Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron Zietlow

Nurse Practitioner in Wauwatosa, WI · enumerated 2021.

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

National Provider Identifier

1770243289

Verified

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Registry record

Entity type Individual (Type 1)

Name Aaron Zietlow

Sex Male

Practice address 3077 N Mayfair Rd Ste 100, Wauwatosa, WI, 53222

Phone (414) 384-6700

Enumeration date Dec 23, 2021

Last updated in NPPES Jul 12, 2023

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 11651-33 (WI) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 11651-33 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
11651	Other	WI	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

Is NPI 1770243289 active?

Yes, as of the latest NPPES snapshot, NPI 1770243289 is active (record last updated 2023-07-12).

How do I verify Aaron Zietlow's NPI record?

Cross-check NPI 1770243289 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-07-12.