Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marshall S St. Amant, M.D.

Maternal & Fetal Medicine Physician in Baton Rouge, LA · enumerated 2005.

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

National Provider Identifier

1649279969

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Registry record

Entity type Individual (Type 1)

Name Marshall S St. Amant

Credential M.D.

Sex Male

Practice address 100 Womans Way, Baton Rouge, LA, 70817

Phone (225) 924-8338

Enumeration date Jul 19, 2005

Last updated in NPPES Feb 16, 2026

Taxonomy & licenses

207VM0101X Maternal & Fetal Medicine Physician Allopathic & Osteopathic Physicians · License 0101288138 (VA) Secondary

207VM0101X Maternal & Fetal Medicine Physician Allopathic & Osteopathic Physicians · License 017767 (LA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Marshall St. Amant practice?

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

What is the NPI number for Marshall St. Amant?

The National Provider Identifier (NPI) for Marshall St. Amant is 1649279969, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-16.