Marshall S St. Amant, M.D.

Primary specialty

Maternal & Fetal Medicine PhysicianTaxonomy code 207VM0101X

License

017767 Issued in LA

Practice address

100 Womans Way
Baton Rouge, LA 70817-5100

Phone

(225) 924-8338

NPI assigned

Jul 19, 2005

Last updated

Feb 16, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Electronic endpoints 4

Medicare fee-for-service enrollment

Enrolled in LA, VA2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Obstetrics/Gynecology

Education

Louisiana State University School of Medicine in New Orleans, 1984

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Lsuhn Billing LLCGroup PAC ID 0446337802, 203 clinicians

Ochsner Clinic LLCGroup PAC ID 8224933619, 2,845 clinicians

Bon Secours St Marys Hospital of Richmond LLCGroup PAC ID 8527969476, 66 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations (25 of 27)

Interoperability endpoints

• Direct secure messaging: mstamant16318@direct.casso.us.com
• Direct secure messaging: mstamant21943@womanshospital.direct-ci.com
• Direct secure messaging: mstamant312114@direct.ochsner.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Lsuhn Billing LLC

  • Multi-Specialty Clinic/Center
  • Lafayette, LA
  • NPI 1992975775
  Medicare reassignment Care Compare group NPD
• Ochsner Clinic LLC

  • General Practice Physician
  • New Orleans, LA
  • NPI 1538151428
  Medicare reassignment Care Compare group NPD
• Bon Secours St. Mary's Hospital of Richmond LLC

  dba Bon Secours St Mary's Hospital

  • General Acute Care Hospital
  • Richmond, VA
  • NPI 1962464016
  Medicare reassignment Care Compare group
• LCMS Maternal Fetal Medicine, LLC

  dba Maternal Fetal Medicine

  • Maternal & Fetal Medicine Physician
  • Lake Charles, LA
  • NPI 1801198528
  Medicare reassignment NPD
• Louisiana State University School of Medicine in New Orleans Faculty G

  dba LSU Healthcare Network

  • Multi-Specialty Clinic/Center
  • New Orleans, LA
  • NPI 1477582526
  Medicare reassignment NPD
• Lourdes Physician Group LLC

  • Family Medicine Physician
  • Lafayette, LA
  • NPI 1437405883
  Medicare reassignment NPD
• North Oaks Medical Center, LLC

  dba North Oaks Hospital Medicine

  • Hospitalist Physician
  • Hammond, LA
  • NPI 1962709501
  Medicare reassignment NPD
• North Oaks Physician Group, LLC

  dba North Oaks Physician Group

  • Multi-Specialty Clinic/Center
  • Hammond, LA
  • NPI 1427035211
  Medicare reassignment NPD
• St Francis Medical Center, Inc

  • Diagnostic Radiology Physician
  • Monroe, LA
  • NPI 1437149168

  Neonatal-Perinatal Medicine

  Medicare reassignment NPD
• St. Tammany Parish Hospital Service District No 1

  dba St. Tammany Parish Hospital

  • General Acute Care Hospital
  • Covington, LA
  • NPI 1598798597
  Medicare reassignment NPD
• Thibodaux Regional Network Development Corporation

  • Anesthesiology Physician
  • Thibodaux, LA
  • NPI 1285658310

  Maternal & Fetal Medicine

  Medicare reassignment NPD
• Woman's Maternal Fetal Medicine

  dba Maternal Fetal Medicine Center at Woman's Hospital

  • Maternal & Fetal Medicine Physician
  • Baton Rouge, LA
  • NPI 1396780193
  Medicare reassignment NPD

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1121731200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771200000000",
    "number": "1649279969",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 WOMANS WAY",
            "city": "BATON ROUGE",
            "state": "LA",
            "postal_code": "708175100",
            "telephone_number": "225-924-8338",
            "fax_number": "225-922-3745"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 WOMANS WAY",
            "city": "BATON ROUGE",
            "state": "LA",
            "postal_code": "708175100",
            "telephone_number": "225-924-8338"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "309 Jackson St",
            "address_purpose": "LOCATION",
            "city": "Monroe",
            "state": "LA",
            "postal_code": "712017407",
            "country_code": "US",
            "telephone_number": "318-966-4000",
            "fax_number": "318-966-7359",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4630 Ambassador Caffery Pkwy Ste 204",
            "address_purpose": "LOCATION",
            "city": "Lafayette",
            "state": "LA",
            "postal_code": "705086949",
            "country_code": "US",
            "telephