Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Erin Song Duncan, OD

Individual provider Optometrist · NPI 1821191222

Dr. Erin Song Duncan, OD is an Optometry in San Dimas, California. Graduated from State University of New York - State College Optometry in 2002, 24 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
24
Trained at
State University of New York - State College Optometry
Licensed in
CA
In the registry since
2006
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1255 W Arrow Hwy
San Dimas, CA 91773-2340
Phone: (909) 394-5380
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 12152TPA (CA)

Record details

NPI number1821191222
Entity typeIndividual (Type 1)
GenderFemale
Credentials OD
Sole proprietorNo
NPI enumeratedSeptember 7, 2006
Last updated in NPPESSeptember 7, 2022
Certification dateSeptember 7, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolSTATE UNIVERSITY OF NEW YORK - STATE COLLEGE OPTOMETRY
Graduated 2002 (24 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in San Dimas