Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jillian Margaret Grzeskiewicz, APRN

Psychiatric/Mental Health Nurse Practitioner in Gunnison, CO · enumerated 2022.

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

National Provider Identifier

1265170112

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Registry record

Entity type Individual (Type 1)

Name Jillian Margaret Grzeskiewicz

Credential APRN

Sex Female

Practice address 710 N Taylor St, Gunnison, CO, 81230

Phone (970) 252-3200

Fax (970) 259-2438

Enumeration date May 21, 2022

Last updated in NPPES Feb 9, 2026

Taxonomy & licenses

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License C-APN.0100340-C-NP (CO) Primary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 26095 (SC) Secondary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN 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

How do I verify Jillian Grzeskiewicz's NPI record?

Cross-check NPI 1265170112 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1265170112 active?

Yes, as of the latest NPPES snapshot, NPI 1265170112 is active (record last updated 2026-02-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-09.