Mark Whitsitt, DPT

Primary specialty

Physical TherapistTaxonomy code 225100000X

License

070023983 Issued in IL

Practice address

573 W. Route 22
Lake Zurich, IL 60047

Phone

(847) 796-3320

Fax

(847) 796-3342

NPI assigned

Sep 12, 2018

Last updated

Oct 3, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

Enrollment records 1

Specialty

Physical Therapist in Private Practice

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Athletic and Therapeutic Institute of Bourbonnais, LLCGroup PAC ID 4183692577, 171 clinicians

Athletic and Therapeutic Institute of Naperville, LLCGroup PAC ID 8325014020, 251 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

85.61 of 100Reported as group

Quality

90

Improvement activities

40

Cost

70.36

Merit-based Incentive Payment System (MIPS)

Final score

86.49 of 100Reported as group

Quality

90

Improvement activities

40

Cost

73.3

Medicare enrollment (NPD)

Enrolled

State licenses

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Athletic and Therapeutic Institute of Bourbonnais, LLC

  dba ATI Physical Therapy

  • Physical Therapist
  • Bourbonnais, IL
  • NPI 1861503542
  Medicare reassignment Care Compare group NPD
• Athletic and Therapeutic Institute of Naperville LLC

  dba ATI Physical Therapy

  • Physical Therapist
  • Aurora, IL
  • NPI 1023129681
  Medicare reassignment Care Compare group NPD
• Athletic & Therapeutic Institute of Bourbonnais, LLC

  dba ATI Physical Therapy

  • Physical Therapist
  • Minooka, IL
  • NPI 1083937056
  NPD
• Athletic and Therapeutic Institute of Bourbonnais, LLC

  • Durable Medical Equipment & Medical Supplies
  • Columbia, IL
  • NPI 1124766696

  Physical Therapist

  NPD
• Athletic and Therapeutic Institute of Naperville, LLC

  • Durable Medical Equipment & Medical Supplies
  • Hazel Crest, IL
  • NPI 1043952641
  NPD

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

{
    "created_epoch": "1536710400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759449600000",
    "number": "1275016511",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2001 BUTTERFIELD RD STE 1600",
            "city": "DOWNERS GROVE",
            "state": "IL",
            "postal_code": "605151211",
            "telephone_number": "630-296-2223"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "573 W. ROUTE 22",
            "city": "LAKE ZURICH",
            "state": "IL",
            "postal_code": "60047",
            "telephone_number": "847-796-3320",
            "fax_number": "847-796-3342"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WHITSITT",
        "first_name": "MARK",
        "credential": "DPT",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-09-12",
        "last_updated": "2025-10-03",
        "certification_date": "2025-10-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "225100000X",
            "taxonomy_group": "",
            "desc": "Physical Therapist",
            "state": "IL",
            "license": "070023983",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Walgreen Co (Walgreens #04464)
• Walgreen Co (Walgreens #02213)
• Walmart Inc.
• Samuel F Walstrum, PT, DPT, ATC
• Allison Wells, M.A., CCC-SLP
• Edwin R. Willgress, M.D.
• Jasmine Williamson
• Wise Speech Connections PLLC
• Melissa Lynn Wise, MS SLP
• Women's Physical Therapy Institute Inc. (Women's Physical Therapy Institute)

• Physical Therapist in Lake Zurich, IL
• Providers in Lake Zurich, IL by specialty
• Physical Therapist in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 3, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.