John Sowinski, MD
NPI 1881190627 · Diagnostic Radiology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Sowinski, MD is a Diagnostic Radiology Physician provider in San Francisco, CA (NPI 1881190627).
Provider details
- NPI number
- 1881190627
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A187039 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,230 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 | 362 | $9 |
| Ct Scan of Chest Without Contrast71250 | 93 | $54 |
| X-Ray of Chest, 2 Views71046 | 84 | $11 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 83 | $91 |
| Complete Ultrasound Scan Behind Abdominal Cavity76770 | 80 | $37 |
| Ct Scan Head Or Brain Without Contrast70450 | 51 | $41 |
| Nuclear Medicine Study From Skull Base to Mid-Thigh With Ct Scan |
Practice location
Mailing address
Additional practice locations (1)
- 1001 Potrero AvenueBldg. 5, 1st Fl.San Francisco, CA 94110Phone: (628) 206-8020
Registry dates
- Enumerated
- 2018-04-02
- Last updated
- 2026-03-19
- Certified
- 2026-03-19
Frequently asked questions
- What is John Sowinski's NPI number?
- John Sowinski's National Provider Identifier (NPI) is 1881190627, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Sowinski's specialty?
- John Sowinski is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Sowinski located?
- John Sowinski's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-2204.
- What is John Sowinski's phone number?
- The practice phone number listed in the NPPES registry for John Sowinski is (415) 502-2673.
- Does John Sowinski accept Medicare?
- John Sowinski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Sowinski's NPI active?
- Yes — John Sowinski's NPI (1881190627) is active in the NPPES registry as of the last update on 2026-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.