NPI registry status
Active
2026 NPPES data Neuromuscular Medicine (Psychiatry & Neurology) Physician NPI 1861925844 MD
Verify on CMS → Fanny Du, MD
Neuromuscular Medicine (Psychiatry & Neurology) Physician in San Leandro, 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 338 in Neuromuscular Medicine (Psychiatry & Neurology) 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
407
Medicare Part D claims · 134 beneficiaries · Neuromuscular Medicine (Psychiatry & Neurology) Physician avg: 931
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Fanny Du, MD filed 407 Medicare Part D claims in 2023 as a Neuromuscular Medicine (Psychiatry & Neurology) Physician in San Leandro, California.
- 407
- 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.
Fanny Du, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
407 Top 38% higher than 62% 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)
Fanny Du, MD 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 Fanny Du, MD?
Quality data not reportedPrimary specialty
Neuromuscular Medicine (Psychiatry & Neurology) Physician
Medicare Part D claims
407 56% vs specialty avg
Specialty distribution in California
How Neuromuscular Medicine (Psychiatry & Neurology) 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 Neuromuscular Medicine (Psychiatry & Neurology) 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).
Fanny Du, MD appears in the CMS NPPES registry as a Neuromuscular Medicine (Psychiatry & Neurology) Physician provider holding MD credentials at 2500 MERCED ST FL 2, San Leandro, CA, 94577, with a listed phone of (510) 454-3180. NPI 1861925844 was issued on 04/06/2017.
Medicare Part D records for calendar year 2023 show 407 prescription claims written by this provider, covering 134 Medicare beneficiaries and totaling roughly $57K in drug spend.
Neuromuscular Medicine (Psychiatry & Neurology) Physician is a narrow specialty nationwide, with 338 enrolled providers across 44 states and an average of 931 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 | 1861925844 |
|---|---|
| Specialty | Neuromuscular Medicine (Psychiatry & Neurology) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/06/2017 |
Hospital and facility affiliations
Facilities where Fanny Du, 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.
Permanente Medical Group Inc
San Leandro, 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 Fanny Du, MD. To verify Fanny Du, 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.
407
Total Claims
$57K
Total Drug Cost
134
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 758
- Total Day Supply
- 21,947
- Generic Drug Cost
- $13K
Patient Demographics
- Average Patient Age
- 72.9 years
- Avg HCC Risk Score
- 1.55
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 17, 65-74: 51, 75-84: 48, 85+: 18
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Fanny Du, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Carbidopa-Levodopa
Carbidopa-Levodopa
136 claims
- Levetiracetam
Levetiracetam
57 claims
- Lamotrigine 28
Lamotrigine
28 claims
- Atorvastatin Calcium 16
Atorvastatin Calcium
16 claims
- Pregabalin 14
Pregabalin
14 claims
- Carbidopa-Levodopa… 12
Carbidopa-Levodopa Er
12 claims
- Propranolol Hcl Er 12
Propranolol Hcl Er
12 claims
- Clonazepam 11
Clonazepam
11 claims
| Drug | Claims |
|---|---|
| Carbidopa-Levodopa Carbidopa/Levodopa | 136 |
| Levetiracetam | 57 |
| Lamotrigine | 28 |
| Atorvastatin Calcium | 16 |
| Pregabalin | 14 |
| Carbidopa-Levodopa Er Carbidopa/Levodopa | 12 |
| Propranolol Hcl Er Propranolol Hcl | 12 |
| Clonazepam | 11 |
| Donepezil Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Neuromuscular Medicine (Psychiatry & Neurology) Physician in CA →
All providers in California →
Compare specialties →
Neuromuscular Medicine (Psychiatry & Neurology) Physician Overview
How Fanny Du, MD fits within the Neuromuscular Medicine (Psychiatry & Neurology) Physician landscape nationally.
338
Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in US
44
States with Neuromuscular Medicine (Psychiatry & Neurology) Physician
931
Avg Claims per Provider
Fanny Du, MD's 407 claims are below the specialty average of 931.
Nearby Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Du.
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 Neuromuscular Medicine (Psychiatry & Neurology) 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 Fanny Du, MD's specialty? ▼
Fanny Du, MD specializes in Neuromuscular Medicine (Psychiatry & Neurology) Physician and practices in San Leandro, California. Credentials: MD.
How much does Fanny Du, MD prescribe under Medicare Part D? ▼
In 2023, Fanny Du, MD wrote 407 Medicare Part D claims totaling $57K in drug costs for 134 beneficiaries.
Where is Fanny Du, MD located? ▼
Fanny Du, MD is located at 2500 MERCED ST FL 2, San Leandro, CA, 94577. Phone: (510) 454-3180.
What is Fanny Du, MD's NPI number? ▼
Fanny Du, MD's National Provider Identifier (NPI) is 1861925844, issued on 04/06/2017.
How many Neuromuscular Medicine (Psychiatry & Neurology) Physician providers are there in the US? ▼
There are 338 Neuromuscular Medicine (Psychiatry & Neurology) Physician providers across 44 states in the US. The average Neuromuscular Medicine (Psychiatry & Neurology) Physician provider writes 931 Medicare Part D claims per year.
What drugs does Fanny Du, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Fanny Du, MD's most frequently prescribed drugs include Carbidopa-Levodopa, Levetiracetam, Lamotrigine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Fanny Du, MD accept Medicare? ▼
Fanny Du, MD appears in CMS Medicare data with 407 Part D claims and 134 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Fanny Du, MD's credentials? ▼
Fanny Du, MD's NPI is 1861925844 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.
- 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.