Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Louis Alonzo Madden, ATC

Athletic Trainer in Germantown, TN · enumerated 2022.

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

National Provider Identifier

1992437248

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Registry record

Entity type Individual (Type 1)

Name Mr. Louis Alonzo Madden

Credential ATC

Sex Male

Practice address 1400 S Germantown Rd, Germantown, TN, 38138

Phone (901) 759-3100

Enumeration date Jun 27, 2022

Last updated in NPPES Jun 27, 2022

Taxonomy & licenses

2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 1718 (TN) 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 specialty is Louis Madden?

Louis Madden is registered in NPPES with the primary taxonomy of Athletic Trainer. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-27.