NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1427694124
Verify on CMS → Adam Koss
Physician Assistant in Buffalo Grove, 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 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
233
Medicare Part D claims · 106 beneficiaries · Physician Assistant avg: 790
MIPS score
72.7/100
▼ 10 pts below national avg 83.1 · Mid-tier
Industry payments
$141.94
7 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Adam Koss reported a CMS MIPS final score of 72.7/100 - below the 83.1 national average - and filed 233 Medicare Part D claims in 2023.
- 72.7/100
- MIPS score · -10 vs avg
- 233
- Part D claims, 2023
- $141.94
- 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.
Adam Koss's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
73 10th percentile higher than 10% 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 Adam Koss sits
This provider among physician assistant peers
Across the 27,054 physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Adam Koss writes more Part D claims than 49% of them and scores higher on MIPS quality than 8% - placing this provider in the lower-volume, lower-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 physician assistant peer from a representative sample of 60; the gold marker is Adam Koss. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Adam Koss?
Below national averagePrimary specialty
Physician Assistant
Medicare Part D claims
233 71% vs specialty avg
MIPS final score
72.7/100 10.4 pts vs avg
Specialty distribution in Illinois
How Physician Assistant compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Adam Koss's 2023 MIPS final score plotted against the Physician Assistant national average
- MIPS Final Score
- 72.7/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Physician Assistant) - 72.7/100 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).
Adam Koss appears in the CMS NPPES registry as a Physician Assistant provider at 2948 WHISPERING OAKS DR, Buffalo Grove, IL, 60089, with a listed phone of (630) 404-1477. NPI 1427694124 was issued on 11/18/2019.
Medicare Part D records for calendar year 2023 show 233 prescription claims written by this provider, covering 106 Medicare beneficiaries and totaling roughly $2K in drug spend, with an opioid prescribing rate of 43.3%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 72.7/100 for the 2023 performance year (Quality 71.8, Cost 53), compared with the national average of 83.1.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1427694124 |
|---|---|
| Specialty | Physician Assistant |
| Gender | Male |
| NPI Issued | 11/18/2019 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
72.6842
Final Score
Avg: 83.1
71.8158
Quality
52.965
Cost
81
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Adam Koss 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.
Illinois Bone And Joint Institute, LLC
Bannockburn, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Adam Koss. Source: openpaymentsdata.cms.gov.
Total received
$142
Largest payer
DePuy Synthes Sales Inc.
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 Adam Koss. To verify Adam Koss'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
233
Total Claims
$2K
Total Drug Cost
106
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 233
- Total Day Supply
- 1,393
- Brand Drug Cost
- $0
- Generic Drug Cost
- $2K
- Opioid Claims
- 101 (43.3% rate)
- Antibiotic Claims
- 63
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 0.91
- Gender Split
- 58% female / 42% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Adam Koss prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
61 claims
- Cephalexin
Cephalexin
45 claims
- Ondansetron Hcl
Ondansetron Hcl
33 claims
- Tramadol Hcl 15
Tramadol Hcl
15 claims
- Oxycodone Hcl 12
Oxycodone Hcl
12 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 61 |
| Cephalexin | 45 |
| Ondansetron Hcl | 33 |
| Tramadol Hcl | 15 |
| Oxycodone Hcl | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Adam Koss fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Adam Koss's 233 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Koss.
Dr. Brooke Aarhus
PA-C
Park Ridge, IL
Dr. Traci Aaron
PA-C
Chicago, IL
Dr. Sana Abbasi
PA
Carol Stream, IL
Dr. Susan Abbinanti
PA-C
Elk Grove Village, IL
Dr. Katheryn Abbott
PA
Schaumburg, IL
Compare Physician Assistant 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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physician Assistant 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 Adam Koss's specialty? ▼
Adam Koss specializes in Physician Assistant and practices in Buffalo Grove, Illinois.
How much does Adam Koss prescribe under Medicare Part D? ▼
In 2023, Adam Koss wrote 233 Medicare Part D claims totaling $2K in drug costs for 106 beneficiaries.
What is Adam Koss's Medicare quality score? ▼
Adam Koss has a CMS MIPS Final Score of 72.7/100 (Quality: 71.8, Cost: 53). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Adam Koss located? ▼
Adam Koss is located at 2948 WHISPERING OAKS DR, Buffalo Grove, IL, 60089. Phone: (630) 404-1477.
What is Adam Koss's NPI number? ▼
Adam Koss's National Provider Identifier (NPI) is 1427694124, issued on 11/18/2019.
Does Adam Koss prescribe opioids? ▼
Yes, Adam Koss had 101 opioid claims in 2023 with an opioid prescribing rate of 43.3%.
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 Adam Koss prescribe most often? ▼
Based on 2023 Medicare Part D data, Adam Koss's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Cephalexin, Ondansetron Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Adam Koss accept Medicare? ▼
Adam Koss appears in CMS Medicare data with 233 Part D claims and 106 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Adam Koss's credentials? ▼
Adam Koss's NPI is 1427694124. 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
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.