NPI Portal NPI Lookup & Verification

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

Mark Siegel

Physical Therapist in Thibodaux, LA · enumerated 2007 · practices at Advance Physcial Therapy and Rehabilitation.

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

National Provider Identifier

1588863799

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Registry record

Entity type Individual (Type 1)
Name Mark Siegel
Sex Male
Practice address Thibodaux, LA, 70301
Phone (985) 448-5888
Enumeration date Jul 17, 2007
Last updated in NPPES Apr 3, 2025

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

Taxonomy & licenses

261QP2000X Physical Therapy Clinic/Center Ambulatory Health Care Facilities · License PT03218 (LA) Secondary
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative 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.

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Frequently asked questions

Is NPI 1588863799 active?
Yes, as of the latest NPPES snapshot, NPI 1588863799 is active (record last updated 2025-04-03).
How do I verify Mark Siegel's NPI record?
Cross-check NPI 1588863799 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-03.