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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.

EUGENE REZNIK PSYD
NPI 1679156111
Clinical Neuropsychologist in Algonquin, IL

Active since May 03, 2021PECOS EnrolledAccepts Medicare Assignment
1451 MERCHANT DR, ALGONQUIN, IL 60102(847) 469-7537(847) 469-7540 Get Directions Write a Review

NPPES record last updated: October 5, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 5, 2026, Aug 14, 2024, May 3, 2021 (3 updates tracked since 2021).

About Eugene Reznik Psyd NPPES

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

EUGENE REZNIK PSYD (NPI 1679156111) is an individual clinical neuropsychologist in Algonquin, Illinois, licensed in Illinois (071.022723) and active in the NPI registry since May 2021. He is enrolled in Medicare PECOS, maintains 7 additional practice locations, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1679156111
Entity TypeIndividualMale
Primary Taxonomy103G00000X
Provider Legal NameEUGENE REZNIKCredential: PSYD
Location Address1451 MERCHANT DRAlgonquin, IL 60102-5917
Mailing Address1451 Merchant DrAlgonquin, IL 60102-5917 · (847) 469-7537 · Fax (847) 469-7540
Phone(847) 469-7537
Fax(847) 469-7540
Sole ProprietorYes
Medical School CMSOtherGraduated 2024
Enumeration DateMay 3, 2021
Last NPPES UpdateOctober 5, 20263 updates tracked since enumeration
NPPES CertifiedOctober 5, 2026
✔ NPI 1679156111 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers
Taxonomy Code103G00000X
License✔ Licensed in IL · 071.022723
Definition
A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PSY10001486 (MA)
1451 MERCHANT DR, Algonquin, IL 60102
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Secondary Practice Locations 7

Location 12551 N Clark St Ste 200Chicago, IL 60614-1798 · Phone (847) 469-7537 · Fax (847) 469-7540
Location 23701 Commercial Ave Ste 9Northbrook, IL 60062-1830 · Phone (847) 469-7537 · Fax (847) 469-7540
Location 31531 S Grove Ave Unit 105Barrington, IL 60010-5250 · Phone (847) 469-7537 · Fax (847) 469-7540
Location 417W662 Butterfield Rd Ste 302Oakbrook Terrace, IL 60181-4006 · Phone (847) 469-7537 · Fax (847) 469-7540
Location 5636 Church St Ste 419Evanston, IL 60201-4580 · Phone (847) 469-7537 · Fax (847) 469-7540
Location 62604 Dempster St Ste 407BPark Ridge, IL 60068-8428 · Phone (847) 469-7537 · Fax (847) 469-7540
Location 72300 N Barrington Rd Ste 105Hoffman Estates, IL 60169-2033 · Phone (847) 469-7537 · Fax (847) 469-7540

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Taro Health.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

Eugene Reznik Psyd 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 ID1052894656
PECOS Enrollment IDI20260311004497
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 Eugene Reznik reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Umass Memorial Medical Group, Inc.
845 mi
Urgent Care
78 SUTTON AVE
Oxford, MA 01540
  • Reassigned Medicare billing, Massachusetts enrollment
  • 2,902 clinicians in this Medicare group
NPI 1982381018 (508) 499-1760

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

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. CHRISTINA JOY BLODGETT PH.D.
Clinical Neuropsychologist
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537
DR. THOMAS R SAK PSYD
Clinical Neuropsychologist
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537
ANTONIO MARTINEZ TLATENCHI PH.D.
Clinical Neuropsychologist
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537
THOMSON MEMORY CENTER, PLLC
Clinical Neuropsychologist
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537
TAYLOR GRECO PSYD
Clinical Neuropsychologist
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537
DR. NICKOLAS ARMSTRONG PSY.D.
Clinical Neuropsychologist
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537
DR. ARINA POLEVOY PSY.D.
Clinical Neuropsychologist
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537
HEATHER PATERSON MA, LPC
Counselor
1451 MERCHANT DR
ALGONQUIN, IL 60102
McHenry County (847) 469-7537

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 Eugene Reznik's NPI number?

The NPI number for Eugene Reznik is 1679156111. It was assigned to this individual provider in the NPPES registry on May 3, 2021.

Where is Eugene Reznik located?

Eugene Reznik practices at 1451 Merchant Dr, Algonquin, IL 60102. The listed phone number is (847) 469-7537.

What is Eugene Reznik's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Is Eugene Reznik enrolled in Medicare?

Yes. Eugene Reznik 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 organization bills Medicare for Eugene Reznik's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Eugene Reznik reassigns Medicare benefits to Umass Memorial Medical Group, Inc. (Oxford, MA). 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 Eugene Reznik's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Eugene Reznik accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Eugene Reznik 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 Eugene Reznik was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.