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Heidi L Sonntag, MSW, LCSW

Clinical Social Worker in Scottsdale, AZ · enumerated 2007 · practices at Abc Concepts LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1790833887

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Registry record

Entity type Individual (Type 1)
Name Heidi L Sonntag
Credential MSW, LCSW
Sex Female
Practice address 9929 N 95th St, Suite 101, Scottsdale, AZ, 85258
Phone (480) 236-1432
Fax (480) 661-1069
Enumeration date Jan 8, 2007
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW-2433 (AZ) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Heidi Sonntag?
Heidi Sonntag is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.