Carl Speizer, MD
NPI 1922012947 · Emergency Medicine Physician · Napa, CA
Carl Speizer, MD is a Emergency Medicine Physician provider in Napa, CA (NPI 1922012947).
Provider details
- NPI number
- 1922012947
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G53518 (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 tenure38% of score
19 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
- 2006-07-27
- Last updated
- 2009-02-17
Frequently asked questions
- What is Carl Speizer's NPI number?
- Carl Speizer's National Provider Identifier (NPI) is 1922012947, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carl Speizer's specialty?
- Carl Speizer is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carl Speizer located?
- Carl Speizer's practice location on file with NPPES is 1100 Trancas St, Napa, CA 94558-2908.
- What is Carl Speizer's phone number?
- The practice phone number listed in the NPPES registry for Carl Speizer is (707) 363-0771.
- Is Carl Speizer's NPI active?
- Yes — Carl Speizer's NPI (1922012947) is active in the NPPES registry as of the last update on 2009-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.