NPI registry status
Active
2026 NPPES data Contractor NPI 1669415857 M.D.
Verify on CMS → Chi Du, M.D.
Contractor in Yuba 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 8,794 in Contractor, 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
3K
Medicare Part D claims · 185 beneficiaries · Contractor avg: 979
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$424.36
6 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Chi Du, M.D. filed 3,488 Medicare Part D claims in 2024 as a Contractor in Yuba City, California, prescribing 88% generic.
- 3K
- Part D claims, 2024
- 88%
- generic prescribing
- $424.36
- industry payments (Sunshine Act)
- ≥90th
- 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.
Federal trust snapshot
What official records show about Chi Du, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1669415857), first enumerated 06/14/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,488 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Industry payment transparency
$424.36 in reported industry payments (6 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Chi Du, M.D.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1669415857 · Contractor
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1669415857
- ENUM-LEGACY 2006
- TAX-MID 9K Contractor
- RX-MID 3,488
- BOOK-THIN 494 in California
- PHOTO-ENUM Carron Jett · 2006
Chi Du, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,488 ≥ 90th percentile 90% of 1,416,883 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 · 2024
What does the federal data show about Chi Du, M.D.?
Quality data not reportedPrimary specialty
Contractor
Medicare Part D claims
3,488 256% vs specialty avg
Specialty distribution in California
How Contractor 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 Contractor. 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 | 1669415857 |
|---|---|
| Specialty | Contractor |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/14/2006 |
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 Chi Du, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$424
Largest payer
AstraZeneca Pharmaceuticals LP
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 Chi Du, M.D.. To verify Chi Du, 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.
Brand vs generic prescribing mix · Typical
Chi Du, M.D. - brand share 11.0%
Contractor average
11% brand-name claims vs 88% generic, on 3,488 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
3,488
Total Claims
$277K
Total Drug Cost
185
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,526.2
- Total Day Supply
- 219,296
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $234K
- Generic Drug Cost
- $42K
- Opioid Claims
- 160 (4.6% rate)
- Antibiotic Claims
- 85
Patient Demographics
- Average Patient Age
- 73.0 years
- Avg HCC Risk Score
- 0.94
- Gender Split
- 72% female / 28% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Chi Du, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Montelukast Sodium
Montelukast Sodium
177 claims
- Gabapentin
Gabapentin
138 claims
- Levothyroxine Sodium
Levothyroxine Sodium
121 claims
- Atorvastatin Calcium
Atorvastatin Calcium
110 claims
- Omeprazole
Omeprazole
107 claims
- Metformin Hcl Er
Metformin Hcl Er
86 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
85 claims
- Amlodipine Besylate
Amlodipine Besylate
81 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 177 |
| Gabapentin | 138 |
| Levothyroxine Sodium | 121 |
| Atorvastatin Calcium | 110 |
| Omeprazole | 107 |
| Metformin Hcl Er Metformin Hcl | 86 |
| Rosuvastatin Calcium | 85 |
| Amlodipine Besylate | 81 |
| Duloxetine Hcl | 74 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 73 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Contractor Overview
How Chi Du, M.D. fits within the Contractor landscape nationally.
8,794
Contractor Providers in US
54
States with Contractor
979
Avg Claims per Provider
Chi Du, M.D.'s 3,488 claims are above the specialty average of 979.
Nationwide Contractor peers with similar MIPS or enrollment year
Two federal-record peer sets for Du, 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 Contractor Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Du.
One of 494 Contractor providers enrolled in California, 5 are shown here.
Jamal Abdel-Hadi
Riverside, CA
Dr. Taha Abdelaal
M.D
Rancho Cucamonga, CA
Aminah Abdul-Hakim
MBA, BS
Apple Valley, CA
Linda Abrams
Santa Monica, CA
Sunday Achi Ayah
Sacramento, CA
Compare Contractor nationally: see state-by-state distribution →
Frequently Asked Questions
What is Chi Du, M.D.'s specialty? ▼
Chi Du, M.D. specializes in Contractor and practices in Yuba City, California. Credentials: M.D..
How much does Chi Du, M.D. prescribe under Medicare Part D? ▼
In 2024, Chi Du, M.D. wrote 3,488 Medicare Part D claims totaling $277K in drug costs for 185 beneficiaries.
Where is Chi Du, M.D. located? ▼
Chi Du, M.D. is located at 1172 LIVE OAK BLVD, Yuba City, CA, 95991. Phone: (530) 673-3391.
What is Chi Du, M.D.'s NPI number? ▼
Chi Du, M.D.'s National Provider Identifier (NPI) is 1669415857, issued on 06/14/2006.
Does Chi Du, M.D. prescribe more brand-name or generic drugs? ▼
Chi Du, M.D.'s prescribing is 11% brand-name and 88% generic drugs by claim count, with $234K in brand drug costs.
Does Chi Du, M.D. prescribe opioids? ▼
Yes, Chi Du, M.D. had 160 opioid claims in 2024 with an opioid prescribing rate of 4.6%.
How many Contractor providers are there in the US? ▼
There are 8,794 Contractor providers across 54 states in the US. The average Contractor provider writes 979 Medicare Part D claims per year.
What drugs does Chi Du, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Chi Du, M.D.'s most frequently prescribed drugs include Montelukast Sodium, Gabapentin, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Chi Du, M.D. accept Medicare? ▼
Chi Du, M.D. appears in CMS Medicare data with 3,488 Part D claims and 185 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chi Du, M.D.'s credentials? ▼
Chi Du, M.D.'s NPI is 1669415857 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.