Bernard Jay Nash, M.D.
Internal Medicine Physician · West Islip, NY
Bernard Jay Nash, M.D. is an internal medicine physician with a practice address in West Islip, New York, and NPI 1831196187, issued on Jul 1, 2005. Check the license (New York 145915, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Bernard Jay Nash
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 145915 NY
Self-reported in NPPES; status is on the state search - Practice location
- 500 Montauk Hwy, West Islip, NY 11795
- Phone
- (631) 587-7733
- Enumerated
- Jul 1, 2005
- Record last updated
- Mar 15, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (631) 587-7798
- Medicaid ID
- 00821590 NY
- Medicare enrollment
- Enrolled (PECOS I20091218000093); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1975
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 500 Montauk Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren Cardenas, PAPhysician Assistant1417200460
- Debra Civitano, FNPFamily Nurse Practitioner1295419240
- Danielle Didonna, PA-CPhysician Assistant1487799102
- Wanda Dussmann, LCSWClinical Social Worker1629142831
- Mary Anne Geskie, PH.D.Clinical Psychologist1861485583
- Stephen Harris, MDPlastic Surgery Physician1962402677
Verify Bernard Jay Nash 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 145915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,435 Medicare Part D claims for 263 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium359 claims
- Biktarvy119 claims
- Metoprolol Succinate119 claims
- Losartan Potassium109 claims
- Amlodipine Besylate103 claims
- Metformin Hcl81 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.
The MIPS final score for 2023 (Medicare payment program): 91.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $21.71
1 payment: food and beverage; the largest payer was Boston Scientific Corporation. 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.
Bills Medicare through one group practice
- North Shore-Lij Medical PCSmithtown, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bernard Jay Nash among 12,067 internal medicine physician records in New York
Bernard Jay Nash, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1975 · median 2002 among the 7,221 with a school on file
- Record last updated2013 · 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).
23 internal medicine physician records list a practice address in West Islip
They are 23 of the 1,107 NPPES records with a practice address in West Islip, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in West Islip → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sumeet Anand, MDWest Islip, NY 117951902896764
- Eleni Dilos, M.D.West Islip, NY 117951992700116
- Michael Gewirtz, MDWest Islip, NY 117951093739534
- Stuart Greenberg, M.D.West Islip, NY 117951043244130
- Thomas Hall, MDWest Islip, NY 117951356365803
- Abu Muhammad Haque, MDWest Islip, NY 117951588658512
- Gabriel Leonte, MDWest Islip, NY 117951144225350
- Anser Lone, M.D.West Islip, NY 117951407851637
Common questions
What is Bernard Jay Nash, M.D.'s NPI number?
Bernard Jay Nash, M.D.'s National Provider Identifier (NPI) is 1831196187, issued on Jul 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Bernard Jay Nash, M.D. located?
The NPPES record lists a practice address at 500 Montauk Hwy, West Islip, NY, 11795. Phone: (631) 587-7733. Providers update this record themselves, so call before visiting.
How can I verify Bernard Jay Nash, M.D.'s license?
NPPES lists New York license number 145915, 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 Bernard Jay Nash, M.D. prescribe under Medicare Part D?
In 2024, Bernard Jay Nash, M.D. had 2,435 Medicare Part D claims for 263 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Bernard Jay Nash, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.