Kenneth Irwin Fishberger, MD
Internal Medicine Physician · Port Jefferson, NY
Kenneth Irwin Fishberger, MD is an internal medicine physician with a practice address in Port Jefferson, New York, and NPI 1649291451, issued on Jul 21, 2006. Check the license (New York 129974, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Kenneth Irwin Fishberger
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 129974 NY
Self-reported in NPPES; status is on the state search - Practice location
- 200 Belle Terre Road, Port Jefferson, NY 11777
- Phone
- (631) 642-9801
- Enumerated
- Jul 21, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (631) 642-9805
- Medicaid ID
- 00296713 NY
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 200 Belle Terre Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kenneth Irwin Fishberger 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 129974Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average internal medicine physician in 2024
3,167 Medicare Part D claims for 362 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 35 claims were for opioids.
Most prescribed
- Amlodipine Besylate192 claims
- Levothyroxine Sodium158 claims
- Rosuvastatin Calcium108 claims
- Pantoprazole Sodium103 claims
- Ezetimibe87 claims
- Metoprolol Succinate84 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: $395.13
19 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Kenneth Irwin Fishberger among 12,067 internal medicine physician records in New York
Kenneth Irwin Fishberger, 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 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 fileNo · 60% of these records are
- Record last updated2007 · 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
- Alexander Gorbatsevich, M.D.Port Jefferson, NY 117771538161005
- Mark Kropf, M.D.Port Jefferson, NY 117771104820018
- Myat Myo, M.DPort Jefferson, NY 117771295995082
- Rosario Romano, MDPort Jefferson, NY 117771356442107
Common questions
What is Kenneth Irwin Fishberger, MD's NPI number?
Kenneth Irwin Fishberger, MD's National Provider Identifier (NPI) is 1649291451, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth Irwin Fishberger, MD located?
The NPPES record lists a practice address at 200 Belle Terre Road, Port Jefferson, NY, 11777. Phone: (631) 642-9801. Providers update this record themselves, so call before visiting.
How can I verify Kenneth Irwin Fishberger, MD's license?
NPPES lists New York license number 129974, 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 Kenneth Irwin Fishberger, MD prescribe under Medicare Part D?
In 2024, Kenneth Irwin Fishberger, MD had 3,167 Medicare Part D claims for 362 beneficiaries; 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.