Mary Anne Abarientos Chau
Pharmacist · Diamond Bar, CA
Mary Anne Abarientos Chau is a pharmacist with a practice address in Diamond Bar, California, and NPI 1508275645, issued on Aug 2, 2014. Check the license (California 70350, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Anne Abarientos Chau
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 70350 CA
Self-reported in NPPES; status is on the state search - Practice location
- 22504 Lark Spring Ter, Diamond Bar, CA 91765
- Phone
- (714) 394-4031
- Enumerated
- Aug 2, 2014
- Record last updated
- Oct 10, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Verify Mary Anne Abarientos Chau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 70350Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 100% of the cost of the top drugs
90 Medicare Part D claims for 74 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Arexvy34 claims
- Shingrix25 claims
- Abrysvo19 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.
Mary Anne Abarientos Chau among 32,533 pharmacist records in California
Mary Anne Abarientos Chau is one of 32,533 pharmacist records with a practice address in California. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 35% of them.
- NPI issued2014 · 35% of these records are older, 59% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2014 · 76% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
42 pharmacist records list a practice address in Diamond Bar
They are 42 of the 598 NPPES records with a practice address in Diamond Bar, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in Diamond Bar → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Douglas Barcon, PHARM.D.Diamond Bar, CA 917651801034525
- Jenny Chang, PHARMDDiamond Bar, CA 917651407192248
- Suzie Cho, PHARM DDiamond Bar, CA 917651972821759
- Nadia DifronzoDiamond Bar, CA 917651477805364
- Evelyn-Anh Hoang, PHARM. D.Diamond Bar, CA 917651962777813
- Hsing Hsueh, RPHDiamond Bar, CA 917651689993701
- Caleb Kim, RPHDiamond Bar, CA 917651700155066
- Steven Lew, PHARMDDiamond Bar, CA 917651669752002
Common questions
What is Mary Anne Abarientos Chau's NPI number?
Mary Anne Abarientos Chau's National Provider Identifier (NPI) is 1508275645, issued on Aug 2, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Mary Anne Abarientos Chau located?
The NPPES record lists a practice address at 22504 Lark Spring Ter, Diamond Bar, CA, 91765. Phone: (714) 394-4031. Providers update this record themselves, so call before visiting.
How can I verify Mary Anne Abarientos Chau's license?
NPPES lists California license number 70350, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Anne Abarientos Chau prescribe under Medicare Part D?
In 2024, Mary Anne Abarientos Chau had 90 Medicare Part D claims for 74 beneficiaries; the average among pharmacist prescribers was 119. 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.