Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron Wienczak, OTR

Hand Occupational Therapist in Livonia, MI · enumerated 2019.

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

National Provider Identifier

1972166692

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Registry record

Entity type Individual (Type 1)

Name Aaron Wienczak

Credential OTR

Sex Male

Practice address 36622 Five Mile Rd Ste 215, Livonia, MI, 48154

Phone (734) 542-9770

Enumeration date Apr 18, 2019

Last updated in NPPES Jun 13, 2024

Taxonomy & licenses

225XH1200X Hand Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 5201010574 (MI) Primary

Other identifiers

Identifier	Type	State	Issuer
5201010574	Other	MI	STATE LICENSE

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

What specialty is Aaron Wienczak?

Aaron Wienczak is registered in NPPES with the primary taxonomy of Hand Occupational Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-13.