Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Douglas Long Nguyen, MD

Individual provider Internal Medicine Physician · NPI 1184880114

Douglas Long Nguyen, MD is a Gastroenterology in Mission Viejo, California. Graduated from Cincinnati College of Medicine and Surgery in 2008, 18 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
18
Trained at
Cincinnati College of Medicine and Surgery
Licensed in
CA
In the registry since
2008
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

27799 Medical Center Rd Ste 310
Mission Viejo, CA 92691-6400
Phone: (949) 364-5090
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 11234 Anderson St # Mc-1516, Loma Linda, CA 92354-2804 — (909) 558-4905

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A113814 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A113814 (CA)

Record details

NPI number1184880114
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 30, 2008
Last updated in NPPESMay 12, 2022
Certification dateMay 12, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolCINCINNATI COLLEGE OF MEDICINE AND SURGERY
Graduated 2008 (18 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Mission Viejo