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DR. ASHLEY G. WILLIAMS MD
NPI 1659766640
Family Medicine in Fullerton, CA

Active since April 06, 2015PECOS Enrolled
800 N STATE COLLEGE BLVD, FULLERTON, CA 92831(657) 278-2800 Get Directions Write a Review

NPPES record last updated: March 18, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 18, 2025, May 6, 2021 (2 updates tracked since 2021).

About Dr. Ashley G. Williams Md NPPES

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

DR. ASHLEY G. WILLIAMS MD (NPI 1659766640) is an individual family medicine provider in Fullerton, California, licensed in California (A198565) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1659766640
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. ASHLEY G. WILLIAMSCredential: MD
Location Address800 N STATE COLLEGE BLVDFullerton, CA 92831-3599
Mailing Address800 N State College BlvdFullerton, CA 92831-3599 · (657) 278-2800
Phone(657) 278-2800
Sole ProprietorNo
Enumeration DateApril 6, 2015
Last NPPES UpdateMarch 18, 20252 updates tracked since enumeration
NPPES CertifiedMarch 18, 2025
✔ NPI 1659766640 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A198565
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
800 N STATE COLLEGE BLVD, Fullerton, CA 92831
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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. Ashley G. Williams Md 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92831 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

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

SHRENA DESAI
Student in an Organized Health Care Education/Training Program
800 N STATE COLLEGE BLVD
FULLERTON, CA 92831
Orange County (657) 278-2011
CAL STATE UNIVERSITY FULLERTON
Clinic/Center (Health Service)
800 N STATE COLLEGE BLVD
FULLERTON, CA 92831
Orange County (714) 278-2880
MS. VIVIAN V FEARS RN
Registered Nurse (College Health)
800 N STATE COLLEGE BLVD
FULLERTON, CA 92831
Orange County (714) 278-2813
MISS MADISON TAYLOR MANER
Specialist/Technologist (Athletic Trainer)
800 N STATE COLLEGE BLVD
FULLERTON, CA 92831
Orange County (657) 278-2011
SOPHIA REYNOSO
Student in an Organized Health Care Education/Training Program
800 N STATE COLLEGE BLVD
FULLERTON, CA 92831
Orange County (657) 278-2011
MISS TRICIA MIKIKO KASAMATSU ATC
Specialist/Technologist (Athletic Trainer)
800 N STATE COLLEGE BLVD, ATTN: KINESIOLOGY
FULLERTON, CA 92831
Orange County (657) 278-7206
DR. KAREN LEE PERELL PHD, RKT
Kinesiotherapist
800 N STATE COLLEGE BLVD
FULLERTON, CA 92831
Orange County (714) 278-4384
MS. PATRICIA EILEEN CATANZARO NP
Nurse Practitioner (Family)
800 N STATE COLLEGE BLVD
FULLERTON, CA 92831
Orange County (714) 278-2800

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 Ashley Williams's NPI number?

The NPI number for Ashley Williams is 1659766640. It was assigned to this individual provider in the NPPES registry on April 6, 2015.

Where is Ashley Williams located?

Ashley Williams practices at 800 N State College Blvd, Fullerton, CA 92831. The listed phone number is (657) 278-2800.

What is Ashley Williams's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Ashley Williams enrolled in Medicare?

Yes. Ashley Williams is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ashley Williams was last updated on March 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.