Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Katherine E Ruff, DNP, ARNP, FNP-BC

Family Nurse Practitioner in Maquoketa, IA · enumerated 2019.

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

National Provider Identifier

1225699820

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Registry record

Entity type Individual (Type 1)

Name Katherine E Ruff

Credential DNP, ARNP, FNP-BC

Sex Female

Practice address Maquoketa, IA, 52060

Phone (563) 652-5145

Enumeration date Jun 25, 2019

Last updated in NPPES May 7, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A155110 (IA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License A155110 (IA) Primary

DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses. About the DNP credential

Other identifiers

Identifier	Type	State	Issuer
A155110	Other	IA	IOWA BOARD OF NURSING LICENSE

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.

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Frequently asked questions

How do I verify Katherine Ruff's NPI record?

Cross-check NPI 1225699820 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1225699820 active?

Yes, as of the latest NPPES snapshot, NPI 1225699820 is active (record last updated 2021-05-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-07.