Sandi Woo, PA-C
NPI 1225103161 · Medical Physician Assistant · Castro Valley, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sandi Woo, PA-C is a Medical Physician Assistant provider in Castro Valley, CA (NPI 1225103161).
Provider details
- NPI number
- 1225103161
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- PA18589 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
934 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 469 | $112 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 195 | $130 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 68 | $164 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 46 | $74 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 46 | $110 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System93288 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 246 | 92 |
| Metoprolol Succinate | 243 | 116 |
| Atorvastatin Calcium | 185 | 88 |
| Carvedilol | 142 | 59 |
| Rosuvastatin Calcium | 92 | 39 |
| Sacubitril/Valsartanbrand: Entresto | 89 | 33 |
| Rivaroxaban |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$679 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-22
- Last updated
- 2010-07-01
Frequently asked questions
- What is Sandi Woo's NPI number?
- Sandi Woo's National Provider Identifier (NPI) is 1225103161, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sandi Woo's specialty?
- Sandi Woo is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sandi Woo located?
- Sandi Woo's practice location on file with NPPES is 20126 Stanton Ave #100, Castro Valley, CA 94546-5367.
- What is Sandi Woo's phone number?
- The practice phone number listed in the NPPES registry for Sandi Woo is (510) 537-3556.
- Does Sandi Woo accept Medicare?
- Sandi Woo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sandi Woo's NPI active?
- Yes — Sandi Woo's NPI (1225103161) is active in the NPPES registry as of the last update on 2010-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.