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

Dr. Gilbert K Ong, MD

Individual provider Gastroenterology Physician · NPI 1740310283

Dr. Gilbert K Ong, MD is a Gastroenterology in Zillah, Washington. Qualified in 1997, 29 years ago. Practices with Sunnyside Community Hospital Association, a 57-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
29
Licensed in
WA
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

915 Vintage Valley Pkwy
Zillah, WA 98953-9800
Phone: (509) 314-6565
Show map & directions

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

Additional practice locations (1)

  • 3909 Creekside Loop, Yakima, WA 98902-4880 — (509) 248-6616

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD00047300 (WA)

Record details

NPI number1740310283
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 6, 2007
Last updated in NPPESMarch 7, 2025
Certification dateMarch 7, 2025
Mailing addressPo Box 719, Sunnyside, WA 98944-0719

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice Sunnyside Community Hospital Association — 57 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare