NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1356348007 MD, FACP
Verify on CMS → Anthony Williams, MD, FACP
Internal Medicine Physician in Barre, Vermont.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine 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
7K
Medicare Part D claims · 392 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Anthony Williams, MD, FACP filed 7,046 Medicare Part D claims in 2023 as a Internal Medicine Physician in Barre, Vermont, prescribing 87% generic.
- 7K
- Part D claims, 2023
- 87%
- generic prescribing
- 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.
Anthony Williams, MD, FACP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
7,046 Top 4% higher than 96% 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)
Anthony Williams, MD, FACP 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 Anthony Williams, MD, FACP?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
7,046 159% vs specialty avg
Specialty distribution in Vermont
How Internal Medicine Physician compares to other specialties among Vermont 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 Internal Medicine 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).
Anthony Williams, MD, FACP appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD, FACP credentials at 225 S MAIN ST, Barre, VT, 05641, with a listed phone of (802) 479-3302. NPI 1356348007 was issued on 07/07/2005.
Medicare Part D records for calendar year 2023 show 7,046 prescription claims written by this provider, covering 392 Medicare beneficiaries and totaling roughly $778K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 4.8%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1356348007 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD, FACP |
| Gender | Male |
| NPI Issued | 07/07/2005 |
Hospital and facility affiliations
Facilities where Anthony Williams, MD, FACP 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.
Central Vermont Medical Center Inc
Berlin, VT
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Anthony Williams, MD, FACP - brand share 13.0%
Internal Medicine Physician average
13% brand-name claims vs 87% generic, on 7,046 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.
7,046
Total Claims
$778K
Total Drug Cost
392
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,963
- Total Day Supply
- 358,819
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $627K
- Generic Drug Cost
- $148K
- Opioid Claims
- 338 (4.8% rate)
- Antibiotic Claims
- 126
Patient Demographics
- Average Patient Age
- 72.9 years
- Avg HCC Risk Score
- 1.25
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 57, 65-74: 143, 75-84: 141, 85+: 51
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Anthony Williams, MD, FACP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Metoprolol Succinate
Metoprolol Succinate
318 claims
- Atorvastatin Calcium
Atorvastatin Calcium
233 claims
- Omeprazole
Omeprazole
228 claims
- Simvastatin
Simvastatin
223 claims
- Hydrochlorothiazide
Hydrochlorothiazide
220 claims
- Lisinopril
Lisinopril
208 claims
- Amlodipine Besylate
Amlodipine Besylate
201 claims
- Losartan Potassium
Losartan Potassium
201 claims
| Drug | Claims |
|---|---|
| Metoprolol Succinate | 318 |
| Atorvastatin Calcium | 233 |
| Omeprazole | 228 |
| Simvastatin | 223 |
| Hydrochlorothiazide | 220 |
| Lisinopril | 208 |
| Amlodipine Besylate | 201 |
| Losartan Potassium | 201 |
| Metformin Hcl | 182 |
| Levothyroxine Sodium | 179 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Anthony Williams, MD, FACP fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Anthony Williams, MD, FACP's 7,046 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Vermont
Other clinicians with the same primary specialty enrolled in Vermont, drawn from the same CMS NPPES roster as Williams.
Dr. Jason Aaron
MD, MPH
White River Junction, VT
Usha Kiran Abbineni
Berlin, VT
Dr. Shubash Adhikari
M.D.
Burlington, VT
Varun Agrawal
South Burlington, VT
Dr. Jeffrey Ahearn
MD
Rutland, VT
Compare Internal Medicine 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 Vermont medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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 Anthony Williams, MD, FACP's specialty? ▼
Anthony Williams, MD, FACP specializes in Internal Medicine Physician and practices in Barre, Vermont. Credentials: MD, FACP.
How much does Anthony Williams, MD, FACP prescribe under Medicare Part D? ▼
In 2023, Anthony Williams, MD, FACP wrote 7,046 Medicare Part D claims totaling $778K in drug costs for 392 beneficiaries.
Where is Anthony Williams, MD, FACP located? ▼
Anthony Williams, MD, FACP is located at 225 S MAIN ST, Barre, VT, 05641. Phone: (802) 479-3302.
What is Anthony Williams, MD, FACP's NPI number? ▼
Anthony Williams, MD, FACP's National Provider Identifier (NPI) is 1356348007, issued on 07/07/2005.
Does Anthony Williams, MD, FACP prescribe more brand-name or generic drugs? ▼
Anthony Williams, MD, FACP's prescribing is 13% brand-name and 87% generic drugs by claim count, with $627K in brand drug costs.
Does Anthony Williams, MD, FACP prescribe opioids? ▼
Yes, Anthony Williams, MD, FACP had 338 opioid claims in 2023 with an opioid prescribing rate of 4.8%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Anthony Williams, MD, FACP prescribe most often? ▼
Based on 2023 Medicare Part D data, Anthony Williams, MD, FACP's most frequently prescribed drugs include Metoprolol Succinate, Atorvastatin Calcium, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Anthony Williams, MD, FACP accept Medicare? ▼
Anthony Williams, MD, FACP appears in CMS Medicare data with 7,046 Part D claims and 392 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Anthony Williams, MD, FACP's credentials? ▼
Anthony Williams, MD, FACP's NPI is 1356348007 with credentials MD, FACP. 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.
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.