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Dr. Allan S. Au, MD
NPI1427495563PAC ID6507141421
- Medicare services, 2024
- 733
- Medicare patients, 2024
- 282
- Part D claims, 2024
- 236
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 1200 B Gale Wilson Blvd, Fairfield, CA 94533
- Practice phone
- Call (707) 646-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Au's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Allan S. Au is a hospitalist in Fairfield, California
Dr. Au practices at NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare.
Dr. Au's NPI, 1427495563, was assigned on May 30, 2013. Dr. Au graduated from St. George's University School of Medicine in 2013. Dr. Au's California license number on file is A146155.
NPI and contact details
- NPI
- 1427495563NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507141421
- NPI enumeration date
- May 30, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 646-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Allan S. Au practices at NorthBay Medical Center in Fairfield, California
Dr. Au's primary practice is NorthBay Medical Center, at 1200 B Gale Wilson Blvd, Fairfield, CA 94533 in Solano County. The practice phone is (707) 646-5000.
- NorthBay Medical Center1200 B Gale Wilson Blvd, Fairfield, CA 94533 · Solano CountyPhone(707) 646-5000
Source: Dmand AI Affiliation Data
Dr. Allan S. Au is affiliated with 3 sites of care and 2 medical groups
Dr. Au's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. The medical group on file is NorthBay Medical Center. Dmand AI also links Dr. Au to 2 more hospices and 1 medical group, each named with a free account. Dr. Au's employer is on file too: a hospital.
NorthBay Medical Center2 hospicesNames with a free account1 medical groupName with a free accountEmployer: hospitalName with a free account
See all 5 affiliations for Dr. AuSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Allan S. Au's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Au practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NorthBay Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Allan S. Au is one of 3,186 hospitalists in California
Hospitalist is Dr. Au's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Au is board certified in internal medicine by the American Board of Internal Medicine. Dr. Au has a license on file in California.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
Clinical focus
Dmand AI lists acute diabetes, acute respiratory failure, acute stomach ulcer, cardiac arrhythmia, circulation problems, collapsed lung, congestive heart failure and electrolyte disorders among the conditions Dr. Au treats.
Hospitalists near Dr. Au
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Allan S. Au billed Medicare for 733 services in 2024
CMS data shows 733 Medicare services from Dr. Au across 5 procedure codes in 2024, for 282 Medicare patients. Medicare paid $61,119 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024733
Medicare patients282
Paid by Medicare$61,119
Procedure codes5
Dr. Au's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3142024: 733133%
Dr. Au compared with the California median for hospitalists, 2024
- Dr. Au
- California median
- Medicare services
- 733vs 43070% above
- Medicare patients
- 282vs 20140% above
- Part D claims
- 66vs 69Close to median
Medians across 2,991 hospitalists in California with Dmand AI profiles that report each measure.
Dr. Au's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Au?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Au and other hospitalists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Allan S. Au treated 282 Medicare patients in 2024, average age 76
CMS counts 282 Medicare patients who saw Dr. Au in 2024. The largest group is 75 to 84, with 94 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 45% are also on Medicaid. Their average risk score is 2.90, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Au's median patient age at 62, with 45% women.
Medicare patients, 2024282
Average age76
Average risk score2.90
Also on Medicaid45%
Dr. Au's Medicare patients by age, 2024
Dr. Au's Medicare patients by sex, 2024
- Women15254%
- Men13046%
Chronic conditions among Dr. Au's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Chronic kidney disease51%
- Diabetes49%
- Heart failure46%
- Ischemic heart disease44%
- Atrial fibrillation40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Au's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women45%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Allan S. Au wrote 236 Medicare Part D claims in 2024
In 2024, Dr. Au wrote 236 Medicare Part D claims for 98 patients. 89% of them were for generic drugs. CMS names the drug for 66 of them, across 3 drugs with 11 or more claims each, at $446 in total drug cost. In 2023, CMS named 48 claims across 3 drugs.
