NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Jerome Marvin Felsenstein, M.D.

Dermatology Physician in Ossining, NY · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1124137492

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Registry record

Entity type Individual (Type 1)
Name Dr. Jerome Marvin Felsenstein
Credential M.D.
Sex Male
Practice address Ossining, NY, 10562
Phone (914) 941-5770
Fax (914) 941-3141
Enumeration date Aug 30, 2006
Last updated in NPPES Jun 24, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 112406 (NY) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
321691 Other - MEDICARE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Jerome Felsenstein?
The National Provider Identifier (NPI) for Jerome Felsenstein is 1124137492, a Type 1 (individual) record in the CMS NPPES registry.
Where does Jerome Felsenstein practice?
The practice location on file with NPPES is in Ossining, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-24.