NPI registry status
Active
2026 NPPES data Vascular Surgery Physician NPI 1639136443 MD
Verify on CMS → Margaret Schwarze, MD
Vascular Surgery Physician in Madison, 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 4,215 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
15
Medicare Part D claims · Vascular Surgery Physician avg: 205
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
Margaret Schwarze, MD filed 15 Medicare Part D claims in 2023 as a Vascular Surgery Physician in Madison, Wisconsin.
- 15
- Part D claims, 2023
- 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.
Margaret Schwarze, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
15 0th percentile higher than 0% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Margaret Schwarze, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Margaret Schwarze, MD?
Quality data not reportedPrimary specialty
Vascular Surgery Physician
Medicare Part D claims
15 93% vs specialty avg
Specialty distribution in Wisconsin
How Vascular Surgery Physician compares to other specialties among Wisconsin 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 Vascular Surgery Physician. 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).
Margaret Schwarze, MD appears in the CMS NPPES registry as a Vascular Surgery Physician provider holding MD credentials at 1 SOUTH PARK ST, Madison, WI, 53715, with a listed phone of (608) 287-2100. NPI 1639136443 was issued on 04/26/2006.
Medicare Part D records for calendar year 2023 show 15 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $774 in drug spend.
Vascular Surgery Physician is a narrow specialty nationwide, with 4,215 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 | 1639136443 |
|---|---|
| Specialty | Vascular Surgery Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/26/2006 |
Hospital and facility affiliations
Facilities where Margaret Schwarze, 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.
University OF Wisconsin Medical Foundation Inc
Madison, 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
15
Total Claims
$774
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 29
- Total Day Supply
- 783
- Brand Drug Cost
- $0
- Generic Drug Cost
- $774
Patient Demographics
- Average Patient Age
- 63.3 years
- Avg HCC Risk Score
- 1.35
Vascular Surgery Physician Overview
How Margaret Schwarze, MD fits within the Vascular Surgery Physician landscape nationally.
4,215
Vascular Surgery Physician Providers in US
53
States with Vascular Surgery Physician
205
Avg Claims per Provider
Margaret Schwarze, MD's 15 claims are below 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 Schwarze.
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.
Healthcare Guides
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How to Find a Doctor
Step-by-step guide to choosing a provider
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Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Wisconsin
Frequently Asked Questions
What is Margaret Schwarze, MD's specialty? ▼
Margaret Schwarze, MD specializes in Vascular Surgery Physician and practices in Madison, Wisconsin. Credentials: MD.
How much does Margaret Schwarze, MD prescribe under Medicare Part D? ▼
In 2023, Margaret Schwarze, MD wrote 15 Medicare Part D claims totaling $774 in drug costs for N/A beneficiaries.
Where is Margaret Schwarze, MD located? ▼
Margaret Schwarze, MD is located at 1 SOUTH PARK ST, Madison, WI, 53715. Phone: (608) 287-2100.
What is Margaret Schwarze, MD's NPI number? ▼
Margaret Schwarze, MD's National Provider Identifier (NPI) is 1639136443, issued on 04/26/2006.
How many Vascular Surgery Physician providers are there in the US? ▼
There are 4,215 Vascular Surgery Physician providers across 53 states in the US. The average Vascular Surgery Physician provider writes 205 Medicare Part D claims per year.
Does Margaret Schwarze, MD accept Medicare? ▼
Margaret Schwarze, MD appears in CMS Medicare data with 15 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Margaret Schwarze, MD's credentials? ▼
Margaret Schwarze, MD's NPI is 1639136443 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.
- 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.