NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

On Chen, M.D

Interventional Cardiology Physician in Stony Brook, NY · enumerated 2010.

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

National Provider Identifier

1750681912

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name On Chen
Credential M.D
Sex Male
Practice address Hsc T16-080, Stony Brook, NY, 11794
Phone (631) 444-1060
Fax (631) 444-1054
Enumeration date Oct 21, 2010
Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 278688 (NY) Primary
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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for On Chen?
The National Provider Identifier (NPI) for On Chen is 1750681912, a Type 1 (individual) record in the CMS NPPES registry.
Where does On Chen practice?
The practice location on file with NPPES is in Stony Brook, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.