Steven Siwik, MD
NPI 1821069089 · Diagnostic Radiology Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Siwik, MD is a Diagnostic Radiology Physician provider in Tucson, AZ (NPI 1821069089).
Provider details
- NPI number
- 1821069089
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 22916 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
2,937 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 | 327 | $8 |
| Ultrasound Scan of Head and Neck Soft Tissue76536 | 253 | $101 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 143 | $81 |
| X-Ray of Chest, 2 Views71046 | 140 | $29 |
| Ct Scan of Chest Without Contrast71250 | 117 | $107 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 108 | $134 |
| Ultrasound of Both Sides of Head and Neck Blood Flow |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-27
- Last updated
- 2013-02-27
Frequently asked questions
- What is Steven Siwik's NPI number?
- Steven Siwik's National Provider Identifier (NPI) is 1821069089, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Siwik's specialty?
- Steven Siwik is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Siwik located?
- Steven Siwik's practice location on file with NPPES is 677 N Wilmot Rd, Tucson, AZ 85711-2701.
- What is Steven Siwik's phone number?
- The practice phone number listed in the NPPES registry for Steven Siwik is (520) 795-2889.
- Does Steven Siwik accept Medicare?
- Steven Siwik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Siwik's NPI active?
- Yes — Steven Siwik's NPI (1821069089) is active in the NPPES registry as of the last update on 2013-02-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.