Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rebecca Marie Aleck, D.O.

Hospitalist Physician in Siloam Springs, AR · enumerated 2012.

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

National Provider Identifier

1598030603

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Registry record

Entity type Individual (Type 1)

Name Rebecca Marie Aleck

Credential D.O.

Sex Female

Practice address 603 N Progress Ave, Siloam Springs, AR, 72761

Phone (479) 524-4141

Enumeration date Mar 22, 2012

Last updated in NPPES Aug 27, 2018

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License E-9279 (AR) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 2014023583 (MO) Secondary

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 Rebecca Aleck practice?

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

What is the NPI number for Rebecca Aleck?

The National Provider Identifier (NPI) for Rebecca Aleck is 1598030603, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-27.