IndividualActive
David Duncan, M.D.
NPI 1528068459 · Emergency Medicine Physician · Grass Valley, CA
Provider details
- NPI number
- 1528068459
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- G74891 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
155 Glasson Way
Grass Valley, CA 95945-5723
Phone: (530) 274-6001
Street-level locationGet directions
Mailing address
103 Providence Mine Rd
Nevada City, CA 95959-2941
Registry dates
- Enumerated
- 2005-07-21
- Last updated
- 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.