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Clinics & Locations
Clinics & Locations
Here to serve you

Explore our network of care for kids, from the tiniest to teens and young adults.
Find a Doctor
Find a Doctor
- Find a Doctor
- Get a Second Opinion
World-class docs

We'll help you find the best provider for your child.
Your Visit
Your Visit
Stress-free visits

Accommodations. Admission. Discharge. Procedure prep. We've got you covered.
Patient Education
Patient Education
Extraordinary kid care

Our specialists handle conditions ranging from the common to the most rare.
Medical Professionals
Medical Professionals
Referrals made easy

Contacts and resources to get your patients to our pediatric specialists
Why Choose Us?
Why Choose Us?
Best in Northern CA

We're ranked #1 in pediatric cancer, heart surgery, cardiology & more.

Ryan Ash

Ryan Ash

Ryan Ash

MD

Contact me

Contact me

About me

Telehealth (video visits)

Insurance plan info

Board Certifications

American Board of Psychiatry and Neurology, Psychiatry
Residencies

Stanford University Hospitals & Clinics GME, Psychiatry
Degree

MD, Baylor College of Medicine
Languages

English

Selected research

See all research

Empirical limitations of current low-intensity focused ultrasound simulation platforms.
medRxiv : the preprint server for health sciences
January 2026
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Optimization of MR acoustic radiation force imaging (MR-ARFI) for human transcranial focused ultrasound.
Magnetic resonance in medicine
May 2025
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Stability of steady-state visual evoked potential contrast response functions.
Psychophysiology
August 2023
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Saving future lives

500+ UCSF investigators are researching cures for hundreds of childhood and adult diseases.