Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Hai Dong Nguyen, MD

Individual provider Internal Medicine Physician · NPI 1558516963

Dr. Hai Dong Nguyen, MD is an Internal Medicine in Santa Ana, California. Qualified in 1997, 29 years ago. Practices with Grace Hospitalist Group Inc, a 9-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
29
Licensed in
CA
In the registry since
2008
Specialties on file
3
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

2907 Sawgrass Dr
Santa Ana, CA 92706-1195
Phone: (714) 675-3937
Fax: (877) 820-4151
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A114137 (CA)
Hospitalist Physician Taxonomy 208M00000X · Licence A114137 (CA)
General Practice Physician Taxonomy 208D00000X · Licence A114137 (CA)

Record details

NPI number1558516963
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 26, 2008
Last updated in NPPESDecember 19, 2013

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice Grace Hospitalist Group Inc — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Santa Ana