Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen Grayson, MD

Emergency Medicine Physician in Mount Kisco, NY · enumerated 2005.

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

National Provider Identifier

1063405496

Verified

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Registry record

Entity type Individual (Type 1)

Name Stephen Grayson

Credential MD

Sex Male

Practice address 400 E Main St, Northern Westchester Hospital Emergency Dept, Mount Kisco, NY, 10549

Phone (914) 666-1254

Fax (914) 666-1268

Enumeration date Aug 31, 2005

Last updated in NPPES Jan 22, 2014

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 133867 (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
4147732	Other	-	MVP HEALTHPLAN ID #
4702133	Other	-	GHI PPO PROVIDER ID
0511100000034	Other	-	FIDELISCARE PROVIDER ID#
2665341	Other	-	AETNA HMO PROVIDER ID#
10112151-D815	Other	-	CDPHP PROV & GRP PIN
P1974829	Other	-	OXFORD HEALTHPLAN ID #
000000093405	Other	-	GHI HMO PROVIDER ID#
2H7971	Other	-	EMPIRE BCBS PROVIDER PIN#
5C7511	Other	-	HEALTHNET PROVIDER ID#
77599226	Other	-	AETNA PPO PROVIDER ID#

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

How do I verify Stephen Grayson's NPI record?

Cross-check NPI 1063405496 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1063405496 active?

Yes, as of the latest NPPES snapshot, NPI 1063405496 is active (record last updated 2014-01-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-22.