Alvin Au, MD FACG
NPI 1477639193 · Gastroenterology Physician · Hanford, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alvin Au, MD FACG is a Gastroenterology Physician provider in Hanford, CA (NPI 1477639193).
Provider details
- NPI number
- 1477639193
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD FACG
- Sex
- Male
- Sole proprietor
- No
- License
- A45911 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
2,719 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 963 | $120 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 583 | $167 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 349 | $204 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 180 | $157 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 164 | $209 |
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 |
|---|---|---|
| Omeprazole | 615 | 185 |
| Pantoprazole Sodium | 435 | 161 |
| Famotidine | 401 | 116 |
| Linaclotidebrand: Linzess | 309 | 112 |
| Dicyclomine Hcl | 260 | 80 |
| Esomeprazole Magnesium | 98 | 36 |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 85 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,146 across 135 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
- 2006-10-27
- Last updated
- 2015-03-10
Frequently asked questions
- What is Alvin Au's NPI number?
- Alvin Au's National Provider Identifier (NPI) is 1477639193, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alvin Au's specialty?
- Alvin Au is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Alvin Au located?
- Alvin Au's practice location on file with NPPES is 1360 Bailey Dr, Hanford, CA 93230-5921.
- What is Alvin Au's phone number?
- The practice phone number listed in the NPPES registry for Alvin Au is (559) 584-6499.
- Does Alvin Au accept Medicare?
- Alvin Au is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alvin Au's NPI active?
- Yes — Alvin Au's NPI (1477639193) is active in the NPPES registry as of the last update on 2015-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.