Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Siddhartha Shyam Nadkarni, M.D.

Epilepsy Physician in New York, NY · enumerated 2006.

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

National Provider Identifier

1861400814

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Registry record

Entity type Individual (Type 1)

Name Siddhartha Shyam Nadkarni

Credential M.D.

Sex Male

Practice address 223 E 34th St, New York, NY, 10016

Phone (646) 558-0807

Enumeration date Aug 4, 2006

Last updated in NPPES Jan 4, 2026

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 25MA11349100 (NJ) Secondary

2084E0001X Epilepsy Physician Allopathic & Osteopathic Physicians · License 25MA11349100 (NJ) Primary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 219164 (NY) Secondary

2084N0600X Clinical Neurophysiology Physician Allopathic & Osteopathic Physicians · License 219164 (NY) Secondary

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
2677916	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.

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Frequently asked questions

How do I verify Siddhartha Nadkarni's NPI record?

Cross-check NPI 1861400814 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1861400814 active?

Yes, as of the latest NPPES snapshot, NPI 1861400814 is active (record last updated 2026-01-04).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-04.