Part D claims, 2024236
Drugs named by CMS3
Total drug cost$446
Part D patients98
Dr. Au's Part D claims by kind of drug, 2024
- Generic211 claims89%
- Brand-name and other25 claims11%
Dr. Au's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Au's Part D claims, 2024
- Opioids6%13 of 236 claims
- Antibiotics31%74 of 236 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 482024: 6638%
Drugs named by CMS: 3 in 2024, 3 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Allan S. Au takes part in Medicare
Dr. Au accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Allan S. Au has 1 publication on record
Dmand AI links 1 paper to Dr. Au.
Papers1
Recent publications by Dr. Au
See who Dr. Au researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Au works with, so you can find a warm path to the right hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Allan S. Au received $34 in industry payments from 2017 to 2022
CMS Open Payments shows 2 general payments to Dr. Au from 1 drug or device company from 2017 to 2022. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $34.
General payments to Dr. Au by program year, 2017 to 2022
Companies that paid Dr. Au the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Allan S. Au graduated from St. George's University School of Medicine
Dr. Au graduated from St. George's University School of Medicine in 2013.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Allan S. Au accepts plans from 13 insurance carriers
Dr. Au is in network with 13 carriers, including Excellus BlueCross BlueShield, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Aetna
- Blue Cross Blue Shield of Massachusetts
- Elevance
- Regence Health Plans
- +5 more carriersWith a free account
Plan types Dr. Au accepts, by number of carriers
- PPO8
- HMO7
- Medicare7
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Allan S. Au's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Allan S. Au
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Allan S. Au's NPI number?
Dr. Allan S. Au's NPI number is 1427495563. It was assigned on May 30, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Allan S. Au?
Dr. Allan S. Au is a hospitalist in Fairfield, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Allan S. Au practice?
Dr. Au practices at 1200 B Gale Wilson Blvd, Fairfield, CA 94533. Dr. Au's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dmand AI also links Dr. Au to 2 hospices and 1 medical group.
What is Dr. Allan S. Au's office phone number?
The practice phone on file for Dr. Au is (707) 646-5000.
What is Dr. Allan S. Au's medical license number?
Dr. Au's California license number on file is A146155.
Which hospitals is Dr. Allan S. Au affiliated with?
Dr. Au practices at NorthBay Medical Center in Fairfield, California.
What medical group is Dr. Allan S. Au part of?
Dr. Au is linked to NorthBay Medical Center. Dmand AI links Dr. Au to 1 more medical group.
Does Dr. Allan S. Au accept Medicare?
Yes. CMS data shows Dr. Au billed Medicare for 733 services in 2024, and Dr. Au accepts Medicare assignment.
How many Medicare patients does Dr. Allan S. Au see?
CMS counts 282 Medicare patients who saw Dr. Au in 2024, with an average age of 76.
Is Dr. Allan S. Au board certified?
Yes. Dr. Au is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Allan S. Au bill to Medicare?
In 2024, Dr. Au's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
Where did Dr. Allan S. Au go to medical school?
Dr. Au graduated from St. George's University School of Medicine in 2013.
What drugs does Dr. Allan S. Au prescribe most?
In 2024 Medicare Part D data, Dr. Au's most prescribed drugs by claims were Amoxicillin-Clavulanate Potass, Doxycycline Monohydrate and Pantoprazole Sodium.
Has Dr. Allan S. Au received payments from drug or device companies?
CMS Open Payments shows $34 in general payments to Dr. Au from 1 company from 2017 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Allan S. Au been practicing?
Dr. Au graduated from medical school in 2013, 13 years ago.
Does Dr. Allan S. Au do research?
Dmand AI links 1 publication to Dr. Au.
What insurance does Dr. Allan S. Au accept?
Dr. Au is in network with 13 carriers, including Excellus BlueCross BlueShield, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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