Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marcia Ann Wirth, DIETICIAN

Registered Dietitian in Geneseo, IL · enumerated 2006.

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

National Provider Identifier

1386703643

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Marcia Ann Wirth

Credential DIETICIAN

Sex Female

Practice address 600 N College Ave, Geneseo, IL, 61254

Phone (309) 944-6431

Enumeration date Dec 6, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 716443 (IL) Primary

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 1386703643 active?

Yes, as of the latest NPPES snapshot, NPI 1386703643 is active (record last updated 2007-07-08).

How do I verify Marcia Wirth's NPI record?

Cross-check NPI 1386703643 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 2007-07-08.