Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Allison L Lewis

Registered Dietitian in Merrillville, IN · enumerated 2021.

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

National Provider Identifier

1790448660

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Allison L Lewis

Sex Female

Practice address 8555 Taft St, Merrillville, IN, 46410

Phone (219) 769-4005

Enumeration date Oct 18, 2021

Last updated in NPPES Oct 18, 2021

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Allison Lewis?

The National Provider Identifier (NPI) for Allison Lewis is 1790448660, a Type 1 (individual) record in the CMS NPPES registry.

Where does Allison Lewis practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-18.