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DR. WILLIAM KEN SHIOMI OD
NPI 1720058811
Optometrist in Carson, CA

Active since January 23, 2006PECOS Enrolled
20700 S AVALON BLVD, SUITE 343, CARSON, CA 90746(310) 532-2622 Get Directions Write a Review

NPPES record last updated: June 10, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. William Ken Shiomi Od NPPES

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

DR. WILLIAM KEN SHIOMI OD (NPI 1720058811) is an individual optometrist in Carson, California, licensed in California (5335T) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1720058811
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. WILLIAM KEN SHIOMICredential: OD
Location Address20700 S AVALON BLVD, SUITE 343Carson, CA 90746-3701
Mailing Address20700 S Avalon Blvd, Suite 343Carson, CA 90746-3701 · (310) 532-2622
Phone(310) 532-2622
Sole ProprietorYes
Enumeration DateJanuary 23, 2006
Last NPPES UpdateJune 10, 2008
✔ NPI 1720058811 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in CA · 5335T
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
20700 S AVALON BLVD, Carson, CA 90746
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Other Identifiers 2

Medicare UPINT70007CA
Medicare PINOP5335CA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William Ken Shiomi Od 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.

Medicare Billing Reassignment

Medicare enrollment records show William Shiomi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

William K. Shiomi, O.D., Inc
0.1 mi
Optometrist
20700 AVALON BLVD, SUITE #343
Carson, CA 90746
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1477861755 (310) 532-2622

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90746 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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.

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 Shiomi's NPI number?

The NPI number for William Shiomi is 1720058811. It was assigned to this individual provider in the NPPES registry on January 23, 2006.

Where is William Shiomi located?

William Shiomi practices at 20700 S Avalon Blvd Suite 343, Carson, CA 90746. The listed phone number is (310) 532-2622.

What is William Shiomi's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is William Shiomi enrolled in Medicare?

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

Which organization bills Medicare for William Shiomi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Shiomi reassigns Medicare benefits to William K. Shiomi, O.D., Inc (Carson, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Shiomi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Shiomi accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list William Shiomi as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Shiomi was last updated on June 10, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.