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

Dr. Patrick Koo, MD

Individual provider Gastroenterology Physician · NPI 1801152772

Dr. Patrick Koo, MD is an Internal Medicine in Fullerton, California. Graduated from Pennsylvania State University College of Medicine in 2012, 14 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
14
Trained at
Pennsylvania State University College of Medicine
Licensed in
CA
In the registry since
2012
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

1837 Sunny Crest Dr
Fullerton, CA 92835-3616
Phone: (714) 446-5831
Fax: (714) 446-7910
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A136521 (CA)

Record details

NPI number1801152772
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 5, 2012
Last updated in NPPESOctober 22, 2024
Certification dateOctober 22, 2024
Mailing address1837 Sunny Crest Dr, Fullerton, CA 92835-3616

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGASTROENTEROLOGY
Medical schoolPENNSYLVANIA STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated 2012 (14 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

Other providers in Fullerton