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

Karl Phillip Sloss, RDN, LD

Registered Dietitian in Hilo, HI · enumerated 2018.

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

National Provider Identifier

1225517600

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Registry record

Entity type Individual (Type 1)
Name Karl Phillip Sloss
Credential RDN, LD
Sex Male
Practice address Hilo, HI, 96720
Phone (808) 932-3953
Fax (808) 933-9916
Enumeration date Aug 7, 2018
Last updated in NPPES Aug 7, 2018

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

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License DT84106 (TX) Primary

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

What is the NPI number for Karl Sloss?
The National Provider Identifier (NPI) for Karl Sloss is 1225517600, a Type 1 (individual) record in the CMS NPPES registry.
Where does Karl Sloss practice?
The practice location on file with NPPES is in Hilo, HI. Providers can have multiple locations; NPPES lists the primary practice address.

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