Stephen Williams
NPI 1801356845 · Diagnostic Radiology Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Williams is a Diagnostic Radiology Physician provider in Milwaukee, WI (NPI 1801356845).
Provider details
- NPI number
- 1801356845
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 75935 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 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
58 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 Abdomen, 1 View74018 | 23 | $8 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 21 | $81 |
| Limited Ultrasound Scan of Abdomen76705 | 14 | $26 |
Typical Medicare-allowed amounts for these services range $8–$81 (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
- 2019-03-25
- Last updated
- 2024-03-29
- Certified
- 2024-03-27
Frequently asked questions
- What is Stephen Williams's NPI number?
- Stephen Williams's National Provider Identifier (NPI) is 1801356845, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Williams's specialty?
- Stephen Williams is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Williams located?
- Stephen Williams's practice location on file with NPPES is 9200 W Wisconsin Ave, Milwaukee, WI 53226-3522.
- What is Stephen Williams's phone number?
- The practice phone number listed in the NPPES registry for Stephen Williams is (414) 805-2060.
- Does Stephen Williams accept Medicare?
- Stephen Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Williams's NPI active?
- Yes — Stephen Williams's NPI (1801356845) is active in the NPPES registry as of the last update on 2024-03-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.