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JENNIFER W NIEDFELDT MD
NPI 1215943451
Anesthesiology in Grafton, WI

Active since July 31, 2006PECOS EnrolledAccepts Medicare Assignment
975 PORT WASHINGTON RD, GRAFTON, WI 53024(262) 329-1000 Get Directions Write a Review

NPPES record last updated: February 10, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Jennifer W Niedfeldt Md NPPES

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

JENNIFER W NIEDFELDT MD (NPI 1215943451) is an individual anesthesiology provider in Grafton, Wisconsin, licensed in Wisconsin (35679) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Aurora Medical Center, and maintains a secondary practice location in Glendale.

NPPES Registry Identity

NPI1215943451
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameJENNIFER W NIEDFELDTCredential: MD
Location Address975 PORT WASHINGTON RDGrafton, WI 53024-9201
Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250
Phone(262) 329-1000
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 1993
Enumeration DateJuly 31, 2006
Last NPPES UpdateFebruary 10, 2025
NPPES CertifiedFebruary 10, 2025
✔ NPI 1215943451 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in WI · 35679
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
975 PORT WASHINGTON RD, Grafton, WI 53024
Open in Google Maps ↗

Secondary Practice Location 1

Location 1575 West River Woods ParkwayGlendale, WI 53212 · Phone (414) 961-6700 · Fax (414) 961-6727

Other Identifiers 1

Medicaid32310700WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).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

Jennifer W Niedfeldt 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 ID8820060130
PECOS Enrollment IDI20120316000717
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

4

Medicare enrollment records show Jennifer Niedfeldt reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Orthopaedic Hospital Of Wisconsin, LLC
16 mi
General Acute Care Hospital
475 W RIVER WOODS PKWY
Glendale, WI 53212
  • Reassigned Medicare billing, Wisconsin enrollment
  • 62 clinicians in this Medicare group
NPI 1669584983 (414) 961-6800
Aurora Medical Group, Inc.
23 mi
Obstetrics & Gynecology
8905 W LINCOLN AVE, SUITE 515
West Allis, WI 53227
  • Reassigned Medicare billing, Wisconsin enrollment
  • 4,609 clinicians in this Medicare group
NPI 1457592735 (414) 328-8650
Osms Anesthesia LLC
79 mi
Anesthesiology
2223 LIME KILN RD STE 1
Green Bay, WI 54311
  • Reassigned Medicare billing, Wisconsin enrollment
  • 43 clinicians in this Medicare group
NPI 1447017983 (920) 430-8113
Green Bay Anesthesia Assoc. Sc
81 mi
Anesthesiology
835 S VAN BUREN ST
Green Bay, WI 54301
  • Reassigned Medicare billing, Wisconsin enrollment
  • 129 clinicians in this Medicare group
NPI 1023065836 (920) 433-0111

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.

Aurora Medical Center

Acute Care Hospitals · Grafton, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520207
Location975 Port Washington RoadGrafton, WI 53024 · Ozaukee County
Emergency services Birthing friendly

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.

ANNE R. HARLEY P.T.
Physical Therapist
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (262) 329-1000
MRS. MARGARET AIKINS KEUP APNP
Nurse Practitioner (Acute Care)
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (262) 329-1000
DR. TYLER ANDREW FRISQUE PHARMD
Pharmacist
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (262) 329-1600
CAITLIN DERENNE PA
Physician Assistant
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (360) 606-4292
ERIC M DORN M.D.
Radiology (Diagnostic Radiology)
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (262) 329-1000
DR. TIMOTHY JARON POW M.D.
Internal Medicine (Interventional Cardiology)
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (262) 329-8150
REBEKAH L OTTE NP
Nurse Practitioner
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (262) 329-8150
HAMID ABBAS AFSARI D.O.
Hospitalist
975 PORT WASHINGTON RD
GRAFTON, WI 53024
Ozaukee County (262) 329-1000

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 Jennifer Niedfeldt's NPI number?

The NPI number for Jennifer Niedfeldt is 1215943451. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Where is Jennifer Niedfeldt located?

Jennifer Niedfeldt practices at 975 Port Washington Rd, Grafton, WI 53024. The listed phone number is (262) 329-1000.

What is Jennifer Niedfeldt's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Jennifer Niedfeldt enrolled in Medicare?

Yes. Jennifer Niedfeldt 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 Jennifer Niedfeldt's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Niedfeldt reassigns Medicare benefits to 4 organizations: Orthopaedic Hospital Of Wisconsin, LLC (Glendale, WI), Aurora Medical Group, Inc. (West Allis, WI), Osms Anesthesia LLC (Green Bay, WI) and Green Bay Anesthesia Assoc. Sc (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 Jennifer Niedfeldt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jennifer Niedfeldt accept?

Health plans from CareSource (Common Ground Healthcare) list Jennifer Niedfeldt 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 Jennifer Niedfeldt affiliated with any hospitals?

According to CMS data, Jennifer Niedfeldt is affiliated with Aurora Medical Center.

When was this NPI record last updated?

The NPPES record for Jennifer Niedfeldt was last updated on February 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.