Jack Geffken, D.O.
Internal Medicine Physician · Bethpage, NY
Jack Geffken, D.O. is an internal medicine physician with a practice address in Bethpage, New York, and NPI 1053310268, issued on Jul 19, 2005. Check the license (New York 1894000, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Jack Geffken
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 1894000 NY
Self-reported in NPPES; status is on the state search - Practice location
- 530 Hicksville RD, Bethpage, NY 11714
- Phone
- (516) 937-5000
- Enumerated
- Jul 19, 2005
- Record last updated
- Feb 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (516) 931-2535
- Medicare enrollment
- Enrolled (PECOS I20040616000109); accepts Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 1991
- 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 530 Hicksville RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jack Geffken 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 1894000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
8,062 Medicare Part D claims for 616 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. 162 claims were for opioids.
Most prescribed
- Atorvastatin Calcium381 claims
- Amlodipine Besylate358 claims
- Rosuvastatin Calcium330 claims
- Levothyroxine Sodium274 claims
- Alprazolam231 claims
- Pantoprazole Sodium209 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 practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $62.44
3 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. 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
- New York UniversityNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jack Geffken among 12,067 internal medicine physician records in New York
Jack Geffken, D.O. 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
- Graduated1991 · 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).
19 internal medicine physician records list a practice address in Bethpage
They are 19 of the 653 NPPES records with a practice address in Bethpage, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Bethpage → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ballambattu Bhat, MDBethpage, NY 117141366485930
- Peter Buffa, M.D.Bethpage, NY 117141790884344
- Christine Jankowski, M.D.Bethpage, NY 117141508851668
- Beresford Jones, DOBethpage, NY 117141407857204
- Vanita Kaul, MDBethpage, NY 117141144258476
- Abdus Khan, MDBethpage, NY 117141679517619
- Diane Linzer, D.O.Bethpage, NY 117141780679845
- Seema Massand, MDBethpage, NY 117141952358095
Common questions
What is Jack Geffken, D.O.'s NPI number?
Jack Geffken, D.O.'s National Provider Identifier (NPI) is 1053310268, issued on Jul 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jack Geffken, D.O. located?
The NPPES record lists a practice address at 530 Hicksville RD, Bethpage, NY, 11714. Phone: (516) 937-5000. Providers update this record themselves, so call before visiting.
How can I verify Jack Geffken, D.O.'s license?
NPPES lists New York license number 1894000, 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 Jack Geffken, D.O. prescribe under Medicare Part D?
In 2024, Jack Geffken, D.O. had 8,062 Medicare Part D claims for 616 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Jack Geffken, D.O.'s MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. 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.