Sergio Marquez, MD
NPI 1851967178 · Emergency Medicine Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sergio Marquez, MD is a Emergency Medicine Physician provider in Loma Linda, CA (NPI 1851967178).
Provider details
- NPI number
- 1851967178
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A198101 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (1)
- 820 E Mountain View StBarstow, CA 92311-3004Phone: (858) 863-7382Fax: (858) 863-7382
Registry dates
- Enumerated
- 2021-05-27
- Last updated
- 2025-10-03
- Certified
- 2025-10-03
Frequently asked questions
- What is Sergio Marquez's NPI number?
- Sergio Marquez's National Provider Identifier (NPI) is 1851967178, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sergio Marquez's specialty?
- Sergio Marquez is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sergio Marquez located?
- Sergio Marquez's practice location on file with NPPES is 11234 Anderson Street, Gme Office Westerly Suite C, Loma Linda, CA 92354-2804.
- What is Sergio Marquez's phone number?
- The practice phone number listed in the NPPES registry for Sergio Marquez is (909) 558-4085.
- Does Sergio Marquez accept Medicare?
- Sergio Marquez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sergio Marquez's NPI active?
- Yes — Sergio Marquez's NPI (1851967178) is active in the NPPES registry as of the last update on 2025-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.