Marcus Holt Hayner

Primary specialty

Ambulatory Care PharmacistTaxonomy code 1835P2201X

License

0024529 Issued in CO

Practice address

500 W William Cannon Dr Ste 400
Austin, TX 78745-5879

Phone

(866) 278-8432

NPI assigned

Aug 15, 2022

Sex

Male

Sole proprietor

Yes

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

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

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

{
    "created_epoch": "1660521600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788393600000",
    "number": "1144958323",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "500 W WILLIAM CANNON DR STE 400",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787455879",
            "telephone_number": "866-278-8432"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "500 W WILLIAM CANNON DR STE 400",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787455879",
            "telephone_number": "866-278-8432"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "825 E Rundberg Ln Ste E",
            "address_purpose": "LOCATION",
            "city": "Austin",
            "state": "TX",
            "postal_code": "787534813",
            "country_code": "US",
            "telephone_number": "888-478-8432",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HAYNER",
        "first_name": "MARCUS",
        "middle_name": "HOLT",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-08-15",
        "last_updated": "2026-09-03",
        "certification_date": "2026-09-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1835P2201X",
            "taxonomy_group": "",
            "desc": "Pharmacist, Ambulatory Care",
            "state": "CO",
            "license": "0024529",
            "primary": true
        },
        {
            "code": "183500000X",
            "taxonomy_group": "",
            "desc": "Pharmacist",
            "state": "TX",
            "license": "75912",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• William Byron Hayes III, LCMT, HHP
• Kayla Bercegeay Haygood, LMSW
• Rebecca Bowers Hayhurst, LCSW
• Russell A Hayhurst, M.D.
• Daniela Hayn
• Camryn Haynes Aelvoet, RD
• Alex Bernard Haynes, MD, MPH
• Cristina M Haynes, PT
• Indigo Haynes
• Marvi Arredondo Haynes, LMFT-A

• Ambulatory Care Pharmacist in Austin, TX
• Providers in Austin, TX by specialty
• Ambulatory Care Pharmacist in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 3, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.