1. Home
  2. Directory
  3. California
  4. Redlands
  5. Physician Assistant
  6. NPI Profile

WILLIAM AUGUST DIEZ JR. PA-C
NPI 1780054858
Physician Assistant in Redlands, CA

Active since October 01, 2015PECOS Enrolled
330 ALABAMA ST STE D, REDLANDS, CA 92373(855) 901-0911 Get Directions Write a Review

NPPES record last updated: September 28, 2022. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 28, 2022, Oct 1, 2015 (2 updates tracked since 2015).

About William August Diez Jr. Pa-c NPPES

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

WILLIAM AUGUST DIEZ JR. PA-C (NPI 1780054858) is an individual physician assistant in Redlands, California, licensed in California (53022) and active in the NPI registry since October 2015. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1780054858
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameWILLIAM AUGUST DIEZ JR.Credential: PA-C
Location Address330 ALABAMA ST STE DRedlands, CA 92373-8097
Mailing Address10969 Tolls LnLoma Linda, CA 92354-6532 · (951) 543-5420
Phone(855) 901-0911
Sole ProprietorYes
Enumeration DateOctober 1, 2015
Last NPPES UpdateSeptember 28, 20222 updates tracked since enumeration
NPPES CertifiedSeptember 28, 2022
✔ NPI 1780054858 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in CA · 53022
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Also ListedPhysician Assistant · MedicalTaxonomy 363AM0700X
330 ALABAMA ST STE D, Redlands, CA 92373
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William August Diez Jr. Pa-c 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 92373 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
$91.88 typical visit price
range $59.60 – $179.42
Typical copayment $22.97 (range $14.90 – $44.85)
Most-billed visit code 99203
Established Patient
$74.08 typical visit price
range $19.37 – $146.42
Typical copayment $18.52 (range $4.84 – $36.60)
Most-billed visit code 99213
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

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

MRS. RACHEL RAFELIA LEWIS FNP
Nurse Practitioner (Family)
330 ALABAMA ST STE D
REDLANDS, CA 92373
San Bernardino County (855) 901-0911

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 William Diez's NPI number?

The NPI number for William Diez is 1780054858. It was assigned to this individual provider in the NPPES registry on October 1, 2015.

Where is William Diez located?

William Diez practices at 330 Alabama St Ste D, Redlands, CA 92373. The listed phone number is (855) 901-0911.

What is William Diez's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is William Diez enrolled in Medicare?

Yes. William Diez is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for William Diez was last updated on September 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.