Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DAVID R DUNCAN M.D.
NPI 1528068459
Emergency Medicine in Grass Valley, CA

Active since July 21, 2005
155 GLASSON WAY, GRASS VALLEY, CA 95945(530) 274-6001 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About David R Duncan M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DAVID R DUNCAN M.D. (NPI 1528068459) is an individual emergency medicine provider in Grass Valley, California, licensed in California (G74891) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1528068459
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDAVID R DUNCANCredential: M.D.
Location Address155 GLASSON WAYGrass Valley, CA 95945-5723
Mailing Address103 Providence Mine Rd, Suite 202Nevada City, CA 95959-2941 · (530) 470-8377 · Fax (530) 470-8906
Sole ProprietorNo
Enumeration DateJuly 21, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1528068459 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License Licensed in CA · G74891
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
155 GLASSON WAY, Grass Valley, CA 95945

Other Identifiers 1

Medicaid00G748910CA

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Anesthesiology
155 GLASSON WAY
GRASS VALLEY, CA 95945
Internal Medicine
155 GLASSON WAY
GRASS VALLEY, CA 95945
Internal Medicine
155 GLASSON WAY
GRASS VALLEY, CA 95945
Internal Medicine
155 GLASSON WAY
GRASS VALLEY, CA 95945
Emergency Medicine
155 GLASSON WAY
GRASS VALLEY, CA 95945
Internal Medicine (Cardiovascular Disease)
155 GLASSON WAY
GRASS VALLEY, CA 95945
Surgery
155 GLASSON WAY
GRASS VALLEY, CA 95945
Hospitalist
155 GLASSON WAY
GRASS VALLEY, CA 95945

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is David Duncan's NPI number?

The NPI number for David Duncan is 1528068459. It was assigned to this individual provider in the NPPES registry on July 21, 2005.

Where is David Duncan located?

David Duncan practices at 155 Glasson Way, Grass Valley, CA 95945. The listed phone number is (530) 274-6001.

What is David Duncan's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

When was this NPI record last updated?

The NPPES record for David Duncan was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.