Maria Holstrom-Mercader

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

036.178321 Issued in IL

Practice address

801 S Milwaukee Ave
Libertyville, IL 60048-3204

Phone

(847) 362-2900

NPI assigned

May 12, 2023

Sex

Female

Sole proprietor

Yes

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

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Emergency Medicine

Education

Pennsylvania State University College of Medicine, 2023

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Carle Health Care Incorporated

  • Internal Medicine Physician
  • Urbana, IL
  • NPI 1154653947

  Emergency Medicine

  Medicare reassignment NPD

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

{
    "created_epoch": "1683849600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781740800000",
    "number": "1306536339",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "801 S MILWAUKEE AVE",
            "city": "LIBERTYVILLE",
            "state": "IL",
            "postal_code": "600483204",
            "telephone_number": "847-362-2900"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "801 S MILWAUKEE AVE",
            "city": "LIBERTYVILLE",
            "state": "IL",
            "postal_code": "600483204",
            "telephone_number": "847-362-2900"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOLSTROM-MERCADER",
        "first_name": "MARIA",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2023-05-12",
        "last_updated": "2026-06-18",
        "certification_date": "2026-06-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "IL",
            "license": "036.178321",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Catherine Lerose Hoffner, D.M.D.
• Mary Clare Hogan
• Katie Holley, LPC
• Holly C Bosier Licensed Clinical Professional Counselor PC
• Darlene Mary Holop, RDN
• Holverson Therapeutics, LLC
• Home Care With Dignity
• David Wang Honey, DMD
• Jonathan L Hook, D.P.M.
• Emily Horecny, APRN

• Emergency Medicine Physician in Libertyville, IL
• Providers in Libertyville, IL by specialty
• Emergency Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 18, 2026; 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.