Katherine Karczewski, APRN
NPI 1447661673 · Nurse Practitioner · Summit, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Karczewski, APRN is a Nurse Practitioner provider in Summit, WI (NPI 1447661673).
Provider details
- NPI number
- 1447661673
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- 5788 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
264 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 98 | $101 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 86 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 31 | $68 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 29 | $88 |
| Simple Bladder Irrigation And/Or Instillation51700 | 20 | $57 |
Typical Medicare-allowed amounts for these services range $10–$101 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 65 | 55 |
| Tamsulosin Hcl | 58 | 32 |
| Tramadol Hcl | 42 | 37 |
| Alfuzosin Hclbrand: Alfuzosin Hcl Er | 21 | — |
| Estradiol | 18 | — |
| Finasteride | 18 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-05-09
- Last updated
- 2023-09-26
- Certified
- 2023-09-26
Frequently asked questions
- What is Katherine Karczewski's NPI number?
- Katherine Karczewski's National Provider Identifier (NPI) is 1447661673, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Karczewski's specialty?
- Katherine Karczewski is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katherine Karczewski located?
- Katherine Karczewski's practice location on file with NPPES is 36500 Aurora Dr, Summit, WI 53066-4899.
- What is Katherine Karczewski's phone number?
- The practice phone number listed in the NPPES registry for Katherine Karczewski is (262) 434-1000.
- Does Katherine Karczewski accept Medicare?
- Katherine Karczewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Karczewski's NPI active?
- Yes — Katherine Karczewski's NPI (1447661673) is active in the NPPES registry as of the last update on 2023-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.