Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Greg A Zweiacher, DC

Chiropractor in Smyrna, DE · enumerated 2005.

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

National Provider Identifier

1801873385

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Greg A Zweiacher

Credential DC

Sex Male

Practice address 100 S Main St, Suite 204, Smyrna, DE, 19977

Phone (302) 653-1188

Fax (302) 653-1182

Enumeration date Dec 27, 2005

Last updated in NPPES May 29, 2013

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License F10000349 (DE) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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 NPI 1801873385 active?

Yes, as of the latest NPPES snapshot, NPI 1801873385 is active (record last updated 2013-05-29).

How do I verify Greg Zweiacher's NPI record?

Cross-check NPI 1801873385 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-29.