Colby T Chastain, M.D.

Primary specialty

Diagnostic Radiology PhysicianTaxonomy code 2085R0202X

License

047968 Issued in GA

Practice address

200 W Academy Street
Gainesville, GA 30501

Phone

(770) 282-8820

NPI assigned

May 5, 2006

Last updated

Sep 23, 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

Other identifiers 4

Medicare fee-for-service enrollment

Enrolled in GA, SC2 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

Specialty

Diagnostic Radiology

Education

Medical College of Georgia School of Medicine, 1998

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Gainesville Radiology Group PCGroup PAC ID 9335046382, 65 clinicians

Atlantic Radiology Associates LLCGroup PAC ID 5799706032, shared by 2 NPIs, 92 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northeast Georgia Medical Center, Inc Hospital, Gainesville, GA, CCN 110029
• Savannah Health Services LLC Dba Memorial Health University Medical Center Hospital, Savannah, GA, CCN 110036
• Novant Health Hilton Head Medical Center Hospital, Hilton Head Island, SC, CCN 420080
• Coastal Carolina Hospital Hospital, Hardeeville, SC, CCN 420101
• Memorial Health Meadows Hospital Hospital, Vidalia, GA, CCN 110128

Merit-based Incentive Payment System (MIPS)

Final score

75 of 100Reported as individual

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations (25 of 29)

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.

• Gainesville Radiology Group, PC

  • Diagnostic Radiology Physician
  • Gainesville, GA
  • NPI 1922037605
  Medicare reassignment Care Compare group NPD
• Atlantic Radiology Associates, LLC

  • Diagnostic Radiology Physician
  • Savannah, GA
  • NPI 1033136080
  Medicare reassignment NPD
• The Longstreet Clinic, PC

  • Internal Medicine Physician
  • Gainesville, GA
  • NPI 1326019977
  Medicare reassignment NPD
• Atlantic Radiology Associates LLC

  • Diagnostic Radiology Physician
  • Hilton Head, SC
  • NPI 1922338656
  Medicare reassignment NPD
• Atlantic Radiology Associates, LLC

  dba Eisenhower Imaging Center

  • Diagnostic Radiology Physician
  • Savannah, GA
  • NPI 1164397378
  NPD
• The Longstreet Clinic PC

  • Prosthetic/Orthotic Supplier
  • Gainesville, GA
  • NPI 1053422428
  NPD
• Atlantic Radiology Associates LLC

  • Diagnostic Radiology Physician
  • Hilton Head, SC
  • NPI 1538484803
  NPD
• Northeast Georgia Medical Center, Inc.

  • General Acute Care Hospital
  • Gainesville, GA
  • NPI 1427055821
  NPD (past)
• Shands Teaching Hospital and Clinics Inc

  • Pharmacy
  • Gainesville, FL
  • NPI 1497645915
  NPD (past)

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

• Northeast Georgia Medical Center, Inc.

  • General Acute Care Hospital
  • Gainesville, GA
  • NPI 1427055821
  Care Compare affiliation
• Savannah Health Services, LLC

  dba Memorial Health University Medical Center

  • General Acute Care Hospital
  • Savannah, GA
  • NPI 1053824292
  Care Compare affiliation
• Vidalia Health Services, LLC

  • General Acute Care Hospital
  • Vidalia, GA
  • NPI 1790376564
  Care Compare affiliation
• Hilton Head Medical Center LLC

  dba Novant Health Hilton Head Medical Center

  • General Acute Care Hospital
  • Hilton Head Island, SC
  • NPI 1902675101
  Care Compare affiliation
• South Carolina Coastal Medical Center LLC

  dba Novant Health Coastal Carolina Hospital

  • General Acute Care Hospital
  • Hardeeville, SC
  • NPI 1205605409
  Care Compare affiliation

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

{
    "created_epoch": "1146787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758585600000",
    "number": "1922056217",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 2417",
            "city": "GAINESVILLE",
            "state": "GA",
            "postal_code": "305032417",
            "telephone_number": "770-532-9936",
            "fax_number": "770-534-9877"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 W ACADEMY STREET",
            "city": "GAINESVILLE",
            "state": "GA",
            "postal_code": "30501",
            "telephone_number": "770-282-8820"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "655 Jesse Jewell Pkwy SE",
            "address_purpose": "LOCATION",
            "city": "Gainesville",
            "state": "GA",
            "postal_code": "305013756",
            "country_code": "US",
            "telephone_number": "770-718-1122",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1270 Friendship Rd",
            "address_purpose": "LOCATION",
            "city": "Braselton",
            "state": "GA",
            "postal_code": "305175630",
            "country_code": "US",
            "telephone_number": "770-718-1122",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "801 Austin Dr",
            "address_purpose": "LOCATION",
            "city": "Demorest",
            "state": "GA",
            "postal_code": "305354513",
            "country_code": "US",
            "telephone_number": "770-718-1122",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "835 Austin Dr",
            "address_purpose": "LOCATION",
            "city": "Demorest",
            "state": "GA",
            "postal_code": "305354513",
            "country_code": "US",
            "telephone_number": "770-718-1122",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "725 Jesse Jewell Pkwy SE",
            "address_purpose": "LOCATION",
            "city": "GAINESVILLE",
            "state": "GA",
            "postal_code": "305013834",
            "country_code": "US",
            "telephone_number": "770-718-1122",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CHASTAIN",
        "first_name": "COLBY",
        "middle_name": "T",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-05",
        "last_updated": "2025-09-23",
        "certification_date": "2025-09-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "GA",
            "license": "047968",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "526093704B",
            "state": "GA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "526093704E",
            "state": "GA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICARE GRP PROV #",
            "identifier": "581177261A",
            "state": "GA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "P00157893",
            "state": "GA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

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• Diagnostic Radiology Physician in Gainesville, GA
• Providers in Gainesville, GA by specialty
• Diagnostic Radiology Physician in Georgia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 23, 2025; 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.