Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John David Diekmann, DDS

Dentist in Evansville, IN · enumerated 2006 · practices at Andrew D. Shephard, DDS, LLC.

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

National Provider Identifier

1164594545

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. John David Diekmann

Credential DDS

Sex Male

Practice address 625 W Mill Rd, Evansville, IN, 47710

Phone (812) 464-9061

Fax (812) 464-8737

Enumeration date Nov 14, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

122300000X Dentist Dental Providers · License 12007227A (IN) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is John Diekmann?

John Diekmann is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Andrew D. Shephard, DDS, LLC Dental Clinic/Center · Evansville, IN NPI 1548574940

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