TAMMY JOHNSEN NP
NPI 1073713913
Nurse Practitioner in Waukesha, WI
About Tammy Johnsen Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TAMMY JOHNSEN NP (NPI 1073713913) is an individual nurse practitioner in Waukesha, Wisconsin, licensed in Wisconsin (7504) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and is a graduate of Other (2003).
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
Tammy Johnsen Np 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 Reassignment
Medicare enrollment records show Tammy Johnsen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Waukesha, WI 53188
- Reassigned Medicare billing, Wisconsin enrollment
- 528 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Tammy Johnsen's NPI number?
The NPI number for Tammy Johnsen is 1073713913. It was assigned to this individual provider in the NPPES registry on July 19, 2007.
Where is Tammy Johnsen located?
Tammy Johnsen practices at 721 American Ave Ste 403, Waukesha, WI 53188. The listed phone number is (262) 549-1516.
What is Tammy Johnsen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Tammy Johnsen enrolled in Medicare?
Yes. Tammy Johnsen 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 organization bills Medicare for Tammy Johnsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Johnsen reassigns Medicare benefits to Prohealth Medical Group Inc (Waukesha, WI). The 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 Tammy Johnsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tammy Johnsen accept?
Health plans from Dean Health Plan, Network Health and UnitedHealthcare list Tammy Johnsen 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 Tammy Johnsen affiliated with any hospitals?
According to CMS data, Tammy Johnsen is affiliated with Waukesha Memorial Hospital and Oconomowoc Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Tammy Johnsen was last updated on August 22, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Tammy Johnsen, NP · NPI 1073713913
Nurse Practitioner physician in Waukesha, Wisconsin. Individual provider, active in the CMS NPPES registry since July 19, 2007.
## Identity
- **NPI:** 1073713913 (Entity type: Individual)
- **Enumerated:** July 19, 2007
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 7504 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 721 AMERICAN AVE STE 403, Waukesha, WI 53188-5071
- **Phone:** (262) 549-1516 · **Fax:** (262) 549-0648
## 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:** Prohealth Medical Group Inc (NPI 1629225677, Waukesha, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2003
## Record status
- **NPPES last updated:** August 22, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1073713913) · Data from the CMS NPPES public registry.