NPI registry status
Active
2026 NPPES data Vascular Surgery Physician NPI 1962791632
Verify on CMS → Rishi Subbarayan
Vascular Surgery Physician in Appleton, 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 4,227 in Vascular Surgery 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
239
Medicare Part D claims · 86 beneficiaries · Vascular Surgery Physician avg: 205
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
94.6/100
▲ 12 pts above national avg 83.1 · Exceptional
Industry payments
$127.82
5 payments · CMS Open Payments (Sunshine Act)
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
Rishi Subbarayan reported a CMS MIPS final score of 94.6/100 - above the 83.1 national average - and filed 239 Medicare Part D claims in 2023.
- 94.6/100
- MIPS score · +12 vs avg
- 239
- Part D claims, 2023
- 95%
- 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.
Rishi Subbarayan's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
95 Top 25% higher than 75% 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 Rishi Subbarayan sits
This provider among vascular surgery physician peers
Across the 1,336 vascular surgery physician providers who report both Medicare Part D prescribing and a MIPS quality score, Rishi Subbarayan writes more Part D claims than 67% of them and scores higher on MIPS quality than 74% - 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 vascular surgery physician peer from a representative sample of 60; the gold marker is Rishi Subbarayan. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Rishi Subbarayan practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Rishi Subbarayan?
High performer (top quartile)Primary specialty
Vascular Surgery Physician
Medicare Part D claims
239 17% vs specialty avg
MIPS final score
94.6/100 11.5 pts vs avg
Specialty distribution in Wisconsin
How Vascular Surgery Physician compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Rishi Subbarayan's 2023 MIPS final score plotted against the Vascular Surgery Physician national average
- MIPS Final Score
- 94.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Vascular Surgery Physician) - 94.6/100 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).
Rishi Subbarayan appears in the CMS NPPES registry as a Vascular Surgery Physician provider at 2000 E MILESTONE DR, Appleton, WI, 54913, with a listed phone of (920) 731-8131. NPI 1962791632 was issued on 04/04/2011.
Medicare Part D records for calendar year 2023 show 239 prescription claims written by this provider, covering 86 Medicare beneficiaries and totaling roughly $22K in drug spend, split 5% brand-name and 95% generic by claim count, with an opioid prescribing rate of 5.0%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 94.6/100 for the 2023 performance year (Quality 85.2), compared with the national average of 83.1.
Vascular Surgery Physician is a narrow specialty nationwide, with 4,227 enrolled providers across 53 states and an average of 205 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 | 1962791632 |
|---|---|
| Specialty | Vascular Surgery Physician |
| Gender | Male |
| NPI Issued | 04/04/2011 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
94.6154
Final Score
Avg: 83.1
85.1795
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Rishi Subbarayan 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.
Fox Valley Surgical Associates Ltd
Appleton, WI
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 Rishi Subbarayan. Source: openpaymentsdata.cms.gov.
Total received
$128
Largest payer
Smith+Nephew, 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.
Brand vs generic prescribing mix · Generic-heavy
Rishi Subbarayan - brand share 5.0%
Vascular Surgery Physician average
5% brand-name claims vs 95% generic, on 239 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.
239
Total Claims
$22K
Total Drug Cost
86
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 466
- Total Day Supply
- 13,425
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $16K
- Generic Drug Cost
- $6K
- Opioid Claims
- 12 (5.0% rate)
Patient Demographics
- Average Patient Age
- 74.0 years
- Avg HCC Risk Score
- 2.11
- Gender Split
- 42% female / 58% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Rishi Subbarayan prescribes most
Top Medicare Part D drugs by claim count, 2023
- Cilostazol
Cilostazol
76 claims
- Clopidogrel
Clopidogrel
63 claims
- Rosuvastatin Calcium 23
Rosuvastatin Calcium
23 claims
- Atorvastatin Calcium 13
Atorvastatin Calcium
13 claims
- Gabapentin 11
Gabapentin
11 claims
| Drug | Claims |
|---|---|
| Cilostazol | 76 |
| Clopidogrel Clopidogrel Bisulfate | 63 |
| Rosuvastatin Calcium | 23 |
| Atorvastatin Calcium | 13 |
| Gabapentin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Vascular Surgery Physician Overview
How Rishi Subbarayan fits within the Vascular Surgery Physician landscape nationally.
4,227
Vascular Surgery Physician Providers in US
53
States with Vascular Surgery Physician
205
Avg Claims per Provider
Rishi Subbarayan's 239 claims are above the specialty average of 205.
Nearby Vascular Surgery Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Subbarayan.
Dr. Charles Acher
MD
Madison, WI
Dr. Khosro Adib
MD
Madison, WI
Dr. Ayman Ahmed
MD
Marshfield, WI
Dr. Natasha Ahuja
MD
Green Bay, WI
Dr. Javariah Asghar
M.D.
Marshfield, WI
Compare Vascular Surgery 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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Vascular Surgery 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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Medical Specialties Explained
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Rishi Subbarayan's specialty? ▼
Rishi Subbarayan specializes in Vascular Surgery Physician and practices in Appleton, Wisconsin.
How much does Rishi Subbarayan prescribe under Medicare Part D? ▼
In 2023, Rishi Subbarayan wrote 239 Medicare Part D claims totaling $22K in drug costs for 86 beneficiaries.
What is Rishi Subbarayan's Medicare quality score? ▼
Rishi Subbarayan has a CMS MIPS Final Score of 94.6/100 (Quality: 85.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Rishi Subbarayan located? ▼
Rishi Subbarayan is located at 2000 E MILESTONE DR, Appleton, WI, 54913. Phone: (920) 731-8131.
What is Rishi Subbarayan's NPI number? ▼
Rishi Subbarayan's National Provider Identifier (NPI) is 1962791632, issued on 04/04/2011.
Does Rishi Subbarayan prescribe more brand-name or generic drugs? ▼
Rishi Subbarayan's prescribing is 5% brand-name and 95% generic drugs by claim count, with $16K in brand drug costs.
Does Rishi Subbarayan prescribe opioids? ▼
Yes, Rishi Subbarayan had 12 opioid claims in 2023 with an opioid prescribing rate of 5.0%.
How many Vascular Surgery Physician providers are there in the US? ▼
There are 4,227 Vascular Surgery Physician providers across 53 states in the US. The average Vascular Surgery Physician provider writes 205 Medicare Part D claims per year.
What drugs does Rishi Subbarayan prescribe most often? ▼
Based on 2023 Medicare Part D data, Rishi Subbarayan's most frequently prescribed drugs include Cilostazol, Clopidogrel, Rosuvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Rishi Subbarayan accept Medicare? ▼
Rishi Subbarayan appears in CMS Medicare data with 239 Part D claims and 86 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Rishi Subbarayan's credentials? ▼
Rishi Subbarayan's NPI is 1962791632. 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.