Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Thomas R Sak, PSYD

Individual provider Clinical Neuropsychologist · NPI 1073090239

Dr. Thomas R Sak, PSYD is a Clinical Psychologist in Algonquin, Illinois. Qualified in 2016, 10 years ago. Practices with Thomson Memory Center LLC, a 13-clinician group, works from 8 locations, accepts Medicare assignment and offers telehealth.

Years since qualifying
10
In the registry since
2018
Specialties on file
2
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

See every abbreviation used in this directory →

Practice location Address checks out

1451 Merchant Dr
Algonquin, IL 60102-5917
Phone: (847) 469-7537
Fax: (847) 469-7540
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (7)

  • 1531 S Grove Ave Unit 105, Barrington, IL 60010-5250 — (847) 469-7537
  • 2551 N Clark St Ste 200, Chicago, IL 60614-1798 — (847) 469-7537
  • 420 Lake Cook Rd Ste 112, Deerfield, IL 60015-4914 — (847) 469-7537
  • 1603 Orrington Ave Ste 600, Evanston, IL 60201-3860 — (847) 469-7537
  • 2300 N Barrington Rd Ste 105, Hoffman Estates, IL 60169-2033 — (847) 469-7537
  • 17w662 Butterfield Rd Ste 302, Oakbrook Terrace, IL 60181-4006 — (847) 469-7537
  • 2604 Dempster St Ste 407b, Park Ridge, IL 60068-8428 — (847) 469-7537

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X
Psychologist Taxonomy 103T00000X

Record details

NPI number1073090239
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorNo
NPI enumeratedJuly 20, 2018
Last updated in NPPESSeptember 23, 2025
Certification dateSeptember 23, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Thomson Memory Center Llc — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Algonquin