Alex Onishi
Ophthalmology Physician · Daly City, CA
Alex Onishi is an ophthalmology physician with a practice address in Daly City, California, and NPI 1710351622, issued on Nov 17, 2015. Check the license (California A181374, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alex Onishi
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A181374 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1850 Sullivan Ave Ste 540, Daly City, CA 94015
- Phone
- (650) 755-6900
- Enumerated
- Nov 17, 2015
- Record last updated
- Jul 28, 2023
- Medicare enrollment
- Enrolled (PECOS I20240212003323); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2019
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 1850 Sullivan Ave Ste 540
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anh Bui, MDOphthalmology Physician1558820811
Verify Alex Onishi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A181374Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average ophthalmology physician in 2024
542 Medicare Part D claims for 226 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Latanoprost116 claims
- Neomycin-Polymyxin-Dexameth64 claims
- Erythromycin55 claims
- Prednisolone Acetate47 claims
- Dorzolamide-Timolol42 claims
- Moxifloxacin33 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: $566.06
17 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. 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.
Bills Medicare through one group practice
- E Joseph Nadji MD A Medical CorporationSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alex Onishi among 2,899 ophthalmology physician records in California
Alex Onishi 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 2015, is newer than 84% of them.
- NPI issued2015 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2019 · median 2001 among the 1,907 with a school on file
- Record last updated2023 · 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).
24 ophthalmology physician records list a practice address in Daly City
They are 24 of the 1,606 NPPES records with a practice address in Daly City, and 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Daly City → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Eleanor Becker, MDDaly City, CA 940151720166317
- Daniel Buckley, M.D.Daly City, CA 940151013916733
- Jennifer Diehn, MDDaly City, CA 940151295813798
- Michael Hee, MD PHDDaly City, CA 940151801891551
- Angela Kraft, MDDaly City, CA 940151770661316
- Bernd Kutzscher, M.D.Daly City, CA 940151891791133
- Susan Longar, M.D.Daly City, CA 940151578506960
- Barry McNamara, M.D.Daly City, CA 940151922006071
Common questions
What is Alex Onishi's NPI number?
Alex Onishi's National Provider Identifier (NPI) is 1710351622, issued on Nov 17, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Alex Onishi located?
The NPPES record lists a practice address at 1850 Sullivan Ave Ste 540, Daly City, CA, 94015. Phone: (650) 755-6900. Providers update this record themselves, so call before visiting.
How can I verify Alex Onishi's license?
NPPES lists California license number A181374, 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 Alex Onishi prescribe under Medicare Part D?
In 2024, Alex Onishi had 542 Medicare Part D claims for 226 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.