John Karwowski, MD
General Surgery · Vascular Surgery (CMS) · Dayton, OH
At a glance
1 Wyoming St Ste 4130, Dayton, OH 45409-2722
Published activity: Leg revascularization (restoring blood flow) · Removal of tissue · Spinal fusion. View counts and coverage
NPPES record updated Oct 5, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
1 Wyoming St Ste 4130Dayton, OH 45409-2722
Additional reported practice locations
22 S Greene StBaltimore, MD 212011544
Phone: 4103285840
Fax: 4103280717
Education & affiliations
- Medical / professional school
- Tufts University School Of Medicine
- Graduation year
- 1995
- CMS specialties
- General Surgery · Vascular Surgery
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- University Of Maryland Medical Center Baltimore, MD
- University Of Md Medical Center Midtown Campus Baltimore, MD
- University Of Md Shore Medical Center At Easton Easton, MD
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Leg revascularization (restoring blood flow) | 12 |
| Removal of tissue | 1-10 |
| Spinal fusion | 14 |
| Varicose vein removal | 1-10 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $495.36 |
Reporting companies
| Company | Amount |
|---|---|
| BOSTON SCIENTIFIC CORPORATION | $182.83 |
| BAXTER HEALTHCARE | $147.83 |
| BECTON, DICKINSON AND COMPANY | $73.29 |
| TERUMO MEDICAL CORPORATION | $46.14 |
| SMITH+NEPHEW, INC. | $24.27 |
| LAMINATE MEDICAL TECHNOLOGIES INC. | $21.00 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- General Surgery · Vascular Surgery (CMS)
- Taxonomy code
- 2086S0129X
- Enumeration date
- Jul 26, 2006
- Record updated
- Oct 5, 2026
More registry details
- Provider type
- Individual · Type 1
- Other reported name
- JAN KARWOWSKI
- Reported credentials
- MD
Reported taxonomies and licenses
2086S0129X
License reported: ME116901 FL
2086S0129X · Primary
License reported: D84011 MD
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
1 Wyoming St Ste 4130Dayton, OH 45409-2722
- Phone
- (937) 438-8640
- Fax
- (937) 438-7251
Mailing address
PO BOX 64226BALTIMORE, MD 212644226
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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