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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.

Colbey Ricklefs

Colbey Ricklefs

Colbey Ricklefs

MD

Contact me

Contact me

About me

Insurance plan info

Board Certifications

Primary Source for Verification, Family Medicine
American Board of Pediatrics, Adolescent Medicine
Fellowships

UCSF School of Medicine -GME, Adolescent Medicine
Residencies

University of Washington School of Medicine GME, Family Medicine
Degree

MD, University of Missouri Columbia School of Medicine

Selected research

See all research

Cannabis legalization and early adolescent expectancies: Findings from the adolescent brain cognitive development study.
Drug and alcohol dependence
March 2026
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Social media use, smoking expectancies, and nicotine experimentation in early adolescents: A prospective cohort study.
The American journal on addictions
February 2026
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Social epidemiology of multidimensional sleep health in early adolescence.
Pediatric research
November 2025
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Learning never stops

Our classroom and bedside classes help kids get credit and keep learning during treatment.

See our school program