William Karczewski, M.D.
NPI 1275896490 · Diagnostic Radiology Physician · Edina, MN
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Karczewski, M.D. is a Diagnostic Radiology Physician provider in Edina, MN (NPI 1275896490).
Provider details
- NPI number
- 1275896490
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301100753 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,884 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 505 | $8 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 263 | $81 |
| Screening Mammography77067 | 237 | $34 |
| Screening 3d Breast Mammography77063 | 236 | $27 |
| Mri Scan of Pelvis Before and After Contrast72197 | 183 | $99 |
| Screening 3d Breast Mammography77063 | 175 | $27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$222 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1105 Sixth StTraverse City, MI 49684-2345Phone: (231) 935-0497
Registry dates
- Enumerated
- 2012-06-21
- Last updated
- 2025-12-17
- Certified
- 2025-12-17
Frequently asked questions
- What is William Karczewski's NPI number?
- William Karczewski's National Provider Identifier (NPI) is 1275896490, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Karczewski's specialty?
- William Karczewski is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Karczewski located?
- William Karczewski's practice location on file with NPPES is 3600 Minnesota Dr Ste 800, Edina, MN 55435-7915.
- What is William Karczewski's phone number?
- The practice phone number listed in the NPPES registry for William Karczewski is (952) 595-1100.
- Does William Karczewski accept Medicare?
- William Karczewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Karczewski's NPI active?
- Yes — William Karczewski's NPI (1275896490) is active in the NPPES registry as of the last update on 2025-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.