NPI registry status
Active
2026 NPPES data Orthopaedic Hand Surgery Physician NPI 1104881895 DO MS
Verify on CMS → Stefan Zachary, DO MS
Orthopaedic Hand 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 1,962 in Orthopaedic Hand 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
76
Medicare Part D claims · 51 beneficiaries · Orthopaedic Hand Surgery Physician avg: 180
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Stefan Zachary, DO MS filed 76 Medicare Part D claims in 2023 as a Orthopaedic Hand Surgery Physician in Madison, Wisconsin.
- 76
- Part D claims, 2023
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.
Stefan Zachary, DO MS's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
76 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-eligible specialty (heuristic, not verified)
Stefan Zachary, DO MS practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Stefan Zachary, DO MS?
Quality data not reportedPrimary specialty
Orthopaedic Hand Surgery Physician
Medicare Part D claims
76 58% vs specialty avg
Specialty distribution in Wisconsin
How Orthopaedic Hand 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 Orthopaedic Hand 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).
Stefan Zachary, DO MS appears in the CMS NPPES registry as a Orthopaedic Hand Surgery Physician provider holding DO MS credentials at WILLIAM S MIDDLETON MEMORIAL VETERANS HOSPITAL, Madison, WI, 53705, with a listed phone of (608) 770-8886. NPI 1104881895 was issued on 04/18/2006.
Medicare Part D records for calendar year 2023 show 76 prescription claims written by this provider, covering 51 Medicare beneficiaries and totaling roughly $809 in drug spend, with an opioid prescribing rate of 15.8%.
Orthopaedic Hand Surgery Physician is a narrow specialty nationwide, with 1,962 enrolled providers across 52 states and an average of 180 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 | 1104881895 |
|---|---|
| Specialty | Orthopaedic Hand Surgery Physician |
| Credentials | DO MS |
| Gender | Male |
| NPI Issued | 04/18/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
76
Total Claims
$809
Total Drug Cost
51
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 79
- Total Day Supply
- 1,078
- Generic Drug Cost
- $808
- Opioid Claims
- 12 (15.8% rate)
Patient Demographics
- Average Patient Age
- 68.5 years
- Avg HCC Risk Score
- 0.96
- Gender Split
- 67% female / 33% male
- Age Distribution
- <65: 13, 65-74: 27, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Methylprednisolone | 32 |
| Nabumetone | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Orthopaedic Hand Surgery Physician Overview
How Stefan Zachary, DO MS fits within the Orthopaedic Hand Surgery Physician landscape nationally.
1,962
Orthopaedic Hand Surgery Physician Providers in US
52
States with Orthopaedic Hand Surgery Physician
180
Avg Claims per Provider
Stefan Zachary, DO MS's 76 claims are below the specialty average of 180.
Nearby Orthopaedic Hand Surgery Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Zachary.
Dr. Dennis Andersen
M.D.
Franklin, WI
Dr. David Clark
MD
Franklin, WI
Dr. Harlan Edelman
MD
Janesville, WI
Dr. Bradley Fideler
MD
Lake Geneva, WI
Dr. Thomas France
MD
Appleton, WI
Compare Orthopaedic Hand 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 Orthopaedic Hand 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
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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 Stefan Zachary, DO MS's specialty? ▼
Stefan Zachary, DO MS specializes in Orthopaedic Hand Surgery Physician and practices in Madison, Wisconsin. Credentials: DO MS.
How much does Stefan Zachary, DO MS prescribe under Medicare Part D? ▼
In 2023, Stefan Zachary, DO MS wrote 76 Medicare Part D claims totaling $809 in drug costs for 51 beneficiaries.
Where is Stefan Zachary, DO MS located? ▼
Stefan Zachary, DO MS is located at WILLIAM S MIDDLETON MEMORIAL VETERANS HOSPITAL, Madison, WI, 53705. Phone: (608) 770-8886.
What is Stefan Zachary, DO MS's NPI number? ▼
Stefan Zachary, DO MS's National Provider Identifier (NPI) is 1104881895, issued on 04/18/2006.
Does Stefan Zachary, DO MS prescribe opioids? ▼
Yes, Stefan Zachary, DO MS had 12 opioid claims in 2023 with an opioid prescribing rate of 15.8%.
How many Orthopaedic Hand Surgery Physician providers are there in the US? ▼
There are 1,962 Orthopaedic Hand Surgery Physician providers across 52 states in the US. The average Orthopaedic Hand Surgery Physician provider writes 180 Medicare Part D claims per year.
What drugs does Stefan Zachary, DO MS prescribe most often? ▼
Based on 2023 Medicare Part D data, Stefan Zachary, DO MS's most frequently prescribed drugs include Methylprednisolone, Nabumetone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stefan Zachary, DO MS accept Medicare? ▼
Stefan Zachary, DO MS appears in CMS Medicare data with 76 Part D claims and 51 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stefan Zachary, DO MS's credentials? ▼
Stefan Zachary, DO MS's NPI is 1104881895 with credentials DO MS. 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.