Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Louis Walthall, LCSWR, CASAC

Clinical Social Worker in Ronkonkoma, NY · enumerated 2009.

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

National Provider Identifier

1558502880

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Louis Walthall

Credential LCSWR, CASAC

Sex Male

Practice address 3281 Veterans Memorial Hwy Ste E14, Ronkonkoma, NY, 11779

Phone (631) 471-3122

Enumeration date Mar 17, 2009

Last updated in NPPES Feb 22, 2018

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 73 051661 (NY) Secondary

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 73 051661 (NY) Secondary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 9438 (NY) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 051661 (NY) 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

How do I verify Louis Walthall's NPI record?

Cross-check NPI 1558502880 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1558502880 active?

Yes, as of the latest NPPES snapshot, NPI 1558502880 is active (record last updated 2018-02-22).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-02-22.