Thomas R Sak, PSYD

Primary specialty

Clinical NeuropsychologistTaxonomy code 103G00000X

Practice address

1451 Merchant Dr
Algonquin, IL 60102-5917

Phone

(847) 469-7537

Fax

(847) 469-7540

NPI assigned

Jul 20, 2018

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Clinical Psychologist

Education

Other, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Thomson Memory Center LLCGroup PAC ID 7113098278, 13 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Thomson Memory Center LLC

  • Clinical Neuropsychologist
  • Algonquin, IL
  • NPI 1124296082
  Medicare reassignment Care Compare group NPD

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1532044800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758585600000",
    "number": "1073090239",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1451 MERCHANT DR",
            "city": "ALGONQUIN",
            "state": "IL",
            "postal_code": "601025917",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1451 MERCHANT DR",
            "city": "ALGONQUIN",
            "state": "IL",
            "postal_code": "601025917",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "420 Lake Cook Rd Ste 112",
            "address_purpose": "LOCATION",
            "city": "Deerfield",
            "state": "IL",
            "postal_code": "600154914",
            "country_code": "US",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "17W662 Butterfield Rd Ste 302",
            "address_purpose": "LOCATION",
            "city": "Oakbrook Terrace",
            "state": "IL",
            "postal_code": "601814006",
            "country_code": "US",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1603 Orrington Ave Ste 600",
            "address_purpose": "LOCATION",
            "city": "Evanston",
            "state": "IL",
            "postal_code": "602013860",
            "country_code": "US",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2300 N Barrington Rd Ste 105",
            "address_purpose": "LOCATION",
            "city": "Hoffman Estates",
            "state": "IL",
            "postal_code": "601692033",
            "country_code": "US",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2551 N Clark St Ste 200",
            "address_purpose": "LOCATION",
            "city": "Chicago",
            "state": "IL",
            "postal_code": "606141798",
            "country_code": "US",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2604 Dempster St Ste 407B",
            "address_purpose": "LOCATION",
            "city": "Park Ridge",
            "state": "IL",
            "postal_code": "600688428",
            "country_code": "US",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1531 S Grove Ave Unit 105",
            "address_purpose": "LOCATION",
            "city": "Barrington",
            "state": "IL",
            "postal_code": "600105250",
            "country_code": "US",
            "telephone_number": "847-469-7537",
            "fax_number": "847-469-7540",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SAK",
        "first_name": "THOMAS",
        "middle_name": "R",
        "name_prefix": "Dr.",
        "credential": "PSYD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-07-20",
        "last_updated": "2025-09-23",
        "certification_date": "2025-09-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103G00000X",
            "taxonomy_group": "",
            "desc": "Clinical Neuropsychologist",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Rosecrans & Associates PLLC
• Megan Dolores Rosecrans
• Nanci Rosenberg-Herman, M.S., LPC
• Melissa Lynn Rudolph, MS, PT
• Kathleen A Ryan Ceisel, PT
• Irina Salabai
• Patricia Fernando Salazar, PT
• Timothy Salley, D.P.M.
• Salud Pediatrics SC
• Johnathan Salvi

• Clinical Neuropsychologist in Algonquin, IL
• Providers in Algonquin, IL by specialty
• Clinical Neuropsychologist in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 23, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.