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CATHERINE BRECK HOLZNECHT M.D.
NPI 1689960023
Radiology - Diagnostic Radiology in Madison, WI

Active since June 23, 2011PECOS EnrolledAccepts Medicare Assignment
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831, MADISON, WI 53792(608) 263-8340(608) 263-0682 Get Directions Write a Review

NPPES record last updated: October 6, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Catherine Breck Holznecht M.d. NPPES

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

CATHERINE BRECK HOLZNECHT M.D. (NPI 1689960023) is an individual diagnostic radiology provider in Madison, Wisconsin, licensed in Wisconsin (60296) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS and is a graduate of Other (2011).

NPPES Registry Identity

NPI1689960023
Entity TypeIndividualFemale
Primary Taxonomy2085R0202X
Provider Legal NameCATHERINE BRECK HOLZNECHTCredential: M.D.
Location AddressUW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831Madison, WI 53792-0001
Mailing Address7974 Uw Health CtMiddleton, WI 53562-5531
Phone(608) 263-8340
Fax(608) 263-0682
Sole ProprietorNo
Medical School CMSOtherGraduated 2011
Enumeration DateJune 23, 2011
Last NPPES UpdateOctober 6, 2016
✔ NPI 1689960023 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in WI · 60296
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
UW HOSPITAL AND CLINICS, Madison, WI 53792
Open in Google Maps ↗

Other Names 1

Former Name (1)Catherine Breck Grogan M.d.

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Group Health Cooperative-SCW, Oscar Health, Oscar Insurance Company 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

Catherine Breck Holznecht M.d. 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 ID3779888789
PECOS Enrollment IDI20170531000738
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 Catherine Holznecht reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Upland Hills Health, Inc
15 mi
Family Medicine
1809 SPRINGDALE STREET
Mount Horeb, WI 53572
  • Reassigned Medicare billing, Wisconsin enrollment
  • 166 clinicians in this Medicare group
NPI 1245628452 (608) 930-8000
Midwest Medical Center
66 mi
Clinic/Center
117 N MAIN ST
Elizabeth, IL 61028
  • Reassigned Medicare billing, Illinois enrollment
  • Also billed through NPI 1952409765 (Illinois)
  • 51 clinicians in this Medicare group
NPI 1295126944 (815) 858-2238
Mercy Radiologists Of Dubuque, P.C.
75 mi
Diagnostic Radiology
250 MERCY DR
Dubuque, IA 52001
  • Reassigned Medicare billing, Iowa enrollment
  • Medicare enrollment name: Mercy Radiologists Of Dubuque PC
  • 8 clinicians in this Medicare group
NPI 1013968205 (563) 589-8796
Jackson County Public Hospital
95 mi
Critical Access
601 HOSPITAL DRIVE
Maquoketa, IA 52060
  • Reassigned Medicare billing, Iowa enrollment
  • 65 clinicians in this Medicare group
NPI 1912960758 (563) 652-2474
Radiology One Medical Group PC
1,379 mi
Diagnostic Radiology
9393 N 90TH ST STE 102-718
Scottsdale, AZ 85258
  • Reassigned Medicare billing, Iowa enrollment
  • 8 clinicians in this Medicare group
NPI 1700670197 (480) 845-0009

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 5

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.

X-ray of chest, 1 view 71045
A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.
140 services85 patients
X-ray of chest, 2 views 71046
A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.
28 services26 patients
Ct scan head or brain without contrast 70450
A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.
21 services20 patients
Screening 3d breast mammography 77063
Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.
17 services17 patients
Screening mammography 77067
Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.
17 services17 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53792 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
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
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.

DINA MARIE PITTA MD
Surgery
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-6400
CAN M SAVASMAN M.D.
Student in an Organized Health Care Education/Training Program
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 262-7158
JUDITH NIR M.D.
Student in an Organized Health Care Education/Training Program
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-0572
MADELYN KAY ALVAREZ MD
Internal Medicine
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-5660
DR. IAN JOSEPH KOSZEWSKI M.D.
Otolaryngology
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-0192
DR. AMIN AFRAZI MD,PH.D
Surgery
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-1377
DANIEL R MATSON
Pathology (Hematology)
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVENUE
MADISON, WI 53792
Dane County (608) 263-8443
MEGAN E PETERS M.D.
Pediatrics (Pediatric Critical Care Medicine)
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8049

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 Catherine Holznecht's NPI number?

The NPI number for Catherine Holznecht is 1689960023. It was assigned to this individual provider in the NPPES registry on June 23, 2011. The provider is also known as Catherine Breck Grogan M.D..

Where is Catherine Holznecht located?

Catherine Holznecht practices at Uw Hospital And Clinics 600 Highland Ave, H4/831, Madison, WI 53792. The listed phone number is (608) 263-8340.

What is Catherine Holznecht's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Catherine Holznecht enrolled in Medicare?

Yes. Catherine Holznecht 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 Catherine Holznecht's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Holznecht reassigns Medicare benefits to 5 organizations: Upland Hills Health, Inc (Mount Horeb, WI), Midwest Medical Center (Elizabeth, IL), Mercy Radiologists Of Dubuque, P.C. (Dubuque, IA), Jackson County Public Hospital (Maquoketa, IA) and Radiology One Medical Group PC (Scottsdale, AZ). 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 Catherine Holznecht's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Catherine Holznecht accept?

Health plans from Group Health Cooperative-SCW, Oscar Health, Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Catherine Holznecht 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 Catherine Holznecht was last updated on October 6, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.