Cassandra Laing Chow, OD
Optometrist · San Francisco, CA
Cassandra Laing Chow, OD is an optometrist with a practice address in San Francisco, California, and NPI 1184398190, issued on Aug 3, 2021. Check the license (California 34873, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassandra Laing Chow
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 34873 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3251 20TH Ave Ste 219, San Francisco, CA 94132
- Phone
- (415) 566-9292
- Enumerated
- Aug 3, 2021
- Record last updated
- Feb 15, 2022
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 3251 20TH Ave Ste 219
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beverly Mark, O.D.Optometrist1578614418
- Teresa WongOptometrist1780232868
Verify Cassandra Laing Chow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 34873Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $13.14
1 payment: food and beverage; the largest payer was CooperVision Inc. The 34,453 providers of this specialty with any payment received $769.99 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.
Cassandra Laing Chow among 8,308 optometrist records in California
Cassandra Laing Chow, OD is one of 8,308 optometrist records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 86% of them.
- NPI issued2021 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2022 · 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 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in California
There are 8,308 optometrist records in California.
All 8,308 in California → Every provider in San Francisco → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Bandar BawazirSan Francisco, CA 941321770400301
- Christina Chang, O.D.San Francisco, CA 941321326412529
- Jenny Huynh, ODSan Francisco, CA 941321437084563
- Beverly Mark, O.D.San Francisco, CA 941321578614418
- Robert Monetta, ODSan Francisco, CA 941321669523163
- Chester Quan, O.D.San Francisco, CA 941321336162171
- Krystle Quan, O.D.San Francisco, CA 941321063846921
- Sui Situ, O.D.San Francisco, CA 941321770872699
Common questions
What is Cassandra Laing Chow, OD's NPI number?
Cassandra Laing Chow, OD's National Provider Identifier (NPI) is 1184398190, issued on Aug 3, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Laing Chow, OD located?
The NPPES record lists a practice address at 3251 20TH Ave Ste 219, San Francisco, CA, 94132. Phone: (415) 566-9292. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Laing Chow, OD's license?
NPPES lists California license number 34873, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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.