. Mendelson, M.D.'s license?
NPPES lists New York license number 110115, as entered by the provider. 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.
How much does Michael W. Mendelson, M.D. prescribe under Medicare Part D?
In 2024, Michael W. Mendelson, M.D. had 31 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.