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Eugene J Louieng, MD, PC

Obstetrics & Gynecology Physician in Manassas, VA · enumerated 2006 · authorized official Eugene Louie-Ng, President.

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

National Provider Identifier

1780785451

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Registry record

Entity type Organization (Type 2)
Legal business name Eugene J Louieng, MD, PC
Practice address 8650 Sudley Road, Suite 303, Manassas, VA, 20110
Phone (703) 361-3551
Fax (703) 365-7702
Enumeration date Sep 26, 2006
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 0101240017 (VA) Primary

Authorized official

Name Eugene Louie-Ng
Title President
Phone (703) 361-3551

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

What type of organization is Eugene J Louieng, MD, PC?
Eugene J Louieng, MD, PC is registered in NPPES as a Obstetrics & Gynecology Physician (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.