MARK S POLENTINI MD
NPI 1699752030
Emergency Medicine in Oconomowoc, WI
About Mark S Polentini Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK S POLENTINI MD (NPI 1699752030) is an individual emergency medicine provider in Oconomowoc, Wisconsin, licensed in Wisconsin (45242-020) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and maintains a secondary practice location in Milwaukee.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mark S Polentini Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Mark Polentini reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oconomowoc, WI 53066
- Reassigned Medicare billing, Wisconsin enrollment
- 29 clinicians in this Medicare group
West Allis, WI 53227
- Reassigned Medicare billing, Wisconsin enrollment
- 4,609 clinicians in this Medicare group
Milwaukee, WI 53209
- Reassigned Medicare billing, Wisconsin enrollment
- 1,615 clinicians in this Medicare group
Saint Francis, WI 53235
- Reassigned Medicare billing, Wisconsin enrollment
- 960 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Waukesha Memorial Hospital
Acute Care Hospitals · Waukesha, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53066 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mark Polentini's NPI number?
The NPI number for Mark Polentini is 1699752030. It was assigned to this individual provider in the NPPES registry on December 28, 2005.
Where is Mark Polentini located?
Mark Polentini practices at 1284 N Summit Ave, Oconomowoc, WI 53066. The listed phone number is (262) 569-3080.
What is Mark Polentini's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mark Polentini enrolled in Medicare?
Yes. Mark Polentini is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mark Polentini's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Polentini reassigns Medicare benefits to 4 organizations: Lake Country Emergency Physicians (Oconomowoc, WI), Aurora Medical Group, Inc. (West Allis, WI), Aurora Advanced Healthcare, Inc. (Milwaukee, WI) and Lakeshore Medical Clinic, LLC (Saint Francis, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Polentini's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Polentini accept?
Health plans from CareSource (Common Ground Healthcare) list Mark Polentini as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mark Polentini affiliated with any hospitals?
According to CMS data, Mark Polentini is affiliated with Waukesha Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Mark Polentini was last updated on December 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mark S Polentini, MD · NPI 1699752030
Emergency Medicine physician in Oconomowoc, Wisconsin. Individual provider, active in the CMS NPPES registry since December 28, 2005.
## Identity
- **NPI:** 1699752030 (Entity type: Individual)
- **Enumerated:** December 28, 2005
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 45242-020 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1284 N SUMMIT AVE, Oconomowoc, WI 53066-4459
- **Phone:** (262) 569-3080
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Lake Country Emergency Physicians (NPI 1720060585, Oconomowoc, WI); Aurora Medical Group, Inc. (NPI 1457592735, West Allis, WI); Aurora Advanced Healthcare, Inc. (NPI 1265629133, Milwaukee, WI); Lakeshore Medical Clinic, LLC (NPI 1003861188, Saint Francis, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 2001
## Record status
- **NPPES last updated:** December 29, 2025
- **Other identifiers:** Other 002 (WI); Medicaid 34590000 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1699752030) · Data from the CMS NPPES public registry.