Andy Chau, M.D.
NPI 1174900104 · Hospitalist Physician · Santa Clara, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andy Chau, M.D. is a Hospitalist Physician provider in Santa Clara, CA (NPI 1174900104).
Provider details
- NPI number
- 1174900104
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 16 | 14 |
| Atorvastatin Calcium | 12 | — |
| Insulin Nph Human Isophanebrand: Humulin N | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-28
- Last updated
- 2021-12-17
Frequently asked questions
- What is Andy Chau's NPI number?
- Andy Chau's National Provider Identifier (NPI) is 1174900104, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andy Chau's specialty?
- Andy Chau is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Andy Chau located?
- Andy Chau's practice location on file with NPPES is 710 Lawrence Expy, Santa Clara, CA 95051-5173.
- What is Andy Chau's phone number?
- The practice phone number listed in the NPPES registry for Andy Chau is (408) 851-3834.
- Does Andy Chau accept Medicare?
- Andy Chau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andy Chau's NPI active?
- Yes — Andy Chau's NPI (1174900104) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.