Sandi T. Woo, PA-C
Medical Physician Assistant · Castro Valley, CA
Sandi T. Woo, PA-C is a medical physician assistant with a practice address in Castro Valley, California, and NPI 1225103161, issued on Nov 22, 2006. Check the license (California PA18589, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sandi T. Woo
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA18589 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20126 Stanton Ave #100, Castro Valley, CA 94546
- Phone
- (510) 537-3556
- Enumerated
- Nov 22, 2006
- Record last updated
- Jul 1, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (510) 537-3610
- Medicare enrollment
- Enrolled (PECOS I20120911000158); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Verify Sandi T. Woo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA18589Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average medical physician assistant in 2024
2,428 Medicare Part D claims for 835 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Eliquis246 claims
- Metoprolol Succinate243 claims
- Atorvastatin Calcium185 claims
- Carvedilol142 claims
- Rosuvastatin Calcium92 claims
- Entresto89 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: $678.77
9 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. The 16,165 providers of this specialty with any payment received $1,055.00 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
- Sutter Bay Medical FoundationCastro Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sandi T. Woo among 3,376 medical physician assistant records in California
Sandi T. Woo, PA-C is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 80% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2006 · median 2012 among the 1,347 with a school on file
- Record last updated2010 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in Castro Valley → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Marc Munoz, P.A.Castro Valley, CA 945461013186956
- Judy Nogales-Chapman, PA-CCastro Valley, CA 945461720075914
- Edward Caccioppo, P.A.Hayward, CA 945451992782635
- Mark ChanHayward, CA 945451740639442
- Claudia Heath, PA-CHayward, CA 945451275608507
- Mark MeddersHayward, CA 945451952713711
- Isabel Papp, PAHayward, CA 945451063488591
- Casey HenningHayward, CA 945441487267779
Common questions
What is Sandi T. Woo, PA-C's NPI number?
Sandi T. Woo, PA-C's National Provider Identifier (NPI) is 1225103161, issued on Nov 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sandi T. Woo, PA-C located?
The NPPES record lists a practice address at 20126 Stanton Ave #100, Castro Valley, CA, 94546. Phone: (510) 537-3556. Providers update this record themselves, so call before visiting.
How can I verify Sandi T. Woo, PA-C's license?
NPPES lists California license number PA18589, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Sandi T. Woo, PA-C prescribe under Medicare Part D?
In 2024, Sandi T. Woo, PA-C had 2,428 Medicare Part D claims for 835 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.