Thomas Zimmerman, M.D.
NPI 1295734127 · Emergency Medicine Physician · Grass Valley, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Zimmerman, M.D. is a Emergency Medicine Physician provider in Grass Valley, CA (NPI 1295734127).
Provider details
- NPI number
- 1295734127
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- G34117 (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
20 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
- 2005-07-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Thomas Zimmerman's NPI number?
- Thomas Zimmerman's National Provider Identifier (NPI) is 1295734127, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Zimmerman's specialty?
- Thomas Zimmerman is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Zimmerman located?
- Thomas Zimmerman's practice location on file with NPPES is 155 Glasson Way, Grass Valley, CA 95945-5723.
- What is Thomas Zimmerman's phone number?
- The practice phone number listed in the NPPES registry for Thomas Zimmerman is (530) 274-6001.
- Does Thomas Zimmerman accept Medicare?
- Thomas Zimmerman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Zimmerman's NPI active?
- Yes — Thomas Zimmerman's NPI (1295734127) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.