Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Lois Nelson, D.O.

Pediatric Hematology & Oncology Physician in Sioux Falls, SD · enumerated 2015.

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

National Provider Identifier

1326420795

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Catherine Lois Nelson

Credential D.O.

Sex Female

Practice address 1600 W 22nd St Ste 6004, Sioux Falls, SD, 57105

Phone (605) 312-1000

Enumeration date Jun 22, 2015

Last updated in NPPES Nov 26, 2021

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License PGY.202905 (LA) Secondary

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 12682 (SD) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

Where does Catherine Nelson practice?

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

What is the NPI number for Catherine Nelson?

The National Provider Identifier (NPI) for Catherine Nelson is 1326420795, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-26.