NPIMap

Individual provider Active NPI

Katherine Madison Macmillan, M.D.

  • Gastroenterology Physician
  • Simpsonville, SC
National Provider Identifier
1780117416
Registry record updated Feb 23, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
85580 Issued in SC
Practice address
741 SE Main St
Simpsonville, SC 29681-3237
Phone
(864) 522-8420
Fax
(864) 522-8425
NPI assigned
Apr 10, 2017
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 23, 2026

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

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 85580 SC
Internal Medicine Physician 207R00000X 009641 GA
Gastroenterology Physician 207RG0100X 72379 AZ
Gastroenterology Physician 207RG0100X 85580 SC Primary

Addresses

Primary practice location

741 SE Main St
Simpsonville, SC 29681-3237

Mailing address

300 E McBee Ave Ste 300
Greenville, SC 29601-2899
Phone (864) 522-8603

Other practice location 1

727 SE Main St Ste 340
Simpsonville, SC 29681-3249
Phone (864) 455-2888

Other practice location 2

13400 E Shea Blvd
Scottsdale, AZ 85259-5499
Phone (480) 301-8000

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in AZ, SC2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20240711002081 AZ Practitioner - Gastroenterology 8426312141 Reassigns benefits to 1 organization
I20250616002806 SC Practitioner - GastroenterologyPractitioner - Internal Medicine 8426312141 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Other, 2017
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Prisma Health University Medical GroupGroup PAC ID 8325950983, 2,467 clinicians

Practice addresses (Care Compare)

727 S E Main St
Suite 340
Simpsonville, SC 29681-9769
Phone (864) 455-2888

Hospital & facility affiliations

  • Prisma Health Greenville Memorial Hospital Hospital, Greenville, SC, CCN 420078
  • Prisma Health Hillcrest Hospital Hospital, Simpsonville, SC, CCN 420037
  • Prisma Health Patewood Hospital Hospital, Greenville, SC, CCN 420102
  • Prisma Health Baptist Easley Hospital Hospital, Easley, SC, CCN 420015
  • Prisma Health Laurens County Hospital Hospital, Clinton, SC, CCN 420038
  • Prisma Health North Greenville Ltach Long-term care hospital, Travelers Rest, SC, CCN 422008

Merit-based Incentive Payment System (MIPS)

Final score
86.47 of 100Reported as group
Quality
78.27
Promoting interoperability
100
Improvement activities
40
Cost
76.62

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy40
Upper gastrointestinal (GI) endoscopy for acid reflux88

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
72379AZMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Mayo Clinic Arizona CurrentSince Jul 1, 2024 Accepting new patients
Prisma Health University Medical Group Internal Medicine CurrentSince Jul 28, 2025 Accepting new patients
Southland Emergency Medical Services Consolidated, LLC Internal Medicine CurrentSince Jun 9, 2020 Accepting new patients
Mayo Clinic Arizona CurrentSince Jul 1, 2024 Accepting new patients
Southland Cochran Emergency Medical Services, LLC CurrentSince Nov 25, 2019 Accepting new patients
Prisma Health University Medical Group CurrentSince Jul 28, 2025 Accepting new patients

Locations

13400 E Shea Blvd
Scottsdale, AZ 85259

145 E Peacock St
Cochran, GA 31014
Phone (229) 200-4950

210 Freeman Farm Rd
Duncan, SC 29334
Phone (864) 968-5123

300 E McBee Ave
Ste 300
Greenville, SC 29601

741 SE Main St
Simpsonville, SC 29681
Phone (864) 228-8453

727 SE Main St
Ste 340
Simpsonville, SC 29681
Phone (864) 455-2888

Interoperability endpoints

  • Direct secure messaging: kkendrick510264@direct.ghs.myhfn.org

Organizations & group practices 6

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.

Hospital & facility affiliations 55

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

View all 55

NPI Registry JSON

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

{
    "created_epoch": "1491782400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771804800000",
    "number": "1780117416",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 E MCBEE AVE STE 300",
            "city": "GREENVILLE",
            "state": "SC",
            "postal_code": "296012899",
            "telephone_number": "864-522-8603"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "741 SE MAIN ST",
            "city": "SIMPSONVILLE",
            "state": "SC",
            "postal_code": "296813237",
            "telephone_number": "864-522-8420",
            "fax_number": "864-522-8425"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "727 SE Main St Ste 340",
            "address_purpose": "LOCATION",
            "city": "Simpsonville",
            "state": "SC",
            "postal_code": "296813249",
            "country_code": "US",
            "telephone_number": "864-455-2888",
            "fax_number": "864-455-2885",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "13400 E Shea Blvd",
            "address_purpose": "LOCATION",
            "city": "Scottsdale",
            "state": "AZ",
            "postal_code": "852595499",
            "country_code": "US",
            "telephone_number": "480-301-8000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MACMILLAN",
        "first_name": "KATHERINE",
        "middle_name": "MADISON",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2017-04-10",
        "last_updated": "2026-02-23",
        "certification_date": "2026-02-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "SC",
            "license": "85580",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "GA",
            "license": "009641",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "AZ",
            "license": "72379",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "SC",
            "license": "85580",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Simpsonville, SC

Sources for this page

Verify at the official NPI Registry.