Harish Kumar Rengarajan, MD
Internal Medicine Physician · Port Jefferson, NY
Harish Kumar Rengarajan, MD is an internal medicine physician with a practice address in Port Jefferson, New York, and NPI 1740592757, issued on Jul 7, 2010. Check the license (New York 296877-1, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Harish Kumar Rengarajan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 296877-1 NY
256924 MA
Self-reported in NPPES; status is on the state search - Practice location
- 75 N Country RD, Port Jefferson, NY 11777
- Phone
- (631) 473-1320
- Enumerated
- Jul 7, 2010
- Record last updated
- Feb 1, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20231019001986); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 75 N Country RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yasser Abdelbaki, M.D.Internal Medicine Physician1790149771
- Omar Ahmad, MDInternal Medicine Physician1043531254
- Mohamed AhmedPsychiatry Physician1912534652
- Fareeha Ajmal, DOHospitalist Physician1285375675
- Sarmad Al Obaidi, MDStudent in an Organized Health Care Education/Training Program1780387662
- Shabab Ali, MDStudent in an Organized Health Care Education/Training Program1497694962
Verify Harish Kumar Rengarajan 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 296877-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Sutter Bay Medical FoundationFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Harish Kumar Rengarajan among 12,067 internal medicine physician records in New York
Harish Kumar Rengarajan, MD 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2005 · median 2002 among the 7,221 with a school on file
- Record last updated2019 · 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).
43 internal medicine physician records list a practice address in Port Jefferson
They are 43 of the 983 NPPES records with a practice address in Port Jefferson, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Port Jefferson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Norman Bennett, M.D.Port Jefferson, NY 117771700857786
- Lucien Cardinal, MDPort Jefferson, NY 117771306935150
- Mark Dibenedetto, M.D.Port Jefferson, NY 117771619940269
- Joan Faro, M.D.Port Jefferson, NY 117771083756738
- Kenneth Fishberger, MDPort Jefferson, NY 117771649291451
- Alexander Gorbatsevich, M.D.Port Jefferson, NY 117771538161005
- Mark Kropf, M.D.Port Jefferson, NY 117771104820018
- Myat Myo, M.DPort Jefferson, NY 117771295995082
Common questions
What is Harish Kumar Rengarajan, MD's NPI number?
Harish Kumar Rengarajan, MD's National Provider Identifier (NPI) is 1740592757, issued on Jul 7, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Harish Kumar Rengarajan, MD located?
The NPPES record lists a practice address at 75 N Country RD, Port Jefferson, NY, 11777. Phone: (631) 473-1320. Providers update this record themselves, so call before visiting.
How can I verify Harish Kumar Rengarajan, MD's license?
NPPES lists New York license number 296877-1, 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.
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.