Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Leigh Larsen, APRN

Nurse Practitioner in Marion, KS · enumerated 2016.

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

National Provider Identifier

1821445677

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Registry record

Entity type Individual (Type 1)

Name Karen Leigh Larsen

Credential APRN

Sex Female

Practice address 535 S Freeborn St, Marion, KS, 66861

Phone (316) 258-4969

Enumeration date May 23, 2016

Last updated in NPPES May 23, 2016

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 53-77240 (KS) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN 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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Karen Larsen?

Karen Larsen is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Hospital District No 1 Marion Co Home Health Agency · Marion, KS NPI 1003862616 Hospital District No 1 Marion Co Nursing Facility/Intermediate Care Facility · Marion, KS NPI 1144269630 Hospital District No 1 Marion Co Critical Access Hospital · Marion, KS NPI 1326087966 Hospital District No 1 Marion Co Medicare Defined Swing Bed Hospital Unit · Marion, KS NPI 1619991072 Hospital District No 1 Marion Co Critical Access Hospital · Marion, KS NPI 1144355793 Jaynette Miller Acute Care Nurse Practitioner · Marion, KS NPI 1982736757 Hospital District No 1 Marion Co Nursing Facility/Intermediate Care Facility · Marion, KS NPI 1740311620 Sheryl Simmonds Physical Therapist · Marion, KS NPI 1255450862

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-23.