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

Cynthia Ashbrook

Individual provider Allergy & Immunology Physician · NPI 1386786408

Cynthia Ashbrook is a Family Practice in Walnut Creek, California. Graduated from University of South Carolina School of Medicine in 1987, 39 years ago. Practices with John Muir Physician Network, a 486-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
39
Trained at
University of South Carolina School of Medicine
Licensed in
CA
In the registry since
2007

Practice location Address checks out

1450 Treat Blvd Ste 300
Walnut Creek, CA 94597-2168
Phone: (925) 952-2888
Show map & directions

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

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence G63996 (CA)

Record details

NPI number1386786408
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedFebruary 13, 2007
Last updated in NPPESMay 9, 2017
Mailing address1450 Treat Blvd, Suite 300, Walnut Creek, CA 94597-2168

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF SOUTH CAROLINA SCHOOL OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice John Muir Physician Network — 486 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Walnut Creek