Mary Chau, D.O.
Family Medicine Physician · Sun City, CA
Mary Chau, D.O. is a family medicine physician with a practice address in Sun City, California, and NPI 1255365888, issued on Jul 10, 2006. Check the license (California 20A7618, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Chau
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A7618 CA
Self-reported in NPPES; status is on the state search - Practice location
- 28125 Bradley RD, Sun City, CA 92586
- Phone
- (951) 301-6366
- Enumerated
- Jul 10, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (951) 301-6366
- Medicare enrollment
- Enrolled (PECOS I20031110000522); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 28125 Bradley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Elizabeth Sheppard, LCSWClinical Social Worker1508276759
- Michael Tucci, D.C.Chiropractor1194797332
Verify Mary Chau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7618Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average family medicine physician in 2024
3,600 Medicare Part D claims for 236 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium314 claims
- Lisinopril228 claims
- Amlodipine Besylate177 claims
- Losartan Potassium125 claims
- Metoprolol Succinate122 claims
- Levothyroxine Sodium117 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $14.93
1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
4 family medicine physician records list a practice address in Sun City
They are 4 of the 137 NPPES records with a practice address in Sun City, and 17,133 family medicine physician records in California.
All 4 in Sun City → All 17,133 in California → Every provider in Sun City →
Other family medicine physician records in California
- Omer Aba-Omer, MDSanta Monica, CA1649702093
- Michelle Ababa, MDWilmington, CA1710922513
- Anna Tzeitel Abalos, MDRoseville, CA1720200017
- Adan Abarca, MDAnaheim, CA1760553689
- Vanessa Abarca, DOVentura, CA1952040859
- Lorraine Abate, M.D.Sacramento, CA1104840008
- Robert Abatecola, MDCastro Valley, CA1669551719
- Romeo Abaya, M.D.Cottonwood, CA1598053506
- Effiem Abbah, MD, MPHSan Francisco, CA1821185133
- Khuzeman Abbasi, MDSanta Rosa, CA1841979952
Common questions
What is Mary Chau, D.O.'s NPI number?
Mary Chau, D.O.'s National Provider Identifier (NPI) is 1255365888, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Chau, D.O. located?
The NPPES record lists a practice address at 28125 Bradley RD, Sun City, CA, 92586. Phone: (951) 301-6366. Providers update this record themselves, so call before visiting.
How can I verify Mary Chau, D.O.'s license?
NPPES lists California license number 20A7618, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Chau, D.O. prescribe under Medicare Part D?
In 2024, Mary Chau, D.O. had 3,600 Medicare Part D claims for 236 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.