Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret Leister, CADC, LCDP

Addiction (Substance Use Disorder) Counselor in Dover, DE · enumerated 2007 · practices at Joseph B. Hicks.

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

National Provider Identifier

1508991183

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Margaret Leister

Credential CADC, LCDP

Sex Female

Practice address 1550 S Governors Ave, Dover, DE, 19904

Phone (302) 678-4558

Fax (302) 678-4577

Enumeration date Feb 22, 2007

Last updated in NPPES Aug 6, 2007

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 794 (DE) Secondary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License CD0000026 (DE) Primary

Other identifiers

Identifier	Type	State	Issuer
1000022542	Medicaid	DE	-
1000030483	Medicaid	DE	-

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

Where does Margaret Leister practice?

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

What is the NPI number for Margaret Leister?

The National Provider Identifier (NPI) for Margaret Leister is 1508991183, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Joseph B. Hicks Mental Health Counselor · Dover, DE NPI 1568502888 Francesca Stasko Clinical Social Worker · Dover, DE NPI 1427270818 Peter Iotov Marriage & Family Therapist · Dover, DE NPI 1245462498 Morris Phinnessee Mental Health Counselor · Dover, DE NPI 1417281213

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-06.