Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Derek J Chong, M.D.

Neurology Physician in New York, NY · enumerated 2006.

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

National Provider Identifier

1669412011

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Registry record

Entity type Individual (Type 1)

Name Dr. Derek J Chong

Credential M.D.

Sex Male

Practice address 130 E 77th St, 8th Floor, New York, NY, 10075

Phone (212) 434-3640

Enumeration date Jun 7, 2006

Last updated in NPPES Feb 13, 2016

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 267017 (NY) Primary

2084S0012X Sleep Medicine (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License 267017 (NY) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Derek Chong?

Derek Chong is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-13.