NPI registry status
Active
2026 NPPES data Specialist NPI 1013013416 MD
Verify on CMS → Duc Nguyen, MD
Specialist in Redwood City, 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
381
Medicare Part D claims · 142 beneficiaries · Specialist avg: 1K
MIPS score
75/100
CMS neutral threshold · no category scores published
Industry payments
$77.78
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Duc Nguyen, MD carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 381 Medicare Part D claims in 2023.
- 75/100
- CMS neutral score · not measured
- 381
- Part D claims, 2023
- $77.78
- industry payments (Sunshine Act)
- ≥57th
- 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 1013013416 · Specialist
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-NEUTRAL · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1013013416
- ENUM-LEGACY 2006
- TAX-MEGA 70K Specialist
- MIPS-NEUTRAL 75/100
- RX-LIGHT 381
- BOOK-MID 6,672 in California
- PHOTO-ENUM Joseph Danto · 2006
Duc Nguyen, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
381 ≥ 57th percentile 57% 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 Duc Nguyen, MD?
CMS neutral score, not measuredPrimary specialty
Specialist
Medicare Part D claims
381 74% vs specialty avg
MIPS final score
75/100
Specialty distribution in California
How Specialist compares to other specialties among California providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
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 | 1013013416 |
|---|---|
| Specialty | Specialist |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 09/15/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Individual
Hospital and facility affiliations
Facilities where Duc Nguyen, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
County OF San Mateo
San Mateo, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Duc Nguyen, MD. Source: openpaymentsdata.cms.gov.
Total received
$78
Largest payer
Abbott Laboratories
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 Duc Nguyen, MD. To verify Duc Nguyen, MD'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.
381
Total Claims
$5K
Total Drug Cost
142
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 404
- Total Day Supply
- 7,967
- Generic Drug Cost
- $3K
- Opioid Claims
- 118 (31.0% rate)
- Antibiotic Claims
- 13
Patient Demographics
- Average Patient Age
- 76.1 years
- Avg HCC Risk Score
- 1.27
- Gender Split
- 59% female / 41% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Duc Nguyen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Meloxicam
Meloxicam
89 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
70 claims
- Naproxen
Naproxen
45 claims
- Gabapentin
Gabapentin
40 claims
- Methylprednisolone
Methylprednisolone
36 claims
- Tramadol Hcl 19
Tramadol Hcl
19 claims
- Acetaminophen-Code… 14
Acetaminophen-Codeine
14 claims
- Oxycodone-Acetamin… 13
Oxycodone-Acetaminophen
13 claims
| Drug | Claims |
|---|---|
| Meloxicam | 89 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 70 |
| Naproxen | 45 |
| Gabapentin | 40 |
| Methylprednisolone | 36 |
| Tramadol Hcl | 19 |
| Acetaminophen-Codeine Acetaminophen With Codeine | 14 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 13 |
| Ibuprofen | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Duc Nguyen, MD fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Duc Nguyen, MD's 381 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.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
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 Duc Nguyen, MD's specialty? ▼
Duc Nguyen, MD specializes in Specialist and practices in Redwood City, California. Credentials: MD.
How much does Duc Nguyen, MD prescribe under Medicare Part D? ▼
In 2023, Duc Nguyen, MD wrote 381 Medicare Part D claims totaling $5K in drug costs for 142 beneficiaries.
What is Duc Nguyen, MD's Medicare quality score? ▼
Duc Nguyen, MD has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Duc Nguyen, MD located? ▼
Duc Nguyen, MD is located at 2900 WHIPPLE AVE, Redwood City, CA, 94062. Phone: (650) 365-5996.
What is Duc Nguyen, MD's NPI number? ▼
Duc Nguyen, MD's National Provider Identifier (NPI) is 1013013416, issued on 09/15/2006.
Does Duc Nguyen, MD prescribe opioids? ▼
Yes, Duc Nguyen, MD had 118 opioid claims in 2023 with an opioid prescribing rate of 31.0%.
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 Duc Nguyen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Duc Nguyen, MD's most frequently prescribed drugs include Meloxicam, Hydrocodone-Acetaminophen, Naproxen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Duc Nguyen, MD accept Medicare? ▼
Duc Nguyen, MD appears in CMS Medicare data with 381 Part D claims and 142 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Duc Nguyen, MD's credentials? ▼
Duc Nguyen, MD's NPI is 1013013416 with credentials MD. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.