Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Sidney Felsenstein, DPM
Podiatrist in Garden City, NY · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659327963
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Registry record
Entity type Individual (Type 1)
Name Dr. Sidney Felsenstein
Credential DPM
Sex Male
Practice address 1000 Zeckendorf Blvd, Garden City, NY, 11530
Phone (516) 542-6880
Fax (516) 542-5556
Enumeration date May 26, 2006
Last updated in NPPES Jul 2, 2013
Taxonomy & licenses
DPM · Doctor of Podiatric Medicine: A physician specializing in medical and surgical care of the foot and ankle.
About the DPM credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 00413507 | Medicaid | NY | - |
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.
Frequently asked questions
Where does Sidney Felsenstein practice?
The practice location on file with NPPES is in Garden City, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Sidney Felsenstein?
The National Provider Identifier (NPI) for Sidney Felsenstein is 1659327963, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-02.