NPI registry status
Active
2026 NPPES data Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician NPI 1265433882 M.D.
Verify on CMS → James Williams, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Peoria, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 5,070 in Thoracic Surgery (Cardiothoracic Vascular 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
406
Medicare Part D claims · 79 beneficiaries · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician avg: 128
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$24.46
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
James Williams, M.D. filed 406 Medicare Part D claims in 2023 as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Peoria, Illinois, prescribing 94% generic.
- 406
- Part D claims, 2023
- 94%
- generic prescribing
- $24.46
- industry payments (Sunshine Act)
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.
James Williams, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
406 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
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Board-eligible specialty (heuristic, not verified)
James Williams, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about James Williams, M.D.?
Quality data not reportedPrimary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Medicare Part D claims
406 217% vs specialty avg
Specialty distribution in Illinois
How Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician compares to other specialties among Illinois 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 Thoracic Surgery (Cardiothoracic Vascular 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).
James Williams, M.D. appears in the CMS NPPES registry as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider holding M.D. credentials at 2420 W NEBRASKA AVE, Peoria, IL, 61604, with a listed phone of (309) 680-5000. NPI 1265433882 was issued on 08/04/2005.
Medicare Part D records for calendar year 2023 show 406 prescription claims written by this provider, covering 79 Medicare beneficiaries and totaling roughly $25K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 13.5%.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician is a mid-sized specialty nationwide, with 5,070 enrolled providers across 52 states and an average of 128 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 | 1265433882 |
|---|---|
| Specialty | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/04/2005 |
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 James Williams, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$24
Largest payer
ABIOMED
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 - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to James Williams, M.D.. To verify James Williams, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
James Williams, M.D. - brand share 6.0%
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician average
6% brand-name claims vs 94% generic, on 406 2023 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 2023.
406
Total Claims
$25K
Total Drug Cost
79
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 774
- Total Day Supply
- 21,278
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $16K
- Generic Drug Cost
- $9K
- Opioid Claims
- 55 (13.5% rate)
- Antibiotic Claims
- 32
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 2.10
- Gender Split
- 49% female / 51% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What James Williams, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clopidogrel
Clopidogrel
151 claims
- Simvastatin 54
Simvastatin
54 claims
- Hydrocodone-Acetam… 28
Hydrocodone-Acetaminophen
28 claims
- Eliquis 19
Eliquis
19 claims
- Acetaminophen-Code… 15
Acetaminophen-Codeine
15 claims
- Cefadroxil 12
Cefadroxil
12 claims
| Drug | Claims |
|---|---|
| Clopidogrel Clopidogrel Bisulfate | 151 |
| Simvastatin | 54 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 28 |
| Eliquis Apixaban | 19 |
| Acetaminophen-Codeine Acetaminophen With Codeine | 15 |
| Cefadroxil | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in IL →
All providers in Illinois →
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Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Overview
How James Williams, M.D. fits within the Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician landscape nationally.
5,070
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in US
52
States with Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
128
Avg Claims per Provider
James Williams, M.D.'s 406 claims are above the specialty average of 128.
Nearby Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Williams.
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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Thoracic Surgery (Cardiothoracic Vascular 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 James Williams, M.D.'s specialty? ▼
James Williams, M.D. specializes in Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician and practices in Peoria, Illinois. Credentials: M.D..
How much does James Williams, M.D. prescribe under Medicare Part D? ▼
In 2023, James Williams, M.D. wrote 406 Medicare Part D claims totaling $25K in drug costs for 79 beneficiaries.
Where is James Williams, M.D. located? ▼
James Williams, M.D. is located at 2420 W NEBRASKA AVE, Peoria, IL, 61604. Phone: (309) 680-5000.
What is James Williams, M.D.'s NPI number? ▼
James Williams, M.D.'s National Provider Identifier (NPI) is 1265433882, issued on 08/04/2005.
Does James Williams, M.D. prescribe more brand-name or generic drugs? ▼
James Williams, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $16K in brand drug costs.
Does James Williams, M.D. prescribe opioids? ▼
Yes, James Williams, M.D. had 55 opioid claims in 2023 with an opioid prescribing rate of 13.5%.
How many Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers are there in the US? ▼
There are 5,070 Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers across 52 states in the US. The average Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider writes 128 Medicare Part D claims per year.
What drugs does James Williams, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, James Williams, M.D.'s most frequently prescribed drugs include Clopidogrel, Simvastatin, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Williams, M.D. accept Medicare? ▼
James Williams, M.D. appears in CMS Medicare data with 406 Part D claims and 79 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Williams, M.D.'s credentials? ▼
James Williams, M.D.'s NPI is 1265433882 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.