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

Dr. Pei Casas, MD

Individual provider Family Medicine Physician · NPI 1922234236

Dr. Pei Casas, MD is a Family Practice in Walnut Creek, California. Graduated from University of Southern California Keck School of Medicine in 2007, 19 years ago. Practices with Permanente Medical Group Inc, a 10,941-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
19
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2009
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

320 Lennon Ln
Walnut Creek, CA 94598-2419
Phone: (925) 906-2327
Fax: (925) 906-2327
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

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A107610 (CA)

Record details

NPI number1922234236
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 2, 2009
Last updated in NPPESFebruary 11, 2022
Mailing address320 Lennon Ln, Walnut Creek, CA 94598-2419

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Permanente Medical Group Inc — 10941 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Walnut Creek