Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1073090239 Individual Practitioner Male Practitioner

Dr. Thomas R Sak , PsyD

Clinical Neuropsychologist • Algonquin, IL

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Thomas Sak, PsyD is a certified Clinical Neuropsychologist practicing in Algonquin, IL. With approximately 10 years of clinical experience since completing medical education in 2016, Dr. Sak delivers high-quality medical care to the local community at 1451 MERCHANT DR.

Dr. Sak is affiliated with Thomson Memory Center Llc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Practice Location & Contact Primary Location

Practice Address

1451 Merchant Dr

Algonquin, IL 601025917

Telephone 8474697537
Fax 8474697540
Associated Practice Facility / Clinic
🏢 Family Wellness Care Facility NPI 1336357854

Medicare Profile & Education

Medical School

Other

Graduation Year

2016

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Clinical Neuropsychologist in Algonquin, IL

Established Specialist (10-20 Yrs)
Practitioner Clinical Experience
10 Yrs +0.9 yrs vs City Avg
City Avg: 9.1 Yrs
State Avg: 18.9 Yrs
Regional Practice Density
13 Specialists

Practicing in Algonquin, IL (262 Statewide)

Telehealth Adoption Rate
84.6% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Sak (10 Years) 10 Yrs
Algonquin Specialty Average (9.1 Years) 9.1 Yrs

Medical Specialties & State Licenses

CMS Verified: 2025-09-23
Clinical Neuropsychologist Primary Specialty

NUCC Taxonomy Code: 103G00000X

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.

Psychologist

NUCC Taxonomy Code: 103T00000X

A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.

Hospital & Practice Group Affiliations

Thomson Memory Center Llc

2551 N Clark St, Chicago, IL 606141705

Phone: 8474697537

Secondary Practice Locations

420 Lake Cook Rd Ste 112

Deerfield, IL 600154914

Phone: 8474697537

17w662 Butterfield Rd Ste 302

Oakbrook Terrace, IL 601814006

Phone: 8474697537

1603 Orrington Ave Ste 600

Evanston, IL 602013860

Phone: 8474697537

2300 N Barrington Rd Ste 105

Hoffman Estates, IL 601692033

Phone: 8474697537

2551 N Clark St Ste 200

Chicago, IL 606141798

Phone: 8474697537

1531 S Grove Ave Unit 105

Barrington, IL 600105250

Phone: 8474697537

2604 Dempster St Ste 407b

Park Ridge, IL 600688428

Phone: 8474697537

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

19 Associated Practitioners
Dr. Christina Blodgett , PhD

Clinical Neuropsychologist

NPI 1003092008

Doctor of Philosophy (Ph.D.)

Dr. Antonio Martinez Tlatenchi , PhD

Clinical Neuropsychologist

NPI 1073295549

Doctor of Philosophy (Ph.D.)

Dr. Taylor Greco , PsyD

Clinical Neuropsychologist

NPI 1194202242

Doctor of Psychology (Psy.D.)

Dr. Calsey Fasching , PsyD

Clinical Neuropsychologist

NPI 1194232975

Doctor of Psychology (Psy.D.)

Dr. Nickolas Armstrong , PsyD

Clinical Neuropsychologist

NPI 1205443975

Doctor of Psychology (Psy.D.)

Dr. Arina Polevoy , PsyD

Clinical Neuropsychologist

NPI 1245774157

Doctor of Psychology (Psy.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

9 Historical Events
📍
Updated Practice Location November 20, 2024

Registered at 1451 MERCHANT DR, ALGONQUIN, IL 601025917 (Tel: 8474697537)

📍
Updated Business Mailing Address November 20, 2024

Registered at 1451 MERCHANT DR, ALGONQUIN, IL 601025917 (Tel: 8474697537)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) November 20, 2024

Clinical Neuropsychologist

NPI Profile Active August 03, 2018

NPI status registered as active in NPPES database

📍
Updated Practice Location August 03, 2018

Registered at 618 LIBRARY PL, EVANSTON, IL 60201 (Tel: 8477334300)

📍
Updated Business Mailing Address August 03, 2018

Registered at 618 LIBRARY PL, EVANSTON, IL 602012908

👤
Provider Name / Credentials Updated August 03, 2018

Recorded as THOMAS SAK, PSYD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) August 03, 2018

Psychologist

🟢
Initial NPI Registration & Enumeration July 20, 2018

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1073090239
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: July 20, 2018
Last Update: September 23, 2025
Sole Proprietor: No

Mailing Address

1451 Merchant Dr

Algonquin, IL 601025917

Phone: 8474697537

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.