Santiago Lopez
NPI 1104489897 · Emergency Medicine Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Santiago Lopez is a Emergency Medicine Physician provider in Fontana, CA (NPI 1104489897).
Provider details
- NPI number
- 1104489897
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 184318 (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
7 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
36 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 Moderate Level of Medical Decision Making99284 | 36 | $120 |
Typical Medicare-allowed amounts for these services range $120–$120 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefpodoxime Proxetil | 65 | 65 |
| Azithromycin | 24 | 24 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 22 | 22 |
| Prednisone | 18 | 17 |
| Methocarbamol | 18 | 18 |
| Ibuprofen | 17 | 17 |
| Doxycycline Monohydrate | 16 | 16 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-04-17
- Last updated
- 2023-10-27
- Certified
- 2023-06-22
Frequently asked questions
- What is Santiago Lopez's NPI number?
- Santiago Lopez's National Provider Identifier (NPI) is 1104489897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Santiago Lopez's specialty?
- Santiago Lopez is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Santiago Lopez located?
- Santiago Lopez's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Santiago Lopez's phone number?
- The practice phone number listed in the NPPES registry for Santiago Lopez is (833) 574-2273.
- Does Santiago Lopez accept Medicare?
- Santiago Lopez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Santiago Lopez's NPI active?
- Yes — Santiago Lopez's NPI (1104489897) is active in the NPPES registry as of the last update on 2023-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.