MARY L THEISEN NP
NPI 1396248407
Nurse Practitioner - Family in Milwaukee, WI
About Mary L Theisen Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY L THEISEN NP (NPI 1396248407) is an individual family provider in Milwaukee, Wisconsin, licensed in Wisconsin (8349-33) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS and maintains 5 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 5
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 (PECOS)
Mary L Theisen Np is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mary Theisen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Milwaukee, WI 53224
- Reassigned Medicare billing, Wisconsin enrollment
- 9 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53224 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 5
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 Mary Theisen's NPI number?
The NPI number for Mary Theisen is 1396248407. It was assigned to this individual provider in the NPPES registry on March 14, 2018.
Where is Mary Theisen located?
Mary Theisen practices at 11002 W Park Pl, Milwaukee, WI 53224. The listed phone number is (414) 365-8300.
What is Mary Theisen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Mary Theisen enrolled in Medicare?
Yes. Mary Theisen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Theisen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Theisen reassigns Medicare benefits to Horizon Home Care & Hospice, Inc. (Milwaukee, 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 Mary Theisen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Theisen accept?
Health plans from Anthem Blue Cross and Blue Shield list Mary Theisen 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.
When was this NPI record last updated?
The NPPES record for Mary Theisen was last updated on March 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Mary L Theisen, NP · NPI 1396248407
Family physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since March 14, 2018.
## Identity
- **NPI:** 1396248407 (Entity type: Individual)
- **Enumerated:** March 14, 2018
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 8349-33 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 11002 W PARK PL, Milwaukee, WI 53224-3615
- **Phone:** (414) 365-8300
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Horizon Home Care & Hospice, Inc. (NPI 1780687327, Milwaukee, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 18, 2026
- **Other identifiers:** Medicaid 1396248407 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1396248407) · Data from the CMS NPPES public registry.