Margaret Sullivan Holladay, M.C.D, CCC-SLP

Primary specialty

Speech-Language PathologistTaxonomy code 235Z00000X

License

4156 Issued in AL

Practice address

107 Governors Dr SW Unit 101
Huntsville, AL 35801-4326

Phone

(256) 265-7952

NPI assigned

Dec 17, 2018

Sex

Female

Sole proprietor

No

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

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

Locations

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.

• Madison Speech LLC

  • Speech-Language Pathologist
  • Madison, AL
  • NPI 1336773738
  NPD
• Madison Speech Associates, Inc

  • Speech-Language Pathologist
  • Madison, AL
  • NPI 1942400387
  NPD (past)

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

{
    "created_epoch": "1545004800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768694400000",
    "number": "1821569831",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "107 GOVERNORS DR SW UNIT 101",
            "city": "HUNTSVILLE",
            "state": "AL",
            "postal_code": "358014326"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "107 GOVERNORS DR SW UNIT 101",
            "city": "HUNTSVILLE",
            "state": "AL",
            "postal_code": "358014326",
            "telephone_number": "256-265-7952"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOLLADAY",
        "first_name": "MARGARET",
        "middle_name": "SULLIVAN",
        "credential": "M.C.D, CCC-SLP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2018-12-17",
        "last_updated": "2026-01-18",
        "certification_date": "2026-01-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "235Z00000X",
            "taxonomy_group": "",
            "desc": "Speech-Language Pathologist",
            "state": "AL",
            "license": "4156",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Dawn Holden
• Shaf B. Holden, MD
• Spencer Holden, CRNP
• Vanessa Monique Holder, LMSW
• Herbert K Holdsambeck, MD
• Rodney L Holladay, M.D.
• Sheila Renee Holland Pruett
• Amy Holland, M.S., CCC-SLP
• Anna Holland, RD, LD
• Carolyn Holland, MS, ATC

• Speech-Language Pathologist in Huntsville, AL
• Providers in Huntsville, AL by specialty
• Speech-Language Pathologist in Alabama

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 18, 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.