DR. THOMAS R SAK PSYD
NPI 1073090239
Clinical Neuropsychologist in Algonquin, IL

Active since July 20, 2018PECOS EnrolledAccepts Medicare Assignment
1451 MERCHANT DR, ALGONQUIN, IL 60102(847) 469-7537(847) 469-7540 Get Directions Write a Review

NPPES record last updated: September 23, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Nov 20, 2024, Aug 3, 2018, Jul 20, 2018 (3 updates tracked since 2018).

  • Individual
  • Male
  • Years of Experience 11
  • Clinical Neuropsychologist
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About THOMAS SAK

This page provides the complete NPI Profile along with additional information for Thomas Sak, a provider established in Algonquin, Illinois with a medical specialization in Clinical Neuropsychologist and more than 11 years of experience. The healthcare provider is registered in the NPI registry with number 1073090239 assigned on July 2018. The practitioner's primary taxonomy code is 103G00000X. The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1073090239 Verify this NPI
Provider Name
DR. THOMAS R SAK PSYD
Gender
Male
Entity Type
Individual
Location Address
1451 MERCHANT DR ALGONQUIN, IL 60102
Location Phone
(847) 469-7537
Location Fax
(847) 469-7540
Mailing Address
1451 MERCHANT DR ALGONQUIN, IL 60102
Mailing Phone
(847) 469-7537
Mailing Fax
(847) 469-7540
Medical School Name
OTHER
Graduation Year
2016
Is Sole Proprietor?
No
Enumeration Date
07-20-2018
Last Update Date
09-23-2025
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Location Map

Secondary Locations

  • 1603 Orrington Ave Ste 600
    Evanston, IL 60201
    (847) 469-7537
  • 420 Lake Cook Rd Ste 112
    Deerfield, IL 60015
    (847) 469-7537
  • 1531 S Grove Ave Unit 105
    Barrington, IL 60010
    (847) 469-7537
  • 2604 Dempster St Ste 407B
    Park Ridge, IL 60068
    (847) 469-7537
  • 2551 N Clark St Ste 200
    Chicago, IL 60614
    (847) 469-7537
  • 17W662 Butterfield Rd Ste 302
    Oakbrook Terrace, IL 60181
    (847) 469-7537
  • 2300 N Barrington Rd Ste 105
    Hoffman Estates, IL 60169
    (847) 469-7537

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Clinical Neuropsychologist

Taxonomy Code
103G00000X
Type
Behavioral Health & Social Service Providers
Taxonomy Description
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.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1103T00000XBehavioral Health & Social Service Providers

Psychologist

 

Medicare Participation & PECOS Enrollment Status

Thomas Sak is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Thomas Sak is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging and Durable Medical Equipment (DME).

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 446771786

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20250304000746

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): No

  • Eligible to Order or Refer Power Mobility Devices: No

Reviews for DR. THOMAS R SAK PSYD

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Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Chiropractor
1451 MERCHANT DR
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Clinical Neuropsychologist
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Counselor
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Psychologist (Clinical)
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Clinical Neuropsychologist
1451 MERCHANT DR
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Clinical Neuropsychologist
1451 MERCHANT DR
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Clinical Neuropsychologist
1451 MERCHANT DR
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Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1073090239, enumerated as an "individual" on July 20, 2018.

The provider is located at 1451 MERCHANT DR ALGONQUIN, IL 60102 and the phone number is (847) 469-7537.

Clinical Neuropsychologist with taxonomy code 103G00000X.