Individual provider Active NPI

Grant Connell Hallock, DO

  • Critical Care Medicine (Internal Medicine) Physician
  • Park Ridge, IL
National Provider Identifier
1225666357
Registry record updated Mar 28, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Critical Care Medicine (Internal Medicine) PhysicianTaxonomy code 207RC0200X
License
036.166239 Issued in IL
Practice address
1775 Dempster St
Park Ridge, IL 60068-1143
Phone
(847) 723-2210
Fax
(847) 723-6987
NPI assigned
Apr 1, 2020
Last updated
Mar 28, 2024By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 28, 2024

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Critical Care Medicine (Internal Medicine) Physician 207RC0200X 036.166239 IL Primary

Addresses

Primary practice location

1775 Dempster St
Park Ridge, IL 60068-1143

Mailing address

1646 River St Unit 701
Des Plaines, IL 60016-8418
Phone (858) 414-0117

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NH
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

Enrollment IDStateProvider typePAC IDDetails
I20250723003878 NH Practitioner - Internal Medicine 0840600425 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
Other, 2020
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Incare LLCGroup PAC ID 1153658851, 62 clinicians
Incare Tufts PLLCGroup PAC ID 3072013192, 49 clinicians

Practice addresses (Care Compare)

166 Kinsley St
Suite 302
Nashua, NH 03060-3676
Phone (978) 519-4114

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
036.166239ILMDCritical Care Medicine (Internal Medicine) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Incare Tufts PLLC CurrentSince Nov 22, 2025 Accepting new patients
Incare LLC CurrentSince Jul 18, 2025 Accepting new patients
St Joseph Hospital of Nashua NH Past Accepting new patients

Locations

565 Turnpike St
Ste 85
North Andover, MA 01845
Phone (978) 519-4114

166 Kinsley St
Ste 302
Nashua, NH 03060
Phone (603) 228-5935

Interoperability endpoints

  • Direct secure messaging: grant.hallock@hca6.eclinicaldirectplus.com
  • FHIR API: https://api.platform.athenahealth.com/18780/brand/1/csg/1/fhir/r4
  • FHIR API: https://fhir4.healow.com/fhir/r4/CFFBDD

Organizations & group practices 3

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.

Hospital & facility affiliations 2

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1585699200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1711584000000",
    "number": "1225666357",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1646 RIVER ST UNIT 701",
            "city": "DES PLAINES",
            "state": "IL",
            "postal_code": "600168418",
            "telephone_number": "858-414-0117"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1775 DEMPSTER ST",
            "city": "PARK RIDGE",
            "state": "IL",
            "postal_code": "600681143",
            "telephone_number": "847-723-2210",
            "fax_number": "847-723-6987"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HALLOCK",
        "first_name": "GRANT",
        "middle_name": "CONNELL",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-04-01",
        "last_updated": "2024-03-28",
        "certification_date": "2023-04-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "IL",
            "license": "036.166239",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Park Ridge, IL

Sources for this page

Verify at the official NPI Registry.