NPI registry status
Active
2026 NPPES data Trauma Surgery Physician NPI 1922116987 M.D.
Verify on CMS → Dinh Nguyen, M.D.
Trauma Surgery Physician in Oakland, 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 959 in Trauma Surgery Physician, 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
112
Medicare Part D claims · 61 beneficiaries · Trauma Surgery Physician avg: 70
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Dinh Nguyen, M.D. filed 112 Medicare Part D claims in 2023 as a Trauma Surgery Physician in Oakland, California.
- 112
- Part D claims, 2023
- Likely
- board-certified (heuristic)
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.
Dinh Nguyen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
112 35th percentile higher than 35% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Dinh Nguyen, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Dinh Nguyen, M.D.?
Quality data not reportedPrimary specialty
Trauma Surgery Physician
Medicare Part D claims
112 60% vs specialty avg
Specialty distribution in California
How Trauma Surgery Physician 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 Trauma Surgery Physician. 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).
Dinh Nguyen, M.D. appears in the CMS NPPES registry as a Trauma Surgery Physician provider holding M.D. credentials at 1800 HARRISON ST FL 7, Oakland, CA, 94612, with a listed phone of (510) 625-6262. NPI 1922116987 was issued on 08/29/2006.
Medicare Part D records for calendar year 2023 show 112 prescription claims written by this provider, covering 61 Medicare beneficiaries and totaling roughly $1K in drug spend, with an opioid prescribing rate of 42.0%.
Trauma Surgery Physician is a narrow specialty nationwide, with 959 enrolled providers across 49 states and an average of 70 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1922116987 |
|---|---|
| Specialty | Trauma Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/29/2006 |
Hospital and facility affiliations
Facilities where Dinh Nguyen, M.D. 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.
Permanente Medical Group Inc
Walnut Creek, 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).
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 Dinh Nguyen, M.D.. To verify Dinh 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.
112
Total Claims
$1K
Total Drug Cost
61
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 112
- Total Day Supply
- 751
- Brand Drug Cost
- $0
- Generic Drug Cost
- $1K
- Opioid Claims
- 47 (42.0% rate)
- Antibiotic Claims
- 23
Patient Demographics
- Average Patient Age
- 74.3 years
- Avg HCC Risk Score
- 0.92
- Gender Split
- 41% female / 59% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 46 |
| Ibuprofen | 39 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Trauma Surgery Physician Overview
How Dinh Nguyen, M.D. fits within the Trauma Surgery Physician landscape nationally.
959
Trauma Surgery Physician Providers in US
49
States with Trauma Surgery Physician
70
Avg Claims per Provider
Dinh Nguyen, M.D.'s 112 claims are above the specialty average of 70.
Nearby Trauma Surgery Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Nguyen.
Dr. Amir Amiri
M.D.
Sacramento, CA
Dr. John Anderson
M.D.
Sacramento, CA
Dr. Maxine Anderson
M.D.
Lynwood, CA
Dr. Walid Arnaout
M.D.
Northridge, CA
Dr. Nichole Atherton
MD
Visalia, CA
Compare Trauma Surgery Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Trauma Surgery Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Dinh Nguyen, M.D.'s specialty? ▼
Dinh Nguyen, M.D. specializes in Trauma Surgery Physician and practices in Oakland, California. Credentials: M.D..
How much does Dinh Nguyen, M.D. prescribe under Medicare Part D? ▼
In 2023, Dinh Nguyen, M.D. wrote 112 Medicare Part D claims totaling $1K in drug costs for 61 beneficiaries.
Where is Dinh Nguyen, M.D. located? ▼
Dinh Nguyen, M.D. is located at 1800 HARRISON ST FL 7, Oakland, CA, 94612. Phone: (510) 625-6262.
What is Dinh Nguyen, M.D.'s NPI number? ▼
Dinh Nguyen, M.D.'s National Provider Identifier (NPI) is 1922116987, issued on 08/29/2006.
Does Dinh Nguyen, M.D. prescribe opioids? ▼
Yes, Dinh Nguyen, M.D. had 47 opioid claims in 2023 with an opioid prescribing rate of 42.0%.
How many Trauma Surgery Physician providers are there in the US? ▼
There are 959 Trauma Surgery Physician providers across 49 states in the US. The average Trauma Surgery Physician provider writes 70 Medicare Part D claims per year.
What drugs does Dinh Nguyen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Dinh Nguyen, M.D.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dinh Nguyen, M.D. accept Medicare? ▼
Dinh Nguyen, M.D. appears in CMS Medicare data with 112 Part D claims and 61 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dinh Nguyen, M.D.'s credentials? ▼
Dinh Nguyen, M.D.'s NPI is 1922116987 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
Compiled from official public sources by the PlainDoctor editorial team.