Ronald Rivera, M.D.
NPI 1558716233 · Emergency Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Rivera, M.D. is a Emergency Medicine Physician provider in Orange, CA (NPI 1558716233).
Provider details
- NPI number
- 1558716233
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A169303 (CA)
Specialties & taxonomies
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
10 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
241 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 105 | $175 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 63 | $122 |
| Critical Care, First 30-74 Minutes99291 | 50 | $216 |
| Ultrasound of Heart, Follow-Up93308 | 23 | $26 |
Typical Medicare-allowed amounts for these services range $26–$216 (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
- 2016-04-29
- Last updated
- 2020-11-30
- Certified
- 2020-11-30
Frequently asked questions
- What is Ronald Rivera's NPI number?
- Ronald Rivera's National Provider Identifier (NPI) is 1558716233, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Rivera's specialty?
- Ronald Rivera is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Rivera located?
- Ronald Rivera's practice location on file with NPPES is 333 City Blvd W Ste 640, Orange, CA 92868-5915.
- What is Ronald Rivera's phone number?
- The practice phone number listed in the NPPES registry for Ronald Rivera is (714) 509-7664.
- Does Ronald Rivera accept Medicare?
- Ronald Rivera is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Rivera's NPI active?
- Yes — Ronald Rivera's NPI (1558716233) is active in the NPPES registry as of the last update on 2020-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.