Individual provider Active NPI

John Angelo Gnassi, MD

  • Family Medicine Physician
  • Parker, AZ
National Provider Identifier
1629066105
Registry record updated Aug 11, 2022
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
74549 Issued in MA
Practice address
12033 Agency Rd
Parker, AZ 85344-7718
Phone
(928) 669-2137
NPI assigned
Oct 10, 2005
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 11, 2022

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X 74549 MA Primary

Addresses

Primary practice location

12033 Agency Rd
Parker, AZ 85344-7718

Mailing address

236 Rainbow Dr # 13625
Livingston, TX 77399-2036
Phone (857) 210-3900

Other practice location 1

103 Garland St
Everett, MA 02149-5066
Phone (617) 389-6270

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA, TX2 enrollments
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 2

Enrollment IDStateProvider typePAC IDDetails
I20050707000337 MA Practitioner - Family Practice 2365488715 Reassigns benefits to 1 organization
I20210119001789 TX Practitioner - HospitalistPractitioner - Family Practice 2365488715 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Hospitalist
Education
Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc), 1988
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

1501 N Williamson Ave
Little Colorado Medical Center
Winslow, AZ 86047-2735
Phone (928) 289-4646

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
DHHS IHS Phoenix Area CurrentSince Dec 1, 2020 Accepting new patients
US Health Dept of Health & Human Services Current Accepting new patients
Dilkon Medical Center CurrentSince Oct 27, 2025 Accepting new patients
DHHS IHS Phoenix Area Current Accepting new patients
Cambridge Public Health Commission CurrentSince Jan 10, 1995 Accepting new patients
Winslow Indian Health Care Center, Inc Current Accepting new patients
Winslow Indian Health Care Center, Inc CurrentSince Oct 27, 2025 Accepting new patients

Locations

12033 Agency Rd
Parker, AZ 85344
Phone (760) 572-4137

500 Indiana Ave
Winslow, AZ 86047

1501 N Williamson Ave
Winslow, AZ 86047
Phone (928) 289-4691

1493 Cambridge St
Cambridge, MA 02139
Phone (617) 665-1185

103 Garland St
Everett, MA 02149
Phone (617) 381-7150

350 Main St
Ste 31
Malden, MA 02148
Phone (781) 397-6583

669 Agency Main St
Harlem, MT 59526
Phone (406) 353-3100

Organizations & group practices 7

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.

NPI Registry JSON

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

{
    "created_epoch": "1128902400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1660176000000",
    "number": "1629066105",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "236 RAINBOW DR # 13625",
            "city": "LIVINGSTON",
            "state": "TX",
            "postal_code": "773992036",
            "telephone_number": "857-210-3900"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "12033 AGENCY RD",
            "city": "PARKER",
            "state": "AZ",
            "postal_code": "853447718",
            "telephone_number": "928-669-2137"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "103 Garland St",
            "address_purpose": "LOCATION",
            "city": "Everett",
            "state": "MA",
            "postal_code": "021495066",
            "country_code": "US",
            "telephone_number": "617-389-6270",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GNASSI",
        "first_name": "JOHN",
        "middle_name": "ANGELO",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-10-10",
        "last_updated": "2022-08-11",
        "certification_date": "2022-08-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "MA",
            "license": "74549",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Parker, AZ

Sources for this page

Verify at the official NPI Registry.