Allan S. Au, M.D.
NPI 1427495563ActiveIndividual· Hospitalist· Fairfield, CA
Hospitalist (M.D.) with Northbay Physicians Surgery Center, LLC, practicing in Fairfield, California. In 2024 Medicare paid $61,832 for 282 patients, and Part D covered 236 of their prescriptions, 89% of them generic. Lists Northbay Medical Center as a hospital affiliation.
Overview
| NPI | 1427495563 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 30, 2013 |
| Last updated in NPPES | Dec 19, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | A146155 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hospitalist (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 282 |
|---|---|
| Services billed | 744 across 8 procedure codes |
| Paid by Medicare | $61,832 |
Part D prescriptions in 2024
| Prescriptions (claims) | 236 · 251 30-day fills |
|---|---|
| Patients | 98 |
| Total drug cost | $9,880 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Hospitalist |
| Secondary specialties | Internal Medicine |
Medical group
- Northbay Physicians Surgery Center, LLCFairfield, CA · 324 clinicians
Hospital affiliation
- Northbay Medical CenterFairfield, CA
Other facilities
- Bristol Hospice - East BayHospice · Pleasanton, CA
- Bristol Hospice - Sacramento, LLCHospice · Roseville, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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