NPPES file of Aug 9, 2026

Anna Teresa Mendoza Tsay, ANP-BC

Adult Health Nurse Practitioner · Los Angeles, CA

Anna Teresa Mendoza Tsay, ANP-BC is an adult health nurse practitioner with a practice address in Los Angeles, California, and NPI 1003058348, issued on Apr 1, 2009. Check the license (California 18500, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1003058348
Name
Anna Teresa Mendoza Tsay
Credential
ANP-BC
Primary taxonomy
Adult Health Nurse Practitioner 363LA2200X
License number
18500 CA
Self-reported in NPPES; status is on the state search
Practice location
3913 York Blvd, Los Angeles, CA 90065
Phone
(323) 532-1900
Enumerated
Apr 1, 2009
Record last updated
Oct 7, 2021 (not updated in 5 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest adult health nurse practitioner records → All 1,405 in California → Look up another NPI →

Verify Anna Teresa Mendoza Tsay in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 18500    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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98% fewer Medicare Part D claims than the average adult health nurse practitioner in 2024

24 Medicare Part D claims for 19 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D.

  1. Anna Teresa Tsay24
  2. Specialty average1,280

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.

Anna Teresa Mendoza Tsay among 1,405 adult health nurse practitioner records in California

Anna Teresa Mendoza Tsay, ANP-BC is one of 1,405 adult health nurse practitioner records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 34% of them.

  • NPI issued2009 · 34% of these records are older, 63% newer
  • In a Medicare fileYes · 56% of these records are
  • In the CMS Doctors and Clinicians fileNo · 31% of these records are
  • Record last updated2021 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Adult Health Nurse Practitioner providers in California

There are 1,405 adult health nurse practitioner records in California.

All 1,405 in California → Every provider in Los Angeles → Adult Health Nurse Practitioner nationwide →

The 8 adult health nurse practitioner records with the nearest ZIP codes

  1. Barbara Burns, NURSE PRACTITIONERLos Angeles, CA 900661366472987
  2. Bita BankianLos Angeles, CA 900671558182436
  3. Maloise Arcaya, NP-C, AGPCNP-BCLos Angeles, CA 900711861931289
  4. Ariel Baria, MSN-NPLos Angeles, CA 900731972555431
  5. Cleopatra Beaton, RN, NPLos Angeles, CA 900731518076413
  6. Marla Horn, RN, MSN, NP,CSLos Angeles, CA 900731417997099
  7. Tina Keller, RN, MSN, APRN-BCLos Angeles, CA 900731558407874
  8. Loann Nguyen, NPLos Angeles, CA 900731972697480

Common questions

What is Anna Teresa Mendoza Tsay, ANP-BC's NPI number?

Anna Teresa Mendoza Tsay, ANP-BC's National Provider Identifier (NPI) is 1003058348, issued on Apr 1, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Anna Teresa Mendoza Tsay, ANP-BC located?

The NPPES record lists a practice address at 3913 York Blvd, Los Angeles, CA, 90065. Phone: (323) 532-1900. Providers update this record themselves, so call before visiting.

How can I verify Anna Teresa Mendoza Tsay, ANP-BC's license?

NPPES lists California license number 18500, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Anna Teresa Mendoza Tsay, ANP-BC prescribe under Medicare Part D?

In 2024, Anna Teresa Mendoza Tsay, ANP-BC had 24 Medicare Part D claims for 19 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.