Stephen to, M.D.
NPI 1932165263 · Diagnostic Radiology Physician · Pomona, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen to, M.D. is a Diagnostic Radiology Physician provider in Pomona, CA (NPI 1932165263).
Provider details
- NPI number
- 1932165263
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G75106 (CA)
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
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
1,324 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 | 266 | $9 |
| Ct Scan Head Or Brain Without Contrast70450 | 94 | $41 |
| Ct Scan of Chest Without Contrast71250 | 94 | $51 |
| X-Ray of Chest, 2 Views71046 | 70 | $11 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 60 | $89 |
| X-Ray of Hip, 2-3 Views73502 | 59 | $11 |
| X-Ray of Knee, 3 Views73562 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-25
- Last updated
- 2012-06-12
Frequently asked questions
- What is Stephen to's NPI number?
- Stephen to's National Provider Identifier (NPI) is 1932165263, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen to's specialty?
- Stephen to is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen to located?
- Stephen to's practice location on file with NPPES is 1798 N Garey Ave, Pomona, CA 91767-2918.
- What is Stephen to's phone number?
- The practice phone number listed in the NPPES registry for Stephen to is (909) 865-9532.
- Does Stephen to accept Medicare?
- Stephen to is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen to's NPI active?
- Yes — Stephen to's NPI (1932165263) is active in the NPPES registry as of the last update on 2012-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.