Mark Slapak, RDN

Primary specialty

Registered DietitianTaxonomy code 133V00000X

Practice address

4100 W Slaughter LN Apt 10304
Austin, TX 78749-3994

Phone

(630) 212-1796

NPI assigned

Sep 28, 2026

Last updated

Sep 28, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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

{
    "created_epoch": "1790553600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790553600000",
    "number": "1104739440",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4100 W SLAUGHTER LN APT 10304",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787493994"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4100 W SLAUGHTER LN APT 10304",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787493994",
            "telephone_number": "630-212-1796"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SLAPAK",
        "first_name": "MARK",
        "credential": "RDN",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2026-09-28",
        "last_updated": "2026-09-28",
        "certification_date": "2026-09-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "133V00000X",
            "taxonomy_group": "",
            "desc": "Dietitian, Registered",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Registered Dietitian in Austin, TX
• Providers in Austin, TX by specialty
• Registered Dietitian in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 28, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.