Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Abby Irene Kolthoff, ARNP

Psychiatric/Mental Health Nurse Practitioner in Waterloo, IA · enumerated 2013 · practices at Black Hawk-Grundy Mental Health Center Inc..

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

National Provider Identifier

1184056822

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Registry record

Entity type Individual (Type 1)

Name Mrs. Abby Irene Kolthoff

Credential ARNP

Sex Female

Practice address 3251 W 9th St, Waterloo, IA, 50702

Phone (319) 234-2893

Fax (319) 234-0354

Enumeration date Aug 5, 2013

Last updated in NPPES Nov 2, 2022

Taxonomy & licenses

164W00000X Licensed Practical Nurse Nursing Service Providers · License P49107 (IA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License G171685 (IA) Primary

Other identifiers

Identifier	Type	State	Issuer
0074435	Medicaid	IA	-

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

What is the NPI number for Abby Kolthoff?

The National Provider Identifier (NPI) for Abby Kolthoff is 1184056822, a Type 1 (individual) record in the CMS NPPES registry.

Where does Abby Kolthoff practice?

The practice location on file with NPPES is in Waterloo, IA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-02.