Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diana L Tomlianovich, PMHNP-BC

Psychiatric/Mental Health Nurse Practitioner in Mount Vernon, IL · enumerated 2017.

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

National Provider Identifier

1497288492

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Registry record

Entity type Individual (Type 1)

Name Diana L Tomlianovich

Credential PMHNP-BC

Sex Female

Practice address 2920 Veterans Memorial Dr, Mount Vernon, IL, 62864

Phone (618) 244-6544

Fax (618) 244-6577

Enumeration date Apr 6, 2017

Last updated in NPPES Feb 5, 2026

Taxonomy & licenses

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209.014810 (IL) Primary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209.014810 (IL) Secondary

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 is the NPI number for Diana Tomlianovich?

The National Provider Identifier (NPI) for Diana Tomlianovich is 1497288492, a Type 1 (individual) record in the CMS NPPES registry.

Where does Diana Tomlianovich practice?

The practice location on file with NPPES is in Mount Vernon, IL. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-05.