Uc Regents
NPI 1902177785 · Diagnostic Radiology Physician · Fountain Valley, CA
Enrolled with Medicare as Part B Supplier - Independent Diagnostic Testing Facility (idtf) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Uc Regents is a Diagnostic Radiology Physician organization in Fountain Valley, CA (NPI 1902177785).
Provider details
- NPI number
- 1902177785
- Entity type
- Organization
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Parent organization
- Uc Regents
- Organization subpart
- Yes
- Authorized official
- Randolph Siwabessy, Vice President and Chief Financial(714) 456-5180
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
14 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
2,275 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) |
|---|---|---|
| Screening Mammography77067 | 251 | $144 |
| Screening 3d Breast Mammography77063 | 246 | $57 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 205 | $44 |
| Complete Ultrasound Scan of Abdomen76700 | 175 | $131 |
| X-Ray of Chest, 2 Views71046 | 164 | $38 |
| Complete Ultrasound Scan of 1 Breast76641 | 133 | $164 |
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Uci Health-Fountain Valley Imaging-Warner Ave
- Doing business as
- Uci Health-Fountain Valley Imaging-Warner
Registry dates
- Enumerated
- 2012-01-25
- Last updated
- 2024-05-21
- Certified
- 2024-05-21
Frequently asked questions
- What is Uc Regents's NPI number?
- Uc Regents's National Provider Identifier (NPI) is 1902177785, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Uc Regents?
- Uc Regents is classified in the NPPES registry as Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Uc Regents located?
- Uc Regents's practice location on file with NPPES is 11190 Warner Ave, Fountain Valley, CA 92708-4019.
- What is Uc Regents's phone number?
- The practice phone number listed in the NPPES registry for Uc Regents is (714) 456-5676.
- Does Uc Regents accept Medicare?
- Uc Regents is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Uc Regents?
- The authorized official listed on Uc Regents's NPPES record is Randolph Siwabessy, Vice President and Chief Financial. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Uc Regents's NPI active?
- Yes — Uc Regents's NPI (1902177785) is active in the NPPES registry as of the last update on 2024-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.