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MS. DIANE GUARDIANI PMHNP (APRN)
NPI 1316957285
Nurse Practitioner - Psychiatric/Mental Health in Niantic, CT

Active since August 09, 2006
170 FLANDERS RD STE B1, NIANTIC, CT 06357(860) 385-6547(860) 807-1613 Get Directions Write a Review

NPPES record last updated: August 18, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 18, 2026, Dec 7, 2021 (2 updates tracked since 2021).

About Ms. Diane Guardiani Pmhnp (aprn) NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. DIANE GUARDIANI PMHNP (APRN) (NPI 1316957285) is an individual psychiatric/mental health provider in Niantic, Connecticut, licensed in Connecticut (2409) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1316957285
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameMS. DIANE GUARDIANICredential: PMHNP (APRN)
Location Address170 FLANDERS RD STE B1Niantic, CT 06357-1211
Mailing Address170 Flanders Rd Ste B1Niantic, CT 06357-1211 · (860) 385-6547 · Fax (860) 807-1613
Phone(860) 385-6547
Fax(860) 807-1613
Sole ProprietorNo
Enumeration DateAugust 9, 2006
Last NPPES UpdateAugust 18, 20262 updates tracked since enumeration
NPPES CertifiedAugust 18, 2026
✔ NPI 1316957285 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in CT · 2409
Also ListedNurse Practitioner · Acute CareTaxonomy 363LA2100X · License 002409 (CT)
170 FLANDERS RD STE B1, Niantic, CT 06357
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Other Identifiers 2

Medicaid1316957285CT
Medicaid1316957285RI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

NORTHLINE PSYCHIATRY PLLC
Clinic/Center (Mental Health (Including Community Mental Health Center))
170 FLANDERS RD STE B1
NIANTIC, CT 06357
Southeastern Connecticut Planning Region (860) 385-6547

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Diane Guardiani's NPI number?

The NPI number for Diane Guardiani is 1316957285. It was assigned to this individual provider in the NPPES registry on August 9, 2006.

Where is Diane Guardiani located?

Diane Guardiani practices at 170 Flanders Rd Ste B1, Niantic, CT 06357. The listed phone number is (860) 385-6547.

What is Diane Guardiani's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

What insurance does Diane Guardiani accept?

Health plans from Anthem Blue Cross and Blue Shield list Diane Guardiani as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Diane Guardiani was last updated on August 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.