Dr. Stefan V. Zachary, DO, MS
- Medicare services, 2024
- 1,282
- Medicare patients, 2024
- 149
- Part D claims, 2024
- 45
- MIPS score, 2024
- 83
- Hospital affiliations
- 1
- Practice address
- 600 Highland Ave, Madison, WI 53792
- Practice phone
- Call (800) 323-8942
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UW Health University Hospital
Madison, Wisconsin
Find Dr. Zachary's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Stefan V. Zachary is an orthopaedic hand surgery physician in Madison, Wisconsin
Dr. Zachary practices at UW Health University Hospital in Madison, Wisconsin.
Dr. Zachary's NPI, 1104881895, was assigned on April 18, 2006. Dr. Zachary graduated from Ohio University, College of Osteopathic Medicine in 1989. Dr. Zachary holds Wisconsin license 37389-21.
- NPI
- 1104881895NPI Registry (opens in a new tab)
- NPI enumeration date
- April 18, 2006
- NPI status
- Active
- Practice phone
- (800) 323-8942
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Stefan V. Zachary practices at UW Health University Hospital in Madison, Wisconsin
Dr. Zachary's primary practice is UW Health University Hospital, at 600 Highland Ave, Madison, WI 53792 in Dane County. The practice phone is (800) 323-8942.
- UW Health University Hospital600 Highland Ave, Madison, WI 53792 · Dane CountyPhone(800) 323-8942
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stefan V. Zachary is affiliated with 2 sites of care and 1 medical group
Dr. Zachary's primary practice is UW Health University Hospital in Madison, Wisconsin. Dr. Zachary is also affiliated with University Hospital. The medical group on file is UW Health.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stefan V. Zachary's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zachary practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UW Health University Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stefan V. Zachary is one of 44 orthopaedic hand surgery physicians in Wisconsin
Hand surgery is Dr. Zachary's primary specialty in the NPI Registry, under taxonomy code 207XS0106X. Dr. Zachary is licensed in Wisconsin.
Specialties and state licenses
- Orthopaedic hand surgery, WisconsinPrimary
Orthopaedic hand surgery physicians near Dr. Zachary
Counts of orthopaedic hand surgery physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Stefan V. Zachary billed Medicare for 1,282 services in 2024
CMS data shows 1,282 Medicare services from Dr. Zachary across 11 procedure codes in 2024, for 149 Medicare patients. Medicare paid $75,682 for them.
Dr. Zachary's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1142024: 1,097862%
- Surgery
- 2023: 1562024: 10135%
- Office and hospital visits
- 2023: 2162024: 8461%
Where Dr. Zachary's Medicare services took place, 2024
- In an office1,23196%
- In a facility514%
Dr. Zachary compared with the Wisconsin median for orthopaedic hand surgery physicians, 2024
- Dr. Zachary
- Wisconsin median
- Medicare services
- 1,282vs 5032.5 times
- Medicare patients
- 149vs 17213% below
- Part D claims
- 14vs 4871% below
Medians across 44 orthopaedic hand surgery physicians in Wisconsin with Dmand AI profiles that report each measure.
Dr. Zachary's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Zachary?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zachary and other orthopaedic hand surgery physicians in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stefan V. Zachary treated 149 Medicare patients in 2024, average age 74
CMS counts 149 Medicare patients who saw Dr. Zachary in 2024. The largest group is 65 to 74, with 80 patients. 66% of them have high cholesterol, and 62% have high blood pressure. 9% are also on Medicaid. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zachary's median patient age at 60, with 40% women.
Dr. Zachary's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Zachary's Medicare patients by sex, 2024
- Women8658%
- Men6342%
Chronic conditions among Dr. Zachary's Medicare patients, 2024
- High cholesterol66%
- High blood pressure62%
- Arthritis57%
- Anxiety25%
- Mood disorders23%
- Diabetes21%
- Depression20%
- Chronic kidney disease18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zachary's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women40%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stefan V. Zachary wrote 45 Medicare Part D claims in 2024
In 2024, Dr. Zachary wrote 45 Medicare Part D claims for 29 patients. 100% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $114 in total drug cost. In 2023, CMS named 46 claims across 2 drugs.
Dr. Zachary's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 462024: 1470%
Drugs named by CMS: 1 in 2024, 2 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Stefan V. Zachary scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Zachary for performance year 2024, reported as part of a group.
Dr. Zachary's MIPS scores, performance year 2024
- 83of 100Final score
- 87.8of 100Quality
- 77of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Stefan V. Zachary received $811 in industry payments from 2017 to 2025
CMS Open Payments shows 4 general payments to Dr. Zachary from 4 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 53% of the total. Great Lakes Orthopedics paid the most, $379.
General payments to Dr. Zachary by program year, 2017 to 2025
General payments to Dr. Zachary by kind, 2017 to 2025
- Food and beverage$43253%
- Education$37947%
Companies that paid Dr. Zachary the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stefan V. Zachary graduated from Ohio University, College of Osteopathic Medicine
Dr. Zachary graduated from Ohio University, College of Osteopathic Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stefan V. Zachary's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Stefan V. Zachary
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Stefan V. Zachary's NPI number?
Dr. Stefan V. Zachary's NPI number is 1104881895. It was assigned on April 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stefan V. Zachary?
Dr. Stefan V. Zachary is an orthopaedic hand surgery physician in Madison, Wisconsin. The primary specialty in the NPI Registry is Orthopaedic Hand Surgery Physician (taxonomy code 207XS0106X).
Where does Dr. Stefan V. Zachary practice?
Dr. Zachary practices at 600 Highland Ave, Madison, WI 53792. Dr. Zachary's primary practice is UW Health University Hospital in Madison, Wisconsin.
What is Dr. Stefan V. Zachary's office phone number?
The practice phone on file for Dr. Zachary is (800) 323-8942.
What is Dr. Stefan V. Zachary's medical license number?
Dr. Zachary holds Wisconsin license 37389-21.
Which hospitals is Dr. Stefan V. Zachary affiliated with?
Dr. Zachary is affiliated with University Hospital.
What medical group is Dr. Stefan V. Zachary part of?
Dr. Zachary is linked to UW Health.
Does Dr. Stefan V. Zachary accept Medicare?
Yes. CMS data shows Dr. Zachary billed Medicare for 1,282 services in 2024.
What is Dr. Stefan V. Zachary's MIPS score?
Dr. Zachary's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
How many Medicare patients does Dr. Stefan V. Zachary see?
CMS counts 149 Medicare patients who saw Dr. Zachary in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Stefan V. Zachary bill to Medicare?
In 2024, Dr. Zachary's most billed Medicare services were injected or infused drug (J0775), injected or infused drug (J0702) and office visit, established patient (99213).
Where did Dr. Stefan V. Zachary go to medical school?
Dr. Zachary graduated from Ohio University, College of Osteopathic Medicine in 1989.
What drugs does Dr. Stefan V. Zachary prescribe most?
In 2024 Medicare Part D data, Dr. Zachary's most prescribed drugs by claims were Methylprednisolone.
Has Dr. Stefan V. Zachary received payments from drug or device companies?
CMS Open Payments shows $811 in general payments to Dr. Zachary from 4 companies from 2017 to 2025. The largest total came from Great Lakes Orthopedics.
How long has Dr. Stefan V. Zachary been practicing?
Dr. Zachary graduated from medical school in 1989, 37 years ago.
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