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MS. DIANE MICHELE POSTELL LCSW, CADC
NPI 1205912839
Marriage & Family Therapist in Wilmington, DE

Active since October 27, 2006
3618 SILVERSIDE RD, WILMINGTON, DE 19810(302) 547-5505 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Ms. Diane Michele Postell Lcsw, Cadc NPPES

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

MS. DIANE MICHELE POSTELL LCSW, CADC (NPI 1205912839) is an individual marriage & family therapist in Wilmington, Delaware and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1205912839
Entity TypeIndividualFemale
Primary Taxonomy106H00000X
Provider Legal NameMS. DIANE MICHELE POSTELLCredential: LCSW, CADC
Location Address3618 SILVERSIDE RDWilmington, DE 19810-5190
Mailing Address2314 Cherry LnWilmington, DE 19810-4002 · (302) 547-5505
Phone(302) 547-5505
Sole ProprietorYes
Enumeration DateOctober 27, 2006
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1205912839 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers
Taxonomy Code106H00000X
Definition
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.
Also ListedSocial Worker · ClinicalTaxonomy 1041C0700X · License Q10000521 (DE)
3618 SILVERSIDE RD, Wilmington, DE 19810
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Other Providers at the Same Location NPPES 4

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

ANA CAROLINA SANTIAGO BOUSSON
Counselor (Mental Health)
3618 SILVERSIDE RD
WILMINGTON, DE 19810
New Castle County (302) 725-3120
ONYX STRATEGIES
Marriage & Family Therapist
3618 SILVERSIDE RD
WILMINGTON, DE 19810
New Castle County (302) 867-6070
ROSA MARY DUBOSE
Counselor
3618 SILVERSIDE RD
WILMINGTON, DE 19810
New Castle County (302) 725-3120
MATTHEW A IYANDA MS. PHD
Counselor (Addiction (Substance Use Disorder))
3618 SILVERSIDE RD
WILMINGTON, DE 19810
New Castle County (302) 725-3120

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 Postell's NPI number?

The NPI number for Diane Postell is 1205912839. It was assigned to this individual provider in the NPPES registry on October 27, 2006.

Where is Diane Postell located?

Diane Postell practices at 3618 Silverside Rd, Wilmington, DE 19810. The listed phone number is (302) 547-5505.

What is Diane Postell's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

When was this NPI record last updated?

The NPPES record for Diane Postell was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.