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

Dr. Randall Lee Ahn, PHD, MLIS

Individual provider Clinical Child & Adolescent Psychologist · NPI 1093939399

Dr. Randall Lee Ahn, PHD, MLIS is a Clinical Child & Adolescent Psychologist in Fontana, California. Practices as a sole proprietor and works from 3 locations. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

16465 Sierra Lakes Pkwy Ste 140
Fontana, CA 92336-1242
Phone: (909) 244-9593
Fax: (833) 903-0337
Show map & directions

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

Additional practice locations (2)

  • 3137 Dwight Rd Ste 600, Elk Grove, CA 95758-6472 — (909) 244-9593
  • 5201 Great America Pkwy Ste 320, Santa Clara, CA 95054-1140 — (323) 205-7088

Specialties & licences

Clinical Child & Adolescent Psychologist (primary) Taxonomy 103TC2200X · Licence PSY13956 (CA)

Record details

NPI number1093939399
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD , MLIS
Sole proprietorYes
NPI enumeratedApril 11, 2007
Last updated in NPPESMay 7, 2024
Certification dateMay 7, 2024
Mailing address241 E 17th St # 1029, Costa Mesa, CA 92627-3831