Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ann Marie Geimer, N.P.

Nurse Practitioner in Decatur, IN · enumerated 2009.

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

National Provider Identifier

1558596478

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Registry record

Entity type Individual (Type 1)

Name Ann Marie Geimer

Credential N.P.

Sex Female

Practice address 1100 Mercer Ave, Decatur, IN, 46733

Phone (260) 724-2145

Fax (260) 728-3867

Enumeration date May 20, 2009

Last updated in NPPES Oct 15, 2025

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 71002922A (IN) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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

How do I verify Ann Geimer's NPI record?

Cross-check NPI 1558596478 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1558596478 active?

Yes, as of the latest NPPES snapshot, NPI 1558596478 is active (record last updated 2025-10-15).

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Debra Brandenberger Adult Health Nurse Practitioner · Decatur, IN NPI 1063412419 Haven Dove Certified Registered Nurse Anesthetist · Decatur, IN NPI 1710989710 Michael Ainsworth Family Medicine Physician · Decatur, IN NPI 1629058698 Alicia Bates Nurse Practitioner · Decatur, IN NPI 1053391037 David Colclasure Anesthesiology Physician · Decatur, IN NPI 1699740191 Mark Gresla Family Medicine Physician · Decatur, IN NPI 1467482034 Adams County Memorial Hospital Critical Access Hospital · Decatur, IN NPI 1689696148 Thomandram Sekar Hospitalist Physician · Decatur, IN NPI 1295838464

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-15.