Individual provider Active NPI

Darian Michalle Holstad, SLPA

  • Speech-Language Assistant
  • Glendale, AZ
National Provider Identifier
1619863271
Registry record updated Jun 17, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Speech-Language AssistantTaxonomy code 2355S0801X
License
SLPA16325 Issued in AZ
Practice address
20329 N 59TH Ave Ste A2
Glendale, AZ 85308-6854
Phone
(480) 787-5387
NPI assigned
Jun 17, 2025
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 17, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Speech-Language Assistant 2355S0801X SLPA16325 AZ Primary

Addresses

Primary practice location

20329 N 59TH Ave Ste A2
Glendale, AZ 85308-6854

Mailing address

11050 N Biltmore Dr Apt 375
Phoenix, AZ 85029-7319
Phone (480) 259-8704

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

State licenses

LicenseStateTypeSpecialty
SLPA16325AZMDSpeech-Language Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Therapy Tree Group PLLC CurrentSince Jun 23, 2025 Accepting new patients
Therapy Tree, PLLC PastSince Jun 23, 2025 Accepting new patients

Locations

20329 N 59th Ave
Ste A2
Glendale, AZ 85308
Phone (623) 500-2401

Organizations & group practices 2

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.

NPI Registry JSON

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

{
    "created_epoch": "1750118400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750118400000",
    "number": "1619863271",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "11050 N BILTMORE DR APT 375",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850297319",
            "telephone_number": "480-259-8704"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20329 N 59TH AVE STE A2",
            "city": "GLENDALE",
            "state": "AZ",
            "postal_code": "853086854",
            "telephone_number": "480-787-5387"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOLSTAD",
        "first_name": "DARIAN",
        "middle_name": "MICHALLE",
        "credential": "SLPA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-06-17",
        "last_updated": "2025-06-17",
        "certification_date": "2025-06-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2355S0801X",
            "taxonomy_group": "",
            "desc": "Specialist/Technologist, Speech-Language Assistant",
            "state": "AZ",
            "license": "SLPA16325",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Glendale, AZ

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 17, 2025; 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.