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

Sarah Marie Mertz-Lisiecki, NP

Women's Health Nurse Practitioner in Oak Park, MI · enumerated 2023.

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

National Provider Identifier

1881376689

Verified

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Registry record

Entity type Individual (Type 1)

Name Sarah Marie Mertz-Lisiecki

Credential NP

Sex Female

Practice address Oak Park, MI, 48237

Phone (313) 680-6687

Enumeration date Aug 2, 2023

Last updated in NPPES Aug 2, 2023

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

Taxonomy & licenses

363LW0102X Women's Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4704357828 (MI) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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.

Read the full guide → Validate an NPI →

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 Sarah Mertz-Lisiecki?

Sarah Mertz-Lisiecki is registered in NPPES with the primary taxonomy of Women's Health Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-02.