NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1154365286 MD
Verify on CMS → Andrew Williams, MD
Internal Medicine Physician in Canton, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 174,792 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
5K
Medicare Part D claims · 354 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Andrew Williams, MD filed 5,444 Medicare Part D claims in 2024 as an Internal Medicine Physician in Canton, New York, prescribing 84% generic.
- 5K
- Part D claims, 2024
- 84%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥94th
- 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 Andrew Williams, MD
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 1154365286), first enumerated 06/16/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 5,444 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
New York statewide board action statistics are published annually — these figures describe aggregate state activity, not Andrew Williams, MD's individual license status. Verify directly with the state medical board.
Source: NYSBPMC 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 1154365286 · Internal Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1154365286
- ENUM-LEGACY 2006
- TAX-MEGA 175K Internal Medicine
- RX-MID 5,444
- BOOK-MID 13,725 in New York
- PHOTO-ENUM Wanda Ethen, MD · 2006
Andrew Williams, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
5,444 ≥ 94th percentile 94% 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
✓
Board certification likely (heuristic, not verified)
Andrew Williams, 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 Andrew Williams, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
5,444 95% vs specialty avg
Specialty distribution in New York
How Internal Medicine Physician compares to other specialties among New York 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).
Practice Address
Provider Details
| NPI | 1154365286 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/16/2006 |
Hospital and facility affiliations
Facilities where Andrew Williams, 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.
United Cerebral Palsy Association OF The North Country Inc
Canton, NY
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 - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Andrew Williams, MD. To verify Andrew Williams, MD's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Andrew Williams, MD - brand share 15.0%
Internal Medicine Physician average
15% brand-name claims vs 84% generic, on 5,444 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.
5,444
Total Claims
$846K
Total Drug Cost
354
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 11,298.633
- Total Day Supply
- 332,269
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $744K
- Generic Drug Cost
- $97K
- Opioid Claims
- 108 (2.0% rate)
- Antibiotic Claims
- 93
Patient Demographics
- Average Patient Age
- 69.5 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 49% female / 51% male
- Age Distribution
- <65: 91, 65-74: 137, 75-84: 87, 85+: 39
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Andrew Williams, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
225 claims
- Levothyroxine Sodium
Levothyroxine Sodium
225 claims
- Amlodipine Besylate
Amlodipine Besylate
201 claims
- Metoprolol Succinate
Metoprolol Succinate
195 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
185 claims
- Losartan Potassium
Losartan Potassium
173 claims
- Furosemide
Furosemide
168 claims
- Pantoprazole Sodium
Pantoprazole Sodium
158 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 225 |
| Levothyroxine Sodium | 225 |
| Amlodipine Besylate | 201 |
| Metoprolol Succinate | 195 |
| Rosuvastatin Calcium | 185 |
| Losartan Potassium | 173 |
| Furosemide | 168 |
| Pantoprazole Sodium | 158 |
| Lisinopril | 153 |
| Omeprazole | 147 |
* 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 Andrew Williams, MD fits within the Internal Medicine Physician landscape nationally.
174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider
Andrew Williams, MD's 5,444 claims are above the specialty average of 2,785.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Williams, both outside New York 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 Internal Medicine Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Williams.
One of 13,725 Internal Medicine Physician providers enrolled in New York, 5 are shown here.
Dr. Deborah Aanonsen
D.O.
Staten Island, NY
Dr. Nivedita Aanur
M.D.
New York, NY
Dr. Jay Aaron
MD
Great Neck, NY
Dr. Justin Aaron
MD
New York, NY
Ahmad Abadi
Poughkeepsie, NY
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Andrew Williams, MD's specialty? ▼
Andrew Williams, MD specializes in Internal Medicine Physician and practices in Canton, New York. Credentials: MD.
How much does Andrew Williams, MD prescribe under Medicare Part D? ▼
In 2024, Andrew Williams, MD wrote 5,444 Medicare Part D claims totaling $846K in drug costs for 354 beneficiaries.
Where is Andrew Williams, MD located? ▼
Andrew Williams, MD is located at 4 COMMERCE LANE, Canton, NY, 13617. Phone: (315) 386-8191.
What is Andrew Williams, MD's NPI number? ▼
Andrew Williams, MD's National Provider Identifier (NPI) is 1154365286, issued on 06/16/2006.
Does Andrew Williams, MD prescribe more brand-name or generic drugs? ▼
Andrew Williams, MD's prescribing is 15% brand-name and 84% generic drugs by claim count, with $744K in brand drug costs.
Does Andrew Williams, MD prescribe opioids? ▼
Yes, Andrew Williams, MD had 108 opioid claims in 2024 with an opioid prescribing rate of 2.0%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
What drugs does Andrew Williams, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Andrew Williams, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Andrew Williams, MD accept Medicare? ▼
Andrew Williams, MD appears in CMS Medicare data with 5,444 Part D claims and 354 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Andrew Williams, MD's credentials? ▼
Andrew Williams, MD's NPI is 1154365286 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 (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.