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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DIANA M REGNERY OD
NPI 1144077496
Optometrist in Downers Grove, IL

Active since May 03, 2024PECOS EnrolledAccepts Medicare Assignment
3450 LACEY RD, DOWNERS GROVE, IL 60515(630) 743-4500(623) 806-7689 Get Directions Write a Review

NPPES record last updated: September 16, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 16, 2026, Jul 8, 2024, May 3, 2024 (3 updates tracked since 2024).

About Diana M Regnery Od NPPES

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

DIANA M REGNERY OD (NPI 1144077496) is an individual optometrist in Downers Grove, Illinois, licensed in Illinois (046011864) and active in the NPI registry since May 2024. She is enrolled in Medicare PECOS and is a graduate of Illinois College Of Optometry At Chicago (2024).

NPPES Registry Identity

NPI1144077496
Entity TypeIndividualFemale
Primary Taxonomy152W00000X
Provider Legal NameDIANA M REGNERYCredential: OD
Location Address3450 LACEY RDDowners Grove, IL 60515-5430
Mailing Address3450 Lacey RdDowners Grove, IL 60515-5430 · (630) 743-4500
Phone(630) 743-4500
Fax(623) 806-7689
Sole ProprietorNo
Medical School CMSIllinois College Of Optometry At ChicagoGraduated 2024
Enumeration DateMay 3, 2024
Last NPPES UpdateSeptember 16, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 16, 2026
✔ NPI 1144077496 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 · 046011864
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.
3450 LACEY RD, Downers Grove, IL 60515
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Louisiana, 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 and accepts Medicare assignment

Diana M Regnery Od is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4284170911
PECOS Enrollment IDI20240718001322
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 Reassignments

6

Medicare enrollment records show Diana Regnery reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ophthalmology Consultants Of Illinois Inc
2.4 mi
Ophthalmology
409 W OGDEN AVE
Westmont, IL 60559
  • Reassigned Medicare billing, Illinois enrollment
  • 5 clinicians in this Medicare group
NPI 1942638549 (630) 964-9800
Six Corners Eye Care LLC
17 mi
Optometrist
4017 N MILWAUKEE AVE
Chicago, IL 60641
  • Reassigned Medicare billing, Illinois enrollment
  • 11 clinicians in this Medicare group
NPI 1629899141 (773) 545-2660
Riverpoint Eye Care LLC
20 mi
Optometrist
1730 W FULLERTON AVE
Chicago, IL 60614
  • Reassigned Medicare billing, Illinois enrollment
  • 10 clinicians in this Medicare group
NPI 1194546614 (773) 327-3000
Melrose Park Eye Care LLC
20 mi
Optometrist
904 W NORTH AVE
Melrose Park, IL 60160
  • Reassigned Medicare billing, Illinois enrollment
  • 21 clinicians in this Medicare group
NPI 1073334595 (708) 343-9009
Old Town Eye Care LLC
21 mi
Optometrist
400 W DIVISION ST STE A
Chicago, IL 60610
  • Reassigned Medicare billing, Illinois enrollment
  • 10 clinicians in this Medicare group
NPI 1861213472 (312) 274-1212
Illinois College Of Optometry
21 mi
Optometrist
3241 S MICHIGAN AVENUE
Chicago, IL 60616
  • Reassigned Medicare billing, Illinois enrollment
  • 143 clinicians in this Medicare group
NPI 1285612390 (312) 225-6200

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 60515 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
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
Established Patient
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
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 20

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

DR. AARLAN VINCENT ACETO OD
Optometrist
3450 LACEY RD
DOWNERS GROVE, IL 60515
Dupage County (630) 743-4807
BEHNAM DARVISHAN DMD
Dentist (General Practice)
3450 LACEY RD
DOWNERS GROVE, IL 60515
Dupage County (630) 743-4500
RITA ANDREJA SINCLAIR PA-C
Physician Assistant
3450 LACEY RD
DOWNERS GROVE, IL 60515
Dupage County (630) 743-7500
DR. KIMBERLY A HUNTINGTON-ALFANO D.O.
Family Medicine
3450 LACEY RD
DOWNERS GROVE, IL 60515
Dupage County (630) 743-4500
MIDWESTERN UNIVERSITY
Speech-Language Pathologist
3450 LACEY RD
DOWNERS GROVE, IL 60515
Dupage County (630) 743-4500
MS. KIMBERLY S HOFFER M.A., CCC-SLP
Speech-Language Pathologist
3450 LACEY RD, ALUMNI HALL 206
DOWNERS GROVE, IL 60515
Dupage County (630) 743-4500
JESSICA N CONROY OD
Optometrist
3450 LACEY RD
DOWNERS GROVE, IL 60515
Dupage County (630) 743-4500
LAUREN MAXON FERGUSON CCC-SLP
Speech-Language Pathologist
3450 LACEY RD
DOWNERS GROVE, IL 60515
Dupage County (630) 743-4500

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 Diana Regnery's NPI number?

The NPI number for Diana Regnery is 1144077496. It was assigned to this individual provider in the NPPES registry on May 3, 2024.

Where is Diana Regnery located?

Diana Regnery practices at 3450 Lacey Rd, Downers Grove, IL 60515. The listed phone number is (630) 743-4500.

What is Diana Regnery's specialty?

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

Is Diana Regnery enrolled in Medicare?

Yes. Diana Regnery is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Diana Regnery's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diana Regnery reassigns Medicare benefits to 6 organizations: Ophthalmology Consultants Of Illinois Inc (Westmont, IL), Six Corners Eye Care LLC (Chicago, IL), Riverpoint Eye Care LLC (Chicago, IL), Melrose Park Eye Care LLC (Melrose Park, IL), Old Town Eye Care LLC (Chicago, IL) and 1 more organization, listed in the Medicare section above. Each 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 Diana Regnery's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Diana Regnery accept?

Health plans from Blue Cross Blue Shield of Wyoming, Blue Cross and Blue Shield of Louisiana, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas and 9 other insurers list Diana Regnery 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 Diana Regnery was last updated on September 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 days 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.