NPI registry status
Active
2026 NPPES data Radiation Oncology Physician NPI 1457693079 MD
Verify on CMS → Eric Xanthopoulos, MD
Radiation Oncology Physician in Beloit, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,141 in Radiation Oncology 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
687
Medicare Part D claims · 173 beneficiaries · Radiation Oncology Physician avg: 135
MIPS score
73.1/100
▼ 10 pts below national avg 83.5 · Mid-tier
Industry payments
$266.97
15 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Eric Xanthopoulos, MD reported a CMS MIPS final score of 73.1/100 - below the 83.5 national average - and filed 687 Medicare Part D claims in 2024.
- 73.1/100
- MIPS score · -10 vs avg
- 687
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥11th
- pct among measured MIPS (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 Eric Xanthopoulos, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1457693079), first enumerated 03/21/2013.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 687 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 73.1/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- 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
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$266.97 in reported industry payments (15 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1457693079 · Radiation Oncology Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-LOW · RX-LIGHT · BOOK-THIN · PHOTO-FINISH
- NPI-10 1457693079
- ENUM-MID 2013
- TAX-MID 6K Radiation Oncology
- MIPS-LOW 73.1/100
- RX-LIGHT 687
- BOOK-THIN 139 in Wisconsin
- PHOTO-FINISH Curtis Studey, MD · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Kathy Baglan, M.…
Kathy Baglan, M.D.
73 MIPS pts
- Julie Mai, M.D. …
Julie Mai, M.D.
73 MIPS pts
- Xanthopoulos · t…
Xanthopoulos · this provider
73.1 MIPS pts
- Curtis Studey, M…
Curtis Studey, MD
73.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Eric Xanthopoulos, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
73 ≥ 11th percentile 11% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Eric Xanthopoulos, MD sits
This provider among radiation oncology physician peers
Across the 1,834 radiation oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Eric Xanthopoulos, MD writes more Part D claims than 99% of them and scores higher on MIPS quality than 8% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one radiation oncology physician peer from a representative sample of 60; the gold marker is Eric Xanthopoulos, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Eric Xanthopoulos, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Eric Xanthopoulos, MD?
Below national averagePrimary specialty
Radiation Oncology Physician
Medicare Part D claims
687 5× vs specialty avg
MIPS final score
73.1/100 10.4 pts vs avg
Specialty distribution in Wisconsin
How Radiation Oncology Physician compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Eric Xanthopoulos, MD's 2023 MIPS final score plotted against the Radiation Oncology Physician national average
- MIPS Final Score
- 73.1/100
- vs 83.5 national avg · 2023 performance year
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 | 1457693079 |
|---|---|
| Specialty | Radiation Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/21/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
73.0554
Final Score
Measured-score avg: 83.5
58.7956
Quality
51.3891
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Eric Xanthopoulos, 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.
Beloit Health System Inc
Beloit, WI
Swedishamerican Hospital
Rockford, 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 Eric Xanthopoulos, MD. Source: openpaymentsdata.cms.gov.
Total received
$267
Largest payer
Janssen Biotech, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
687
Total Claims
$17K
Total Drug Cost
173
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 804.333
- Total Day Supply
- 18,593
- Generic Drug Cost
- $13K
- Opioid Claims
- 86 (12.5% rate)
- Antibiotic Claims
- 25
Patient Demographics
- Average Patient Age
- 77.4 years
- Avg HCC Risk Score
- 2.07
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 14, 65-74: 57, 75-84: 57, 85+: 45
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Eric Xanthopoulos, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Tamsulosin Hcl
Tamsulosin Hcl
51 claims
- Oxycodone Hcl
Oxycodone Hcl
40 claims
- Levothyroxine Sodium
Levothyroxine Sodium
35 claims
- Lidocaine Hcl Visc… 19
Lidocaine Hcl Viscous
19 claims
- Omeprazole 19
Omeprazole
19 claims
- Oxybutynin Chlorid… 19
Oxybutynin Chloride Er
19 claims
- Gabapentin 18
Gabapentin
18 claims
- Lorazepam 18
Lorazepam
18 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 51 |
| Oxycodone Hcl | 40 |
| Levothyroxine Sodium | 35 |
| Lidocaine Hcl Viscous Lidocaine Hcl | 19 |
| Omeprazole | 19 |
| Oxybutynin Chloride Er Oxybutynin Chloride | 19 |
| Gabapentin | 18 |
| Lorazepam | 18 |
| Furosemide | 16 |
| Sertraline Hcl | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Radiation Oncology Physician Overview
How Eric Xanthopoulos, MD fits within the Radiation Oncology Physician landscape nationally.
6,141
Radiation Oncology Physician Providers in US
53
States with Radiation Oncology Physician
135
Avg Claims per Provider
Eric Xanthopoulos, MD's 687 claims are above the specialty average of 135.
Nationwide Radiation Oncology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Xanthopoulos, both outside Wisconsin so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (73.1 here).
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Radiation Oncology Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Xanthopoulos.
One of 139 Radiation Oncology Physician providers enrolled in Wisconsin, 5 are shown here.
Dr. Now Bahar Alam
MD
Eau Claire, WI
Dr. Bethany Anderson
M.D.
Madison, WI
Dr. Richard Auchter
MD
Madison, WI
Dr. Musaddiq Awan
M.D.
Milwaukee, WI
Dr. James Baer
MD
Eau Claire, WI
Compare Radiation Oncology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Eric Xanthopoulos, MD's specialty? ▼
Eric Xanthopoulos, MD specializes in Radiation Oncology Physician and practices in Beloit, Wisconsin. Credentials: MD.
How much does Eric Xanthopoulos, MD prescribe under Medicare Part D? ▼
In 2024, Eric Xanthopoulos, MD wrote 687 Medicare Part D claims totaling $17K in drug costs for 173 beneficiaries.
What is Eric Xanthopoulos, MD's Medicare quality score? ▼
Eric Xanthopoulos, MD has a CMS MIPS Final Score of 73.1/100 (Quality: 58.8, Cost: 51.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Eric Xanthopoulos, MD located? ▼
Eric Xanthopoulos, MD is located at BELOIT HEALTH SYSTEM UW CANCER CENTER, Beloit, WI, 53511. Phone: (608) 364-5253.
What is Eric Xanthopoulos, MD's NPI number? ▼
Eric Xanthopoulos, MD's National Provider Identifier (NPI) is 1457693079, issued on 03/21/2013.
Does Eric Xanthopoulos, MD prescribe opioids? ▼
Yes, Eric Xanthopoulos, MD had 86 opioid claims in 2024 with an opioid prescribing rate of 12.5%.
How many Radiation Oncology Physician providers are there in the US? ▼
There are 6,141 Radiation Oncology Physician providers across 53 states in the US. The average Radiation Oncology Physician provider writes 135 Medicare Part D claims per year.
What drugs does Eric Xanthopoulos, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Eric Xanthopoulos, MD's most frequently prescribed drugs include Tamsulosin Hcl, Oxycodone Hcl, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Eric Xanthopoulos, MD accept Medicare? ▼
Eric Xanthopoulos, MD appears in CMS Medicare data with 687 Part D claims and 173 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Eric Xanthopoulos, MD's credentials? ▼
Eric Xanthopoulos, MD's NPI is 1457693079 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.
- 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 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.