Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Natalie A Hassler, M.S.W.

Clinical Social Worker in Mesa, AZ · enumerated 2009 · practices at Surestep.

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

National Provider Identifier

1699918607

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Registry record

Entity type Individual (Type 1)

Name Ms. Natalie A Hassler

Credential M.S.W.

Sex Female

Practice address 1220 S Alma School Rd, Suite 109, Mesa, AZ, 85210

Phone (480) 834-2700

Enumeration date Apr 7, 2009

Last updated in NPPES Apr 7, 2009

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW-2275 (AZ) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1699918607 active?

Yes, as of the latest NPPES snapshot, NPI 1699918607 is active (record last updated 2009-04-07).

How do I verify Natalie Hassler's NPI record?

Cross-check NPI 1699918607 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Kristie Barber Marriage & Family Therapist · Mesa, AZ NPI 1780755066 Bonni Stephenson Mental Health Counselor · Mesa, AZ NPI 1104966910 Susan Lohrman Professional Counselor · Mesa, AZ NPI 1023251048 Surestep Counselor · Mesa, AZ NPI 1518241660

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-07.