NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Dickson Witmer Associates

Surgery Physician in Wilmington, DE · enumerated 2007 · authorized official Diana Dickson Witmer, President.

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

National Provider Identifier

1134271141

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Dickson Witmer Associates
Practice address 1504 N Broom St, Suite 2, Wilmington, DE, 19806
Phone (302) 656-1882
Enumeration date Jan 18, 2007
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License C1-002159 (DE) Primary

Authorized official

Name Diana Dickson Witmer
Title President
Phone (302) 656-1882

Other identifiers

Identifier Type State Issuer
0000256602 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

Who is the authorized official for Dickson Witmer Associates?
NPPES lists Diana Dickson Witmer (President) as the authorized official for this organization.
What is the NPI number for Dickson Witmer Associates?
The NPI for Dickson Witmer Associates is 1134271141, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.