Alan K. Felsen, M.D.
Internal Medicine Physician · Hackensack, NJ
Alan K. Felsen, M.D. is an internal medicine physician with a practice address in Hackensack, New Jersey, and NPI 1619979317, issued on Aug 11, 2005. Check the license (New Jersey 25MA03327000, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Alan K. Felsen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 25MA03327000 NJ
MA033270000 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 15 Anderson Street, Hackensack, NJ 07601
- Phone
- (201) 487-3355
- Enumerated
- Aug 11, 2005
- Record last updated
- Jan 26, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (201) 487-0960
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,632 in New Jersey → Look up another NPI →
Verify Alan K. Felsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA03327000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
152 Medicare Part D claims for 19 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 97% of claims.
Most prescribed
- Linzess33 claims
- Eliquis31 claims
- Entresto31 claims
- Jardiance28 claims
- Rexulti15 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.
Alan K. Felsen among 4,632 internal medicine physician records in New Jersey
Alan K. Felsen, M.D. is one of 4,632 internal medicine physician records with a practice address in New Jersey. 82% 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 · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2012 · 63% 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 Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
100 internal medicine physician records list a practice address in Hackensack
They are 100 of the 2,908 NPPES records with a practice address in Hackensack, and 4,632 internal medicine physician records in New Jersey.
All 4,632 in New Jersey → Every provider in Hackensack → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Carlos Cesar, MDHackensack, NJ 076011245286178
- Martin Chatelain, MDHackensack, NJ 076011538116611
- Michael Farber, MDHackensck, NJ 076011538107867
- Morris Friedman, DOHackensack, NJ 076011013968783
- Adam Goldfarb, MDHackensack, NJ 076011275534174
- Galina Grigoryan, MDHackensack, NJ 076011619923067
- Vinita Manoraj, MDHackensack, NJ 076011295781664
- Edward Prins, MDHackensack, NJ 076011619978905
Common questions
What is Alan K. Felsen, M.D.'s NPI number?
Alan K. Felsen, M.D.'s National Provider Identifier (NPI) is 1619979317, issued on Aug 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Alan K. Felsen, M.D. located?
The NPPES record lists a practice address at 15 Anderson Street, Hackensack, NJ, 07601. Phone: (201) 487-3355. Providers update this record themselves, so call before visiting.
How can I verify Alan K. Felsen, M.D.'s license?
NPPES lists New Jersey license number 25MA03327000, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alan K. Felsen, M.D. prescribe under Medicare Part D?
In 2024, Alan K. Felsen, M.D. had 152 Medicare Part D claims for 19 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.