Andrew Chao, M.D.
NPI 1740570514 · Gastroenterology Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Chao, M.D. is a Gastroenterology Physician provider in Sacramento, CA (NPI 1740570514).
Provider details
- NPI number
- 1740570514
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A129504 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
15 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 244 | 236 |
| Pantoprazole Sodium | 209 | 63 |
| Mesalamine | 137 | 37 |
| Cholestyramine (with Sugar)brand: Cholestyramine | 54 | 17 |
| Omeprazole | 50 | 15 |
| Lubiprostone | 49 | — |
| Esomeprazole Magnesium | 39 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$245 across 2 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
- 2011-04-13
- Last updated
- 2021-12-16
Frequently asked questions
- What is Andrew Chao's NPI number?
- Andrew Chao's National Provider Identifier (NPI) is 1740570514, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Chao's specialty?
- Andrew Chao is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Chao located?
- Andrew Chao's practice location on file with NPPES is 4150 V St Ste 3500, Sacramento, CA 95817-1460.
- What is Andrew Chao's phone number?
- The practice phone number listed in the NPPES registry for Andrew Chao is (916) 734-3751.
- Does Andrew Chao accept Medicare?
- Andrew Chao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Chao's NPI active?
- Yes — Andrew Chao's NPI (1740570514) is active in the NPPES registry as of the last update on 2021-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.