William Weng Ping Ko, M.D.
Ophthalmology Physician · San Gabriel, CA
William Weng Ping Ko, M.D. is an ophthalmology physician with a practice address in San Gabriel, California, and NPI 1548268873, issued on Jul 11, 2005. Check the license (California G73648, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Weng Ping Ko
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G73648 CA
Self-reported in NPPES; status is on the state search - Practice location
- 117 S Mission Dr, San Gabriel, CA 91776
- Phone
- (626) 284-2168
- Enumerated
- Jul 11, 2005
- Record last updated
- Feb 22, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (626) 284-7980
- Medicaid ID
- 00G736480 CA
- Medicare enrollment
- Enrolled (PECOS I20091113000149); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Verify William Weng Ping Ko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73648Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.9 times the Medicare Part D claims of the average ophthalmology physician in 2024
5,863 Medicare Part D claims for 1,032 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Latanoprost1,732 claims
- Azelastine Hcl817 claims
- Timolol Maleate419 claims
- Lumigan353 claims
- Dorzolamide-Timolol347 claims
- Restasis334 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.
Industry payments in 2024: $16.60
1 payment: food and beverage; the largest payer was Sun Pharmaceutical Industries Inc. The 13,221 providers of this specialty with any payment received $4,535.02 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.
William Weng Ping Ko among 2,899 ophthalmology physician records in California
William Weng Ping Ko, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1988 · median 2001 among the 1,907 with a school on file
- Record last updated2008 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 ophthalmology physician records list a practice address in San Gabriel
They are 8 of the 762 NPPES records with a practice address in San Gabriel, and 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in San Gabriel → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Brian Chen, M.D.San Gabriel, CA 917761952631632
- Ying Huang, M.D.San Gabriel, CA 917761487713061
- Richard Kratz, MD MPHSan Gabriel, CA 917761811988496
- Joni Lu, DOSan Gabriel, CA 917761104110592
- Frank Schiff, MDSan Gabriel, CA 917761205827193
- George Zhang, MDSan Gabriel, CA 917761922561554
- Diana Chao, MDSan Gabriel, CA 917751528320298
- Roger Chan, M.D.Rosemead, CA 917701104965375
Common questions
What is William Weng Ping Ko, M.D.'s NPI number?
William Weng Ping Ko, M.D.'s National Provider Identifier (NPI) is 1548268873, issued on Jul 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Weng Ping Ko, M.D. located?
The NPPES record lists a practice address at 117 S Mission Dr, San Gabriel, CA, 91776. Phone: (626) 284-2168. Providers update this record themselves, so call before visiting.
How can I verify William Weng Ping Ko, M.D.'s license?
NPPES lists California license number G73648, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Weng Ping Ko, M.D. prescribe under Medicare Part D?
In 2024, William Weng Ping Ko, M.D. had 5,863 Medicare Part D claims for 1,032 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
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.