NPI registry status
Active
2026 NPPES data Specialist NPI 1760402770 M.D.
Verify on CMS → Quan Nguyen, M.D.
Specialist in Fountain Valley, 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 69,608 in Specialist, 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.
Prescribing volume
1K
Medicare Part D claims · 447 beneficiaries · Specialist avg: 1K
Industry payments
$3.2K
109 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Quan Nguyen, M.D. filed 1,289 Medicare Part D claims in 2023 as a Specialist in Fountain Valley, California.
- 1K
- Part D claims, 2023
- $3.2K
- industry payments (Sunshine Act)
- ≥78th
- pct by Part D claim volume (lower-bound band)
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 1760402770 · Specialist
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1760402770
- ENUM-LEGACY 2006
- TAX-MEGA 70K Specialist
- RX-MID 1,289
- BOOK-MID 6,672 in California
- PHOTO-ENUM Margaret Chou · 2006
Quan Nguyen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,289 ≥ 78th percentile 78% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Quan Nguyen, M.D.?
Quality data not reportedPrimary specialty
Specialist
Medicare Part D claims
1,289 13% vs specialty avg
Specialty distribution in California
How Specialist 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 Specialist. 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 | 1760402770 |
|---|---|
| Specialty | Specialist |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/20/2006 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Quan Nguyen, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$3.2K
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
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 Quan Nguyen, M.D.. To verify Quan Nguyen, M.D.'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,289
Total Claims
$687K
Total Drug Cost
447
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,355
- Total Day Supply
- 37,470
- Generic Drug Cost
- $76K
- Antibiotic Claims
- 74
Patient Demographics
- Average Patient Age
- 73.5 years
- Avg HCC Risk Score
- 1.28
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 23, 65-74: 245, 75-84: 138, 85+: 41
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Quan Nguyen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Triamcinolone Acet…
Triamcinolone Acetonide
175 claims
- Fluocinonide
Fluocinonide
164 claims
- Ketoconazole
Ketoconazole
79 claims
- Mometasone Furoate
Mometasone Furoate
79 claims
- Hydroxyzine Hcl 63
Hydroxyzine Hcl
63 claims
- Hydrocortisone 61
Hydrocortisone
61 claims
- Clotrimazole-Betam… 50
Clotrimazole-Betamethasone
50 claims
- Betamethasone Dipr… 48
Betamethasone Dipropionate
48 claims
| Drug | Claims |
|---|---|
| Triamcinolone Acetonide | 175 |
| Fluocinonide | 164 |
| Ketoconazole | 79 |
| Mometasone Furoate | 79 |
| Hydroxyzine Hcl | 63 |
| Hydrocortisone | 61 |
| Clotrimazole-Betamethasone Clotrimazole/Betamethasone Dip | 50 |
| Betamethasone Dipropionate | 48 |
| Clobetasol Propionate | 44 |
| Calcipotriene-Betamethasone Calcipotriene/Betamethasone | 36 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Quan Nguyen, M.D. fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Quan Nguyen, M.D.'s 1,289 claims are below the specialty average of 1,474.
Nationwide Specialist 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 (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Specialist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Nguyen.
One of 6,672 Specialist providers enrolled in California, 5 are shown here.
Adrienne Abad Santos
San Francisco, CA
Dr. Brenda Abarca
MD
Torrance, CA
Dr. Fatemeh Abbasi
PT
Van Nuys, CA
Dr. Erlinda Abcede
M.D.
Cudahy, CA
Dr. Maher Abdallah
M.D.
Palm Springs, CA
Compare Specialist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Quan Nguyen, M.D.'s specialty? ▼
Quan Nguyen, M.D. specializes in Specialist and practices in Fountain Valley, California. Credentials: M.D..
How much does Quan Nguyen, M.D. prescribe under Medicare Part D? ▼
In 2023, Quan Nguyen, M.D. wrote 1,289 Medicare Part D claims totaling $687K in drug costs for 447 beneficiaries.
Where is Quan Nguyen, M.D. located? ▼
Quan Nguyen, M.D. is located at 10175 SLATER AVE STE 100, Fountain Valley, CA, 92708. Phone: (714) 979-9911.
What is Quan Nguyen, M.D.'s NPI number? ▼
Quan Nguyen, M.D.'s National Provider Identifier (NPI) is 1760402770, issued on 07/20/2006.
How many Specialist providers are there in the US? ▼
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Quan Nguyen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Quan Nguyen, M.D.'s most frequently prescribed drugs include Triamcinolone Acetonide, Fluocinonide, Ketoconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Quan Nguyen, M.D. accept Medicare? ▼
Quan Nguyen, M.D. appears in CMS Medicare data with 1,289 Part D claims and 447 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Quan Nguyen, M.D.'s credentials? ▼
Quan Nguyen, M.D.'s NPI is 1760402770 with credentials M.D.. 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.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- 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.