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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas K O'Brien, MD

Pediatrics Physician in Ocean, NJ · enumerated 2006.

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

National Provider Identifier

1659342889

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Registry record

Entity type Individual (Type 1)
Name Dr. Thomas K O'Brien
Credential MD
Sex Male
Practice address 804 W Park Ave, Ocean, NJ, 07712
Phone (732) 531-0010
Fax (732) 493-0903
Enumeration date Jan 27, 2006
Last updated in NPPES Dec 7, 2018

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 25MA06852300 (NJ) 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
8487502 Medicaid NJ -

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 NPI 1659342889 active?
Yes, as of the latest NPPES snapshot, NPI 1659342889 is active (record last updated 2018-12-07).
How do I verify Thomas O'Brien's NPI record?
Cross-check NPI 1659342889 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-12-07.