Catherine Holznecht, M.D.
NPI 1689960023 · Diagnostic Radiology Physician · Madison, WI
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Holznecht, M.D. is a Diagnostic Radiology Physician provider in Madison, WI (NPI 1689960023).
Provider details
- NPI number
- 1689960023
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
223 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 140 | $8 |
| X-Ray of Chest, 2 Views71046 | 28 | $10 |
| Ct Scan Head Or Brain Without Contrast70450 | 21 | $36 |
| Screening 3d Breast Mammography77063 | 17 | $26 |
| Screening Mammography77067 | 17 | $33 |
Typical Medicare-allowed amounts for these services range $8–$36 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-23
- Last updated
- 2016-10-06
Frequently asked questions
- What is Catherine Holznecht's NPI number?
- Catherine Holznecht's National Provider Identifier (NPI) is 1689960023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Holznecht's specialty?
- Catherine Holznecht is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Holznecht located?
- Catherine Holznecht's practice location on file with NPPES is Uw Hospital and Clinics, Madison, WI 53792-0001.
- What is Catherine Holznecht's phone number?
- The practice phone number listed in the NPPES registry for Catherine Holznecht is (608) 263-8340.
- Does Catherine Holznecht accept Medicare?
- Catherine Holznecht is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Holznecht's NPI active?
- Yes — Catherine Holznecht's NPI (1689960023) is active in the NPPES registry as of the last update on 2016-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.