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

Dr. Don S Oh, MD

Individual provider Internal Medicine Physician · NPI 1326247669

Dr. Don S Oh, MD is an Internal Medicine Physician in Tustin, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2488 Aquasanta
Tustin, CA 92782-1103
Phone: (714) 222-3258
Fax: (713) 544-3261
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A038686 (CA)

Record details

NPI number1326247669
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 17, 2007
Last updated in NPPESJuly 17, 2007
Mailing address2488 Aquasanta, Tustin, CA 92782-1103

Other providers in Tustin