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

Dr. Roy Pillsub Won, MD

Individual provider Colon & Rectal Surgery Physician · NPI 1225470354

Dr. Roy Pillsub Won, MD is a General Surgery in Fullerton, California. Graduated from University of Cincinnati College of Medicine in 2013, 13 years ago. Practices with Kaiser Foundation Health Plan of the Mid Atlantic States, Inc, a 1,934-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California and Texas.

Years since qualifying
13
Trained at
University of Cincinnati College of Medicine
Licensed in
CA, TX
In the registry since
2013
Specialties on file
2
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

1950 Sunny Crest Dr Ste 3500
Fullerton, CA 92835-3646
Phone: (714) 408-4249
Fax: (714) 525-0123
Show map & directions

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

Additional practice locations (2)

  • 15655 Cypress Wood Medical Dr Ste 100, Houston, TX 77014-1487 — (713) 442-1700
  • 106 Vision Park Blvd, Shenandoah, TX 77384-3000 — (713) 442-1800

Specialties & licences

Colon & Rectal Surgery Physician (primary) Taxonomy 208C00000X · Licence A134883 (CA)
Colon & Rectal Surgery Physician Taxonomy 208C00000X · Licence S6980 (TX)

Record details

NPI number1225470354
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 17, 2013
Last updated in NPPESAugust 25, 2025
Certification dateAugust 25, 2025

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc — 1934 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare