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DR. SEAN C ONEILL O.D.
NPI 1083770341
Optometrist in Chicago, IL

Active since December 29, 2006PECOS Enrolled
100 W RANDOLPH ST UPPR 104, CHICAGO, IL 60601(312) 263-4909(312) 263-4932 Get Directions Write a Review

NPPES record last updated: September 8, 2009. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Sean C Oneill O.d. NPPES

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

DR. SEAN C ONEILL O.D. (NPI 1083770341) is an individual optometrist in Chicago, Illinois, licensed in Illinois (046009017) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1083770341
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. SEAN C ONEILLCredential: O.D.
Location Address100 W RANDOLPH ST UPPR 104Chicago, IL 60601-3219
Mailing Address100 W Randolph St Uppr 104Chicago, IL 60601-3219 · (312) 263-4909 · Fax (312) 263-4932
Phone(312) 263-4909
Fax(312) 263-4932
Sole ProprietorNo
Enumeration DateDecember 29, 2006
Last NPPES UpdateSeptember 8, 2009
✔ NPI 1083770341 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 IL · 046009017
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.
100 W RANDOLPH ST UPPR 104, Chicago, IL 60601
Open in Google Maps ↗

Other Identifiers 3

Medicare PIN999575003
Medicare UPINU94221IL
Medicare PIN999570001

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Blue Cross and Blue Shield of Louisiana 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. Sean C Oneill O.d. 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 Sean Oneill reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Visionworks, Inc.
16 mi
Optometrist
239 GOLF MILL CTR, STE 255
Niles, IL 60714
  • Reassigned Medicare billing, Illinois enrollment
  • 108 clinicians in this Medicare group
NPI 1831115906 (847) 297-2286

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 60601 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
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 Sean Oneill's NPI number?

The NPI number for Sean Oneill is 1083770341. It was assigned to this individual provider in the NPPES registry on December 29, 2006.

Where is Sean Oneill located?

Sean Oneill practices at 100 W Randolph St Uppr 104, Chicago, IL 60601. The listed phone number is (312) 263-4909.

What is Sean Oneill's specialty?

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

Is Sean Oneill enrolled in Medicare?

Yes. Sean Oneill is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sean Oneill's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sean Oneill reassigns Medicare benefits to Visionworks, Inc. (Niles, IL). 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 Sean Oneill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sean Oneill accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Blue Cross Blue Shield of Wyoming, Blue Cross and Blue Shield of Louisiana and Oscar Health list Sean Oneill 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 Sean Oneill was last updated on September 8, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.