Colin Mackay, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

11023241A Issued in IN

Practice address

3700 Washington Ave
Evansville, IN 47714-0541

Phone

(812) 485-4000

NPI assigned

Jun 23, 2023

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in IN

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

Internal Medicine

Education

Other, 2023

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ascension at Home Home health agency, Evansville, IN, CCN 157281
• Ascension St Vincent Evansville Hospital, Evansville, IN, CCN 150100

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Interoperability endpoints

• Direct secure messaging: colin.mackay.1@7598.direct.athenahealth.com
• Direct secure messaging: cmackay237423@direct.deaconess.com

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

• St. Mary'S at Home, LLC

  • Home Health Agency
  • Evansville, IN
  • NPI 1780687061
  Care Compare affiliation
• St. Mary'S Health, Inc.

  • General Acute Care Hospital
  • Evansville, IN
  • NPI 1427082957
  Care Compare affiliation

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

{
    "created_epoch": "1687478400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750896000000",
    "number": "1912683087",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5445 GARDEN CT APT 1B",
            "city": "EVANSVILLE",
            "state": "IN",
            "postal_code": "477155016"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3700 WASHINGTON AVE",
            "city": "EVANSVILLE",
            "state": "IN",
            "postal_code": "477140541",
            "telephone_number": "812-485-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MACKAY",
        "first_name": "COLIN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-06-23",
        "last_updated": "2025-06-26",
        "certification_date": "2025-06-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IN",
            "license": "11023241A",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Genia M Lynn, NP
• James Chadwick Lyon, MSW, LCSW
• Lyttoncarr, Inc.
• Pamela M Ivy-Harris
• Cheryl Lynn Mabern, CPHT
• James C Macke, M.D.
• Samantha Mackey
• Jessica Macleod, MSN, FNP
• Matlyn Alexis Macleod, OTR/L
• Venkatesh Reddy Madadi, MD

• Internal Medicine Physician in Evansville, IN
• Providers in Evansville, IN by specialty
• Internal Medicine Physician in Indiana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 26, 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.