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KATHARINA S STEWART MD
NPI 1053380345
Obstetrics & Gynecology - Maternal & Fetal Medicine in Madison, WI

Active since March 17, 2006PECOS EnrolledAccepts Medicare Assignment
202 S PARK ST, MADISON, WI 53715(608) 417-6667(608) 417-6364 Get Directions Write a Review

NPPES record last updated: April 7, 2009. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Katharina S Stewart Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATHARINA S STEWART MD (NPI 1053380345) is an individual maternal & fetal medicine provider in Madison, Wisconsin, licensed in Wisconsin (39824) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Unitypoint Health - Meriter, and is a graduate of Ohio State University College Of Medicine (1992).

NPPES Registry Identity

NPI1053380345
Entity TypeIndividualFemale
Primary Taxonomy207VM0101X
Provider Legal NameKATHARINA S STEWARTCredential: MD
Location Address202 S PARK STMadison, WI 53715-1507
Mailing Address7974 Uw Health CtMiddleton, WI 53562-5531
Phone(608) 417-6667
Fax(608) 417-6364
Sole ProprietorNo
Medical School CMSOhio State University College Of MedicineGraduated 1992
Enumeration DateMarch 17, 2006
Last NPPES UpdateApril 7, 2009
✔ NPI 1053380345 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207VM0101X
License✔ Licensed in WI · 39824
Definition
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.
202 S PARK ST, Madison, WI 53715
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare) and more.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

Katharina S Stewart Md 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.

PECOS PAC ID4486559275
PECOS Enrollment IDI20031204000736
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

5

Medicare enrollment records show Katharina Stewart reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of Wisconsin Medical Foundation, Inc
6.6 mi
Multi-Specialty
7974 UW HEALTH COURT
Middleton, WI 53562
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,832 clinicians in this Medicare group
NPI 1598784555 (608) 829-5485
Prohealth Medical Group Inc
35 mi
Internal Medicine
109 AIR PARK DR
Watertown, WI 53094
  • Reassigned Medicare billing, Wisconsin enrollment
  • 528 clinicians in this Medicare group
NPI 1629119417 (262) 928-5100
Watertown Physician Practices LLC
36 mi
Family Medicine
1507 DOCTORS CT
Watertown, WI 53094
  • Reassigned Medicare billing, Wisconsin enrollment
  • 215 clinicians in this Medicare group
NPI 1770964363 (920) 261-4111
St. Nicholas Hospital-Sisters Of The Third Order Of St Francis
96 mi
General Acute Care Hospital
3100 SUPERIOR AVE
Sheboygan, WI 53081
  • Reassigned Medicare billing, Wisconsin enrollment
  • 673 clinicians in this Medicare group
NPI 1730184342 (920) 459-8300
St Vincent Hospital-Hospital Sisters-Third Order Of St Francis
118 mi
General Practice
2710 EXECUTIVE DR
Green Bay, WI 54304
  • Reassigned Medicare billing, Wisconsin enrollment
  • 742 clinicians in this Medicare group
NPI 1285613638 (920) 433-8287

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.

Unitypoint Health - Meriter

Acute Care Hospitals · Madison, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520089
Location202 S Park StMadison, WI 53715 · Dane County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53715 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$123.69 typical visit price
range $53.90 – $163.24
Typical copayment $30.92 (range $13.47 – $40.81)
Most-billed visit code 99204
Established Patient
$67.37 typical visit price
range $17.40 – $133.76
Typical copayment $16.84 (range $4.35 – $33.44)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

ASHLEY N BERKA NURSE PRACTITIONER
Nurse Practitioner
202 S PARK ST
MADISON, WI 53715
Dane County (608) 417-6667
BROOK INGEBRIGTSON APNP
Nurse Practitioner (Neonatal, Critical Care)
202 S PARK ST
MADISON, WI 53715
Dane County (608) 417-6236
PAUL LADWIG RN
Registered Nurse
202 S PARK ST
MADISON, WI 53715
Dane County (608) 417-6000
DIXITA KAPPELL NP
Nurse Practitioner (Neonatal, Critical Care)
202 S PARK ST
MADISON, WI 53715
Dane County (608) 417-6236
SUSAN R WILHELM PA-C
Physician Assistant (Medical)
202 S PARK ST, MERITER ATRIUM
MADISON, WI 53715
Dane County (608) 417-5970
PETER GERARD PRYDE MD
Anesthesiology
202 S PARK ST, 4 TOWER
MADISON, WI 53715
Dane County (608) 267-6676
SUSAN MENG PT
Physical Therapist
202 S PARK ST
MADISON, WI 53715
Dane County (608) 417-6000
BRIAN DAVID GRIFFITH M.D.
Internal Medicine (Critical Care Medicine)
202 S PARK ST
MADISON, WI 53715
Dane County (608) 417-5950

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 Katharina Stewart's NPI number?

The NPI number for Katharina Stewart is 1053380345. It was assigned to this individual provider in the NPPES registry on March 17, 2006.

Where is Katharina Stewart located?

Katharina Stewart practices at 202 S Park St, Madison, WI 53715. The listed phone number is (608) 417-6667.

What is Katharina Stewart's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Is Katharina Stewart enrolled in Medicare?

Yes. Katharina Stewart 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 Katharina Stewart's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katharina Stewart reassigns Medicare benefits to 5 organizations: University Of Wisconsin Medical Foundation, Inc (Middleton, WI), Prohealth Medical Group Inc (Watertown, WI), Watertown Physician Practices LLC (Watertown, WI), St. Nicholas Hospital-Sisters Of The Third Order Of St Francis (Sheboygan, WI) and St Vincent Hospital-Hospital Sisters-Third Order Of St Francis (Green Bay, 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 Katharina Stewart's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Katharina Stewart accept?

Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare), Dean Health Plan and Group Health Cooperative-SCW and 4 other insurers list Katharina Stewart 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 Katharina Stewart affiliated with any hospitals?

According to CMS data, Katharina Stewart is affiliated with Unitypoint Health - Meriter.

When was this NPI record last updated?

The NPPES record for Katharina Stewart was last updated on April 7, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.