NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1154508539 PA
Verify on CMS → James Kager, PA
Physician Assistant in Williamsville, 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 150,974 in Physician Assistant, 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
845
Medicare Part D claims · 524 beneficiaries · Physician Assistant avg: 790
Generic prescribing
90%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
James Kager, PA filed 845 Medicare Part D claims in 2023 as a Physician Assistant in Williamsville, New York, prescribing 90% generic.
- 845
- Part D claims, 2023
- 90%
- generic prescribing
- ≥73rd
- 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.
CMS NPPES provider registry desk
NPI 1154508539 · Physician Assistant
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1154508539
- ENUM-MID 2008
- TAX-MEGA 151K Physician Assistant
- RX-LIGHT 845
- BOOK-MID 14,599 in New York
- PHOTO-ENUM Danielle O'Connell · 2008
James Kager, PA's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
845 ≥ 73rd percentile 73% of 1,370,886 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 · 2023
What does the federal data show about James Kager, PA?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
845 7% vs specialty avg
Specialty distribution in New York
How Physician Assistant 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 Physician Assistant. 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 | 1154508539 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA |
| Gender | Male |
| NPI Issued | 01/28/2008 |
Hospital and facility affiliations
Facilities where James Kager, PA 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.
According to CMS billing records, James Kager, PA is affiliated with 3 Medicare-billing facilities across 2 states.
Urgent Care Medical Associates, LLC
Brookfield, CT
Urgent Care Medical OF New York LLC
Baldwin Place, NY
Western New York Immediate Medical Care LLC
Buffalo, 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 James Kager, PA. To verify James Kager, PA'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 · Generic-heavy
James Kager, PA - brand share 8.0%
Physician Assistant average
8% brand-name claims vs 90% generic, on 845 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.
845
Total Claims
$45K
Total Drug Cost
524
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,232
- Total Day Supply
- 26,755
- Brand vs Generic
- 8% brand / 90% generic
- Brand Drug Cost
- $32K
- Generic Drug Cost
- $12K
- Antibiotic Claims
- 158
Patient Demographics
- Average Patient Age
- 70.0 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 65% female / 35% male
- Age Distribution
- <65: 101, 65-74: 239, 75-84: 142, 85+: 42
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What James Kager, PA prescribes most
Top Medicare Part D drugs by claim count, 2023
- Methylprednisolone
Methylprednisolone
70 claims
- Prednisone
Prednisone
60 claims
- Azithromycin
Azithromycin
44 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
28 claims
- Doxycycline Hyclate 23
Doxycycline Hyclate
23 claims
- Amlodipine Besylate 21
Amlodipine Besylate
21 claims
- Nitrofurantoin Mon… 21
Nitrofurantoin Mono-Macro
21 claims
- Atorvastatin Calcium 18
Atorvastatin Calcium
18 claims
| Drug | Claims |
|---|---|
| Methylprednisolone | 70 |
| Prednisone | 60 |
| Azithromycin | 44 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 28 |
| Doxycycline Hyclate | 23 |
| Amlodipine Besylate | 21 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 21 |
| Atorvastatin Calcium | 18 |
| Levothyroxine Sodium | 18 |
| Lisinopril | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How James Kager, PA fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
James Kager, PA's 845 claims are above the specialty average of 790.
Nationwide Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Kager, both outside New York so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physician Assistant Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Kager.
One of 14,599 Physician Assistant providers enrolled in New York, 5 are shown here.
Dr. Brynn Aakjar
P.A.
Yonkers, NY
Dr. Andrea Aaron
PA
Bronx, NY
Danielle Aarons
Smithtown, NY
John Abadeer
Brooklyn, NY
Dr. Zenebou Abalo-Toga
PA
New York, NY
Compare Physician Assistant nationally: see state-by-state distribution →
Frequently Asked Questions
What is James Kager, PA's specialty? ▼
James Kager, PA specializes in Physician Assistant and practices in Williamsville, New York. Credentials: PA.
How much does James Kager, PA prescribe under Medicare Part D? ▼
In 2023, James Kager, PA wrote 845 Medicare Part D claims totaling $45K in drug costs for 524 beneficiaries.
Where is James Kager, PA located? ▼
James Kager, PA is located at 7616 TRANSIT RD, Williamsville, NY, 14221. Phone: (716) 204-2273.
What is James Kager, PA's NPI number? ▼
James Kager, PA's National Provider Identifier (NPI) is 1154508539, issued on 01/28/2008.
Does James Kager, PA prescribe more brand-name or generic drugs? ▼
James Kager, PA's prescribing is 8% brand-name and 90% generic drugs by claim count, with $32K in brand drug costs.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does James Kager, PA prescribe most often? ▼
Based on 2023 Medicare Part D data, James Kager, PA's most frequently prescribed drugs include Methylprednisolone, Prednisone, Azithromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Kager, PA accept Medicare? ▼
James Kager, PA appears in CMS Medicare data with 845 Part D claims and 524 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Kager, PA's credentials? ▼
James Kager, PA's NPI is 1154508539 with credentials PA. 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.