Matthew Demarest, MD
NPI 1619546322 · Emergency Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Demarest, MD is a Emergency Medicine Physician provider in Los Angeles, CA (NPI 1619546322).
Provider details
- NPI number
- 1619546322
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A198598 (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
1 documented practice location
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
Registry dates
- Enumerated
- 2021-06-18
- Last updated
- 2026-02-18
- Certified
- 2026-02-18
Frequently asked questions
- What is Matthew Demarest's NPI number?
- Matthew Demarest's National Provider Identifier (NPI) is 1619546322, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Demarest's specialty?
- Matthew Demarest is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Demarest located?
- Matthew Demarest's practice location on file with NPPES is 1200 N State St, Los Angeles, CA 90033-1029.
- What is Matthew Demarest's phone number?
- The practice phone number listed in the NPPES registry for Matthew Demarest is (323) 409-7053.
- Does Matthew Demarest accept Medicare?
- Matthew Demarest is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Demarest's NPI active?
- Yes — Matthew Demarest's NPI (1619546322) is active in the NPPES registry as of the last update on 2026-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.