NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Melissa Leffingwell

Specialist in Auburn, CA · enumerated 2007 · practices at James N. Hardwick.

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

National Provider Identifier

1003938291

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mrs. Melissa Leffingwell
Sex Female
Practice address 1254 High St, Auburn, CA, 95603
Phone (530) 889-9195
Fax (530) 889-9197
Enumeration date Apr 6, 2007
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other 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

Where does Melissa Leffingwell practice?
The practice location on file with NPPES is in Auburn, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Melissa Leffingwell?
The National Provider Identifier (NPI) for Melissa Leffingwell is 1003938291, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.