John Wynsen, M.D.
NPI 1841231982 · Interventional Cardiology Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Wynsen, M.D. is a Interventional Cardiology Physician provider in Milwaukee, WI (NPI 1841231982).
Provider details
- NPI number
- 1841231982
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 27119 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
18 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 18 | $75 |
Typical Medicare-allowed amounts for these services range $75–$75 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (5)
- 16650 W Bluemound RdSuite 200Brookfield, WI 53005-5920Phone: (262) 827-9200Fax: (262) 827-9858
- W180n8085 Town Hall RdMenomonee Falls, WI 53051-3518Phone: (262) 251-1000Fax: (262) 518-5052
- 11430 N Port Washington RdMequon, WI 53092-3414Phone: (262) 518-1900Fax: (262) 518-5052
- 7901 S 6th StOak Creek, WI 53154-2010Phone: (414) 346-8000Fax: (414) 346-8010
- 3200 Pleasant Valley RdWest Bend, WI 53095-9274Phone: (262) 836-7300Fax: (262) 836-7301
Registry dates
- Enumerated
- 2006-06-09
- Last updated
- 2024-03-25
- Certified
- 2024-03-25
Frequently asked questions
- What is John Wynsen's NPI number?
- John Wynsen's National Provider Identifier (NPI) is 1841231982, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Wynsen's specialty?
- John Wynsen is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Wynsen located?
- John Wynsen's practice location on file with NPPES is 9200 W Wisconsin Ave, Milwaukee, WI 53226-3522.
- What is John Wynsen's phone number?
- The practice phone number listed in the NPPES registry for John Wynsen is (414) 805-6000.
- Does John Wynsen accept Medicare?
- John Wynsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Wynsen's NPI active?
- Yes — John Wynsen's NPI (1841231982) is active in the NPPES registry as of the last update on 2024-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.