Guillermo Javier Ares Maisonet, MD

Primary specialty

Pediatric Surgery PhysicianTaxonomy code 2086S0120X

License

036139625 Issued in IL

Practice address

2160 S 1St Ave
Maywood, IL 60153-3328

Phone

(708) 216-9000

NPI assigned

Mar 25, 2013

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other names 1

• Guillermo Javier Ares Maisonet Other name

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

General SurgeryAlso: Pediatric Medicine

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Lurie Children'S Medical Group Inc.Group PAC ID 4789597279, 142 clinicians

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.

• Lurie Children'S Medical Group Inc

  • Pediatrics Physician
  • Chicago, IL
  • NPI 1518064716
  Medicare reassignment Care Compare group
• Loyola University Medical Center

  • General Acute Care Hospital
  • Maywood, IL
  • NPI 1376521575
  NPD
• Lurie Children'S Medical Group, LLC

  • Pediatrics Physician
  • Chicago, IL
  • NPI 1992758544
  NPD (past)

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

{
    "created_epoch": "1364169600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787184000000",
    "number": "1942542105",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "225 E CHICAGO AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606112991",
            "telephone_number": "800-543-7362"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2160 S 1ST AVE",
            "city": "MAYWOOD",
            "state": "IL",
            "postal_code": "601533328",
            "telephone_number": "708-216-9000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1900 Silver Cross Blvd",
            "address_purpose": "LOCATION",
            "city": "New Lenox",
            "state": "IL",
            "postal_code": "604519509",
            "country_code": "US",
            "telephone_number": "800-543-7362",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1870 Silver Cross Blvd",
            "address_purpose": "LOCATION",
            "city": "New Lenox",
            "state": "IL",
            "postal_code": "604518639",
            "country_code": "US",
            "telephone_number": "800-543-7362",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "25 N Winfield Rd",
            "address_purpose": "LOCATION",
            "city": "Winfield",
            "state": "IL",
            "postal_code": "601901379",
            "country_code": "US",
            "telephone_number": "800-543-7362",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "225 E Chicago Ave",
            "address_purpose": "LOCATION",
            "city": "Chicago",
            "state": "IL",
            "postal_code": "606112991",
            "country_code": "US",
            "telephone_number": "800-543-7362",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2301 Enterprise Dr",
            "address_purpose": "LOCATION",
            "city": "Westchester",
            "state": "IL",
            "postal_code": "601545802",
            "country_code": "US",
            "telephone_number": "800-543-7362",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1131 Techny Rd",
            "address_purpose": "LOCATION",
            "city": "Northbrook",
            "state": "IL",
            "postal_code": "600625503",
            "country_code": "US",
            "telephone_number": "800-543-7362",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ARES MAISONET",
        "first_name": "GUILLERMO",
        "middle_name": "JAVIER",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2013-03-25",
        "last_updated": "2026-08-20",
        "certification_date": "2026-08-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2086S0120X",
            "taxonomy_group": "",
            "desc": "Surgery, Pediatric Surgery",
            "state": "IL",
            "license": "036139625",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "GUILLERMO",
            "last_name": "ARES MAISONET",
            "middle_name": "JAVIER",
            "credential": "MD",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Alessa P Aragao, MD
• Gerard Aranha, MD
• Rod Marianne Cominguez Arceo-Mendoza, M.D.
• Gabrielle Arellano
• Francene Marie Areopagita, FNP-BC
• Seshank Arimilli
• Taylor Arnason
• Xhulio Arolli
• Alexandra Aronowitz, MD
• Moira Jean Aronson-Brown, MS/CCC SLP

• Pediatric Surgery Physician in Maywood, IL
• Providers in Maywood, IL by specialty
• Pediatric Surgery Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 20, 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.