NPI registry status
Active
2026 NPPES data General Practice Physician NPI 1871681353 MD
Verify on CMS → William Kerr, MD
General Practice Physician in Wainscott, 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 16,725 in General Practice 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 · 545 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
86%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
98.5/100
▲ 15 pts above national avg 83.1 · Exceptional
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
William Kerr, MD reported a CMS MIPS final score of 98.5/100 - above the 83.1 national average - and filed 4,735 Medicare Part D claims in 2023.
- 98.5/100
- MIPS score · +15 vs avg
- 5K
- Part D claims, 2023
- 86%
- 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.
William Kerr, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
99 Top 11% higher than 89% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where William Kerr, MD sits
This provider among general practice physician peers
Across the 783 general practice physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Kerr, MD writes more Part D claims than 76% of them and scores higher on MIPS quality than 91% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one general practice physician peer from a representative sample of 60; the gold marker is William Kerr, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Kerr, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 William Kerr, MD?
High performer (top quartile)Primary specialty
General Practice Physician
Medicare Part D claims
4,735 65% vs specialty avg
MIPS final score
98.5/100 15.4 pts vs avg
Specialty distribution in New York
How General Practice Physician compares to other specialties among New York providers
Medicare quality performance, MIPS
William Kerr, MD's 2023 MIPS final score plotted against the General Practice Physician national average
- MIPS Final Score
- 98.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (General Practice Physician) - 98.5/100 vs national avg 83.1
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).
William Kerr, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at 83 WAINSCOTT NORTHWEST RD, Wainscott, NY, 11975, with a listed phone of (631) 537-1892. NPI 1871681353 was issued on 10/10/2006.
Medicare Part D records for calendar year 2023 show 4,735 prescription claims written by this provider, covering 545 Medicare beneficiaries and totaling roughly $492K in drug spend, split 13% brand-name and 86% generic by claim count, with an opioid prescribing rate of 2.5%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 98.5/100 for the 2023 performance year (Quality 82.9), compared with the national average of 83.1.
General Practice Physician is a mid-sized specialty nationwide, with 16,725 enrolled providers across 56 states and an average of 2,872 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 | 1871681353 |
|---|---|
| Specialty | General Practice Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/10/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
98.5241
Final Score
Avg: 83.1
82.8545
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
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 William Kerr, MD. To verify William Kerr, 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
William Kerr, MD - brand share 13.0%
General Practice Physician average
13% brand-name claims vs 86% generic, on 4,735 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.
4,735
Total Claims
$492K
Total Drug Cost
545
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,921
- Total Day Supply
- 252,757
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $406K
- Generic Drug Cost
- $85K
- Opioid Claims
- 118 (2.5% rate)
- Antibiotic Claims
- 311
Patient Demographics
- Average Patient Age
- 76.2 years
- Avg HCC Risk Score
- 0.90
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 18, 65-74: 227, 75-84: 204, 85+: 96
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Kerr, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
301 claims
- Levothyroxine Sodium
Levothyroxine Sodium
274 claims
- Amlodipine Besylate
Amlodipine Besylate
171 claims
- Doxycycline Hyclate
Doxycycline Hyclate
142 claims
- Zolpidem Tartrate
Zolpidem Tartrate
134 claims
- Trazodone Hcl 117
Trazodone Hcl
117 claims
- Lisinopril 108
Lisinopril
108 claims
- Meloxicam 98
Meloxicam
98 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 301 |
| Levothyroxine Sodium | 274 |
| Amlodipine Besylate | 171 |
| Doxycycline Hyclate | 142 |
| Zolpidem Tartrate | 134 |
| Trazodone Hcl | 117 |
| Lisinopril | 108 |
| Meloxicam | 98 |
| Rosuvastatin Calcium | 97 |
| Metoprolol Succinate | 95 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
General Practice Physician Overview
How William Kerr, MD fits within the General Practice Physician landscape nationally.
16,725
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider
William Kerr, MD's 4,735 claims are above the specialty average of 2,872.
Nearby General Practice Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Kerr.
Dr. Brian Abrahams
M.D.
New York, NY
Dr. Sameh Abuelkhir
MD
Brooklyn, NY
Dr. Billy Abungu
MD
Bronx, NY
Dr. Elizabeth Acevedo-Danzi
D.O.
East Meadow, NY
Dr. Reagan Achinefu
MD
Bronx, NY
Compare General Practice 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 New York medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby General Practice 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 William Kerr, MD's specialty? ▼
William Kerr, MD specializes in General Practice Physician and practices in Wainscott, New York. Credentials: MD.
How much does William Kerr, MD prescribe under Medicare Part D? ▼
In 2023, William Kerr, MD wrote 4,735 Medicare Part D claims totaling $492K in drug costs for 545 beneficiaries.
What is William Kerr, MD's Medicare quality score? ▼
William Kerr, MD has a CMS MIPS Final Score of 98.5/100 (Quality: 82.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Kerr, MD located? ▼
William Kerr, MD is located at 83 WAINSCOTT NORTHWEST RD, Wainscott, NY, 11975. Phone: (631) 537-1892.
What is William Kerr, MD's NPI number? ▼
William Kerr, MD's National Provider Identifier (NPI) is 1871681353, issued on 10/10/2006.
Does William Kerr, MD prescribe more brand-name or generic drugs? ▼
William Kerr, MD's prescribing is 13% brand-name and 86% generic drugs by claim count, with $406K in brand drug costs.
Does William Kerr, MD prescribe opioids? ▼
Yes, William Kerr, MD had 118 opioid claims in 2023 with an opioid prescribing rate of 2.5%.
How many General Practice Physician providers are there in the US? ▼
There are 16,725 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does William Kerr, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Kerr, 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 William Kerr, MD accept Medicare? ▼
William Kerr, MD appears in CMS Medicare data with 4,735 Part D claims and 545 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Kerr, MD's credentials? ▼
William Kerr, MD's NPI is 1871681353 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.