Gilbert K. Ong, MD
Gastroenterology Physician · Zillah, WA
Gilbert K. Ong, MD is a gastroenterology physician with a practice address in Zillah, Washington, and NPI 1740310283, issued on Mar 6, 2007. Check the license (Washington MD00047300, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Gilbert K. Ong
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD00047300 WA
Self-reported in NPPES; status is on the state search - Practice location
- 915 Vintage Valley Pkwy, Zillah, WA 98953
- Phone
- (509) 314-6565
- Enumerated
- Mar 6, 2007
- Record last updated
- Mar 7, 2025
- Medicare enrollment
- Enrolled (PECOS I20070814000681); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 533 in Washington → Look up another NPI →
Also registered at 915 Vintage Valley Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Peter GrunertNeurological Surgery Physician1285185454
Verify Gilbert K. Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00047300Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% more Medicare Part D claims than the average gastroenterology physician in 2024
929 Medicare Part D claims for 346 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Omeprazole283 claims
- Pantoprazole Sodium130 claims
- Suflave42 claims
- Sod Sulf-Potass Sulf-Mag Sulf38 claims
- Loperamide31 claims
- Mesalamine27 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 80 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $295.31
12 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Shc Medical Center ToppenishZillah, WA
- Sunnyside Community Hospital AssociationZillah, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gilbert K. Ong among 533 gastroenterology physician records in Washington
Gilbert K. Ong, MD is one of 533 gastroenterology physician records with a practice address in Washington. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 36% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1997 · median 2003 among the 373 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 gastroenterology physician record lists a practice address in Zillah
They are 1 of the 38 NPPES records with a practice address in Zillah, and 533 gastroenterology physician records in Washington.
All 533 in Washington → Every provider in Zillah → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Nathan Alhalel, MD, MPHYakima, WA 989081982097408
- Thomas Pulliam, M.D.Yakima, WA 989081205898103
- Vu Le, MDUnion Gap, WA 989031912047051
- Timothy Brown, MDYakima, WA 989021780608679
- Tejas Kirtane, M.D.Yakima, WA 989021104118553
- Pornchai Leelasinjaroen, M.D.Yakima, WA 989021336403062
- Kevin Olden, MDYakima, WA 989021386682185
- Gonzalo Pandolfi, MDYakima, WA 989021821010760
Common questions
What is Gilbert K. Ong, MD's NPI number?
Gilbert K. Ong, MD's National Provider Identifier (NPI) is 1740310283, issued on Mar 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gilbert K. Ong, MD located?
The NPPES record lists a practice address at 915 Vintage Valley Pkwy, Zillah, WA, 98953. Phone: (509) 314-6565. Providers update this record themselves, so call before visiting.
How can I verify Gilbert K. Ong, MD's license?
NPPES lists Washington license number MD00047300, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gilbert K. Ong, MD prescribe under Medicare Part D?
In 2024, Gilbert K. Ong, MD had 929 Medicare Part D claims for 346 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Gilbert K. Ong, MD's MIPS final score?
The 2023 MIPS final score is 80 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.