Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Hollie Trettenero, FNP-C

Nurse Practitioner in Gillespie, IL · enumerated 2015.

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

National Provider Identifier

1811389935

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Registry record

Entity type Individual (Type 1)

Name Ms. Hollie Trettenero

Credential FNP-C

Sex Female

Practice address 715 Broadway St, Gillespie, IL, 62033

Phone (217) 839-4491

Enumeration date Feb 26, 2015

Last updated in NPPES Feb 26, 2015

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209012517 (IL) Primary

Other identifiers

Identifier	Type	State	Issuer
209012517	Other	IL	ST OF IL

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

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 Hollie Trettenero?

Hollie Trettenero is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-26.