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

William Loi Ngo, DO

Individual provider Geriatric Medicine (Family Medicine) Physician · NPI 1932161189

William Loi Ngo, DO is a General Practice in Garden Grove, California. Graduated from College of Osteo Med of the Pacific at Pomona in 1990, 36 years ago. Accepts Medicare assignment. Licensed in California.

Years since qualifying
36
Trained at
College of Osteo Med of the Pacific at Pomona
Licensed in
CA
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

8342 Garden Grove Blvd Ste 5
Garden Grove, CA 92844-1192
Phone: (714) 590-4899
Fax: (714) 590-1833
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Family Medicine) Physician (primary) Taxonomy 207QG0300X · Licence 20A6015 (CA)

Record details

NPI number1932161189
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 4, 2006
Last updated in NPPESMay 16, 2008

Medicare enrollment

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

Medicare specialtyGENERAL PRACTICE
Also practisesFAMILY PRACTICE
Medical schoolCOLLEGE OF OSTEO MED OF THE PACIFIC AT POMONA
Graduated 1990 (36 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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