DR. RANDALL LEE AHN PHD, MLIS
NPI 1093939399
Psychologist - Clinical Child & Adolescent in Fontana, CA

Active since April 11, 2007PECOS Enrolled
16465 SIERRA LAKES PKWY STE 140, FONTANA, CA 92336(909) 244-9593(833) 903-0337 Get Directions Write a Review

NPPES record last updated: May 7, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: May 7, 2024, Feb 14, 2022 (2 updates tracked since 2022).

About Dr. Randall Lee Ahn Phd, Mlis NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. RANDALL LEE AHN PHD, MLIS (NPI 1093939399) is an individual clinical child & adolescent provider in Fontana, California, licensed in California (PSY13956) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1093939399
Entity TypeIndividualMale
Primary Taxonomy103TC2200X
Provider Legal NameDR. RANDALL LEE AHNCredential: PHD, MLIS
Location Address16465 SIERRA LAKES PKWY STE 140Fontana, CA 92336-1242
Mailing Address241 E 17th St # 1029Costa Mesa, CA 92627-3831 · (949) 414-7149
Fax(833) 903-0337
Sole ProprietorYes
Enumeration DateApril 11, 2007
Last NPPES UpdateMay 7, 20242 updates tracked since enumeration
NPPES CertifiedMay 7, 2024
NPI 1093939399 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychologist · Clinical Child & AdolescentBehavioral Health & Social Service Providers
Taxonomy Code103TC2200X
License Licensed in CA · PSY13956
Definition

A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical child psychology is an understanding of the basic psychological needs of children and adolescents, and how the family and other social contexts influence the socio-emotional adjustment, cognitive development, behavioral adaptation and health status of children and adolescents.

16465 SIERRA LAKES PKWY STE 140, Fontana, CA 92336

Secondary Practice Locations 2

Location 13137 Dwight Rd Ste 600Elk Grove, CA 95758-6472 · Phone (909) 244-9593
Location 25201 Great America Pkwy Ste 320Santa Clara, CA 95054-1140 · Phone (323) 205-7088 · Fax (833) 419-0181

Other Identifiers 1

OtherPSY13956CA · Psychology License

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Dr. Randall Lee Ahn Phd, Mlis is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Psychologist (Clinical)
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336
Psychologist
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336
Clinic/Center (Mental Health (Including Community Mental Health Center))
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336
Psychologist (Clinical)
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336
Counselor
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336
Marriage & Family Therapist
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336
Psychologist
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336
Psychologist (Clinical)
16465 SIERRA LAKES PKWY STE 140
FONTANA, CA 92336

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Randall Ahn's NPI number?

The NPI number for Randall Ahn is 1093939399. It was assigned to this individual provider in the NPPES registry on April 11, 2007.

Where is Randall Ahn located?

Randall Ahn practices at 16465 Sierra Lakes Pkwy Ste 140, Fontana, CA 92336. The listed phone number is (909) 244-9593.

What is Randall Ahn's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical Child & Adolescent, with taxonomy code 103TC2200X.

Is Randall Ahn enrolled in Medicare?

Yes. Randall Ahn is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Randall Ahn was last updated on May 7, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.