NPI registry status
Active
2026 NPPES data Pharmacist NPI 1538639943 PHARMD
Verify on CMS → Tanya Nguyen, PHARMD
Pharmacist in Whittier, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 291,043 in Pharmacist, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
What the federal data shows
Tanya Nguyen, PHARMD is a Pharmacist in Whittier, California, listed in the federal CMS National Provider Identifier registry.
- #5
- Pharmacist rank among California specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1538639943 · Pharmacist
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-NONE · BOOK-MID · PHOTO-ENUM
- NPI-10 1538639943
- ENUM-RECENT 2018
- TAX-MEGA 291K Pharmacist
- RX-NONE No Part D
- BOOK-MID 32,376 in California
- PHOTO-ENUM Clark Bishop · 2018
What does the federal data show about Tanya Nguyen, PHARMD?
Quality data not reportedPrimary specialty
Pharmacist
Specialty distribution in California
How Pharmacist compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Pharmacist. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1538639943 |
|---|---|
| Specialty | Pharmacist |
| Credentials | PHARMD |
| Gender | Female |
| NPI Issued | 11/28/2018 |
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Tanya Nguyen, PHARMD. To verify Tanya Nguyen, PHARMD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Pharmacist Overview
How Tanya Nguyen, PHARMD fits within the Pharmacist landscape nationally.
291,043
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider
Nationwide Pharmacist peers with similar MIPS or enrollment year
Two federal-record peer sets for Nguyen, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2018)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pharmacist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Nguyen.
One of 32,376 Pharmacist providers enrolled in California, 5 are shown here.
Dr. Caroline A-Haja
PHARM.D.
San Pedro, CA
Gayatri Aachi
Livermore, CA
Dr. Mahshid Aalam
PHARMD
Los Angeles, CA
Jaleh Aaliiveli
San Ramon, CA
Dr. Cassi Aarvig
RPH
Tracy, CA
Compare Pharmacist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Tanya Nguyen, PHARMD's specialty? ▼
Tanya Nguyen, PHARMD specializes in Pharmacist and practices in Whittier, California. Credentials: PHARMD.
Where is Tanya Nguyen, PHARMD located? ▼
Tanya Nguyen, PHARMD is located at 15466 WHITTIER BLVD, Whittier, CA, 90603. Phone: (562) 943-9303.
What is Tanya Nguyen, PHARMD's NPI number? ▼
Tanya Nguyen, PHARMD's National Provider Identifier (NPI) is 1538639943, issued on 11/28/2018.
How many Pharmacist providers are there in the US? ▼
There are 291,043 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
Does Tanya Nguyen, PHARMD accept Medicare? ▼
Tanya Nguyen, PHARMD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tanya Nguyen, PHARMD's credentials? ▼
Tanya Nguyen, PHARMD's NPI is 1538639943 with credentials PHARMD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.