ISABEL NELLEN DO
NPI 1508220344
Obstetrics & Gynecology in Madison, WI
About Isabel Nellen Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ISABEL NELLEN DO (NPI 1508220344) is an individual obstetrics & gynecology provider in Madison, Wisconsin, licensed in Wisconsin (69229) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS, is affiliated with University Of Wi Hospitals & Clinics Authority, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 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
Isabel Nellen Do 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
2Medicare enrollment records show Isabel Nellen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Madison, WI 53719
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Madison Womens Health LLP
- 8 clinicians in this Medicare group
Glendale, WI 53217
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Columbia St Marys Hospital Milwaukee Inc
- 856 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Wi Hospitals & Clinics Authority
Acute Care Hospitals · Madison, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53719 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 4
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 Isabel Nellen's NPI number?
The NPI number for Isabel Nellen is 1508220344. It was assigned to this individual provider in the NPPES registry on April 7, 2016. The provider is also known as Isabel Rauguth.
Where is Isabel Nellen located?
Isabel Nellen practices at 5801 Research Park Blvd Ste 400, Madison, WI 53719. The listed phone number is (608) 729-6300.
What is Isabel Nellen's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Isabel Nellen enrolled in Medicare?
Yes. Isabel Nellen 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 Isabel Nellen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Isabel Nellen reassigns Medicare benefits to 2 organizations: Madison Women's Health, LLP (Madison, WI) and Columbia St. Mary's Hospital Milwaukee, Inc (Glendale, 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 Isabel Nellen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Isabel Nellen accept?
Health plans from Quartz list Isabel Nellen 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 Isabel Nellen affiliated with any hospitals?
According to CMS data, Isabel Nellen is affiliated with University Of Wi Hospitals & Clinics Authority.
When was this NPI record last updated?
The NPPES record for Isabel Nellen was last updated on October 11, 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.
# Isabel Nellen, DO · NPI 1508220344
Obstetrics & Gynecology physician in Madison, Wisconsin. Individual provider, active in the CMS NPPES registry since April 7, 2016.
## Identity
- **NPI:** 1508220344 (Entity type: Individual)
- **Enumerated:** April 7, 2016
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 69229 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 5801 RESEARCH PARK BLVD STE 400, Madison, WI 53719-6003
- **Phone:** (608) 729-6300 · **Fax:** (608) 729-1099
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Madison Women's Health, LLP (NPI 1174851851, Madison, WI); Columbia St. Mary's Hospital Milwaukee, Inc (NPI 1215945456, Glendale, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** October 11, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1508220344) · Data from the CMS NPPES public registry.