MR. CARL A HOLBORN NURSE PRACTITIONER
NPI 1912597063
Nurse Practitioner - Acute Care in Waukesha, WI
About Mr. Carl A Holborn Nurse Practitioner NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. CARL A HOLBORN NURSE PRACTITIONER (NPI 1912597063) is an individual acute care provider in Waukesha, Wisconsin, licensed in Wisconsin (10588) and active in the NPI registry since January 2021. He is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
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
Mr. Carl A Holborn Nurse Practitioner 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
3Medicare enrollment records show Carl Holborn reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Waukesha, WI 53188
- Reassigned Medicare billing, Wisconsin enrollment
- 528 clinicians in this Medicare group
Glendale, WI 53212
- Reassigned Medicare billing, Wisconsin enrollment
- 1,343 clinicians in this Medicare group
Mount Pleasant, WI 53405
- Reassigned Medicare billing, Wisconsin enrollment
- 72 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 2
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Waukesha Memorial Hospital
Acute Care Hospitals · Waukesha, WIOconomowoc Memorial Hospital
Acute Care Hospitals · Oconomowoc, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53188 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.
WAUKESHA, WI 53188
WAUKESHA, WI 53188
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 Carl Holborn's NPI number?
The NPI number for Carl Holborn is 1912597063. It was assigned to this individual provider in the NPPES registry on January 22, 2021.
Where is Carl Holborn located?
Carl Holborn practices at 725 American Ave, Waukesha, WI 53188. The listed phone number is (262) 928-1000.
What is Carl Holborn's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Carl Holborn enrolled in Medicare?
Yes. Carl Holborn 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 Carl Holborn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carl Holborn reassigns Medicare benefits to 3 organizations: Prohealth Medical Group Inc (Waukesha, WI), Ascension Medical Group-Southeast Wisconsin Inc (Glendale, WI) and Midwest Critical Care Sc (Mount Pleasant, 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 Carl Holborn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Carl Holborn accept?
Health plans from Dean Health Plan and Network Health list Carl Holborn 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 Carl Holborn affiliated with any hospitals?
According to CMS data, Carl Holborn is affiliated with Waukesha Memorial Hospital and Oconomowoc Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Carl Holborn was last updated on January 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Mr. Carl A Holborn, NURSE PRACTITIONER · NPI 1912597063
Acute Care physician in Waukesha, Wisconsin. Individual provider, active in the CMS NPPES registry since January 22, 2021.
## Identity
- **NPI:** 1912597063 (Entity type: Individual)
- **Enumerated:** January 22, 2021
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 10588 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 AMERICAN AVE, Waukesha, WI 53188-5031
- **Phone:** (262) 928-1000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Prohealth Medical Group Inc (NPI 1629225677, Waukesha, WI); Ascension Medical Group-Southeast Wisconsin Inc (NPI 1609881077, Glendale, WI); Midwest Critical Care Sc (NPI 1093425647, Mount Pleasant, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** January 22, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1912597063) · Data from the CMS NPPES public registry.