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Douglas Long Nguyen, MD

Gastroenterology Physician in Mission Viejo, CA · enumerated 2008.

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

National Provider Identifier

1184880114

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Registry record

Entity type Individual (Type 1)
Name Douglas Long Nguyen
Credential MD
Sex Male
Practice address 27799 Medical Center Rd Ste 310, Mission Viejo, CA, 92691
Phone (949) 364-5090
Enumeration date Jul 30, 2008
Last updated in NPPES May 12, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A113814 (CA) Secondary
207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License A113814 (CA) 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
ENROLLED Medicaid MN -

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 is the NPI number for Douglas Nguyen?
The National Provider Identifier (NPI) for Douglas Nguyen is 1184880114, a Type 1 (individual) record in the CMS NPPES registry.
Where does Douglas Nguyen practice?
The practice location on file with NPPES is in Mission Viejo, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-12.