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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

TATIANA ZASSICK PMHNP
NPI 1316878192
Nurse Practitioner - Psychiatric/Mental Health in Wilmington, DE

Active since May 28, 2026
501 W 14TH ST STE 1E40, WILMINGTON, DE 19801(302) 320-2100(302) 320-2121 Get Directions Write a Review

NPPES record last updated: October 26, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 26, 2026, Aug 23, 2026, May 28, 2026 (3 updates tracked since 2026).

About Tatiana Zassick Pmhnp NPPES

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

TATIANA ZASSICK PMHNP (NPI 1316878192) is an individual psychiatric/mental health provider in Wilmington, Delaware, licensed in Delaware (L8-0011220) and active in the NPI registry since May 2026.

NPPES Registry Identity

NPI1316878192
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameTATIANA ZASSICKCredential: PMHNP
Location Address501 W 14TH ST STE 1E40Wilmington, DE 19801-1013
Mailing Address501 W 14th St Ste 1e40Wilmington, DE 19801-1013 · (302) 320-2100 · Fax (302) 320-2121
Phone(302) 320-2100
Fax(302) 320-2121
Sole ProprietorNo
Enumeration DateMay 28, 2026
Last NPPES UpdateOctober 26, 20263 updates tracked since enumeration
NPPES CertifiedOctober 26, 2026
✔ NPI 1316878192 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in DE · L8-0011220
Also ListedRegistered NurseTaxonomy 163W00000X · License RN709534 (PA)
Also ListedNurse PractitionerTaxonomy 363L00000X · License L8-0011220 (DE)
501 W 14TH ST STE 1E40, Wilmington, DE 19801
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Other Providers at the Same Location NPPES 20

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

BETSY-ANN HENRY LCSW
Social Worker (Clinical)
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100
CHRISTIANA CARE HEALTH SERVICES INC
Internal Medicine (Addiction Medicine)
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100
ZACHARY MICHAEL DIANGELO MD
Psychiatry & Neurology (Psychiatry)
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100
KIERRA O. OJULO
Nurse Practitioner
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100
CHRISTIANA CARE HEALTH SERVICES INC
Psychologist (Clinical)
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100
RACHEL BAHAR LCSW
Social Worker (Clinical)
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100
DR. ROBERT FRANCIS BAHNSEN JR. M.D.
Psychiatry & Neurology (Psychiatry)
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100
DR. CONNOR LESLIE RATCHFORD MD
Psychiatry & Neurology (Psychiatry)
501 W 14TH ST STE 1E40
WILMINGTON, DE 19801
New Castle County (302) 320-2100

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 Tatiana Zassick's NPI number?

The NPI number for Tatiana Zassick is 1316878192. It was assigned to this individual provider in the NPPES registry on May 28, 2026.

Where is Tatiana Zassick located?

Tatiana Zassick practices at 501 W 14th St Ste 1e40, Wilmington, DE 19801. The listed phone number is (302) 320-2100.

What is Tatiana Zassick's specialty?

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

When was this NPI record last updated?

The NPPES record for Tatiana Zassick was last updated on October 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 days 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.