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

Joann M Timberlake, PA

Individual provider Emergency Medicine Physician · NPI 1043241094

Joann M Timberlake, PA is a Physician Assistant in Orange, California. Graduated from Loma Linda University School of Medicine in 2005, 21 years ago. Practices with Memorial Radiation Oncology Medical, a 5-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
21
Trained at
Loma Linda University School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

1100 W Stewart Dr
Orange, CA 92868-3849
Phone: (714) 633-9111
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence PA18228 (CA)

Record details

NPI number1043241094
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA
Sole proprietorNo
NPI enumeratedJuly 6, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolLOMA LINDA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Memorial Radiation Oncology Medical — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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