Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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MS. Barbara Ayres Ball Trask, PA

Individual provider Surgical Physician Assistant · NPI 1417284233

MS. Barbara Ayres Ball Trask, PA is a Surgical Physician Assistant in San Francisco, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2009
Specialties on file
2
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

2 Embarcadero Ctr Lbby Level
San Francisco, CA 94111-3823
Phone: (415) 578-3100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Physician Assistant (primary) Taxonomy 363AM0700X · Licence PA 15470 (CA)
Surgical Physician Assistant Taxonomy 363AS0400X · Licence PA 15470 (CA)

Record details

NPI number1417284233
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA
Sole proprietorYes
NPI enumeratedNovember 16, 2009
Last updated in NPPESJune 19, 2020
Certification dateJune 19, 2020

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