KERRY L AHRENS M.D.
NPI 1639497621
Emergency Medicine in Green Bay, WI
About Kerry L Ahrens M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KERRY L AHRENS M.D. (NPI 1639497621) is an individual emergency medicine provider in Green Bay, Wisconsin, licensed in Wisconsin (56440) and active in the NPI registry since May 2010. She is enrolled in Medicare PECOS, is affiliated with Aurora Medical Ctr Manitowoc County, and is a graduate of Medical College Of Wisconsin (2010).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Kerry L Ahrens M.d. 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
8Medicare enrollment records show Kerry Ahrens reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Green Bay, WI 54311
- Reassigned Medicare billing, Wisconsin enrollment
- 394 clinicians in this Medicare group
Green Bay, WI 54311
- Reassigned Medicare billing, Wisconsin enrollment
- 275 clinicians in this Medicare group
Two Rivers, WI 54241
- Reassigned Medicare billing, Wisconsin enrollment
- 55 clinicians in this Medicare group
Oshkosh, WI 54904
- Reassigned Medicare billing, Wisconsin enrollment
- 28 clinicians in this Medicare group
Sheboygan, WI 53081
- Reassigned Medicare billing, Wisconsin enrollment
- 4,609 clinicians in this Medicare group
Sheboygan, WI 53081
- Reassigned Medicare billing, Wisconsin enrollment
- 34 clinicians in this Medicare group
Wausau, WI 54401
- Reassigned Medicare billing, Wisconsin enrollment
- 2,832 clinicians in this Medicare group
Janesville, WI 53548
- Reassigned Medicare billing, Wisconsin enrollment
- 1,155 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 4
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Aurora Medical Ctr Manitowoc County
Acute Care Hospitals · Two Rivers, WIBay Area Medical Center
Acute Care Hospitals · Marinette, WIAurora Baycare Medical Ctr
Acute Care Hospitals · Green Bay, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54311 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GREEN BAY, WI 54311
GREEN BAY, WI 54311
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 Kerry Ahrens's NPI number?
The NPI number for Kerry Ahrens is 1639497621. It was assigned to this individual provider in the NPPES registry on May 14, 2010.
Where is Kerry Ahrens located?
Kerry Ahrens practices at 2845 Greenbrier Rd, Green Bay, WI 54311. The listed phone number is (920) 288-4060.
What is Kerry Ahrens's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Kerry Ahrens enrolled in Medicare?
Yes. Kerry Ahrens 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 Kerry Ahrens's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kerry Ahrens reassigns Medicare benefits to 8 organizations: Baycare Aurora, LLC (Green Bay, WI), Baycare Clinic LLP (Green Bay, WI), Aurora Health Care North, Inc. (Two Rivers, WI), Aurora Medical Center Of Oshkosh, Inc (Oshkosh, WI), Aurora Medical Group, Inc. (Sheboygan, WI) and 3 more organizations, listed in the Medicare section above. 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 Kerry Ahrens's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kerry Ahrens accept?
Health plans from CareSource (Common Ground Healthcare) and Group Health Cooperative-SCW list Kerry Ahrens 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 Kerry Ahrens affiliated with any hospitals?
According to CMS data, Kerry Ahrens is affiliated with Aurora Medical Ctr Manitowoc County, Bay Area Medical Center and Aurora Baycare Medical Ctr.
When was this NPI record last updated?
The NPPES record for Kerry Ahrens was last updated on April 9, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.
# Kerry L Ahrens, M.D. · NPI 1639497621
Emergency Medicine physician in Green Bay, Wisconsin. Individual provider, active in the CMS NPPES registry since May 14, 2010.
## Identity
- **NPI:** 1639497621 (Entity type: Individual)
- **Enumerated:** May 14, 2010
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 56440 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 2845 GREENBRIER RD, Green Bay, WI 54311-6519
- **Phone:** (920) 288-4060 · **Fax:** (920) 288-4067
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Baycare Aurora, LLC (NPI 1255387726, Green Bay, WI); Baycare Clinic LLP (NPI 1588609648, Green Bay, WI); Aurora Health Care North, Inc. (NPI 1477508687, Two Rivers, WI); Aurora Medical Center Of Oshkosh, Inc (NPI 1275578064, Oshkosh, WI); Aurora Medical Group, Inc. (NPI 1174670244, Sheboygan, WI); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 2010
## Record status
- **NPPES last updated:** April 9, 2024
- **Other identifiers:** Medicaid 1639497621 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1639497621) · Data from the CMS NPPES public registry.