Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Gretchen Marie Sitek, PTA

Physical Therapy Assistant in Scottsdale, AZ · enumerated 2007 · practices at Ditare, Inc.

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

National Provider Identifier

1083752562

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Registry record

Entity type Individual (Type 1)

Name Mrs. Gretchen Marie Sitek

Credential PTA

Sex Female

Practice address Scottsdale, AZ, 85250

Phone (480) 951-6451

Enumeration date Feb 5, 2007

Last updated in NPPES Jun 24, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

225200000X Physical Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 5894A (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.

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Frequently asked questions

How do I verify Gretchen Sitek's NPI record?

Cross-check NPI 1083752562 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1083752562 active?

Yes, as of the latest NPPES snapshot, NPI 1083752562 is active (record last updated 2011-06-24).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-24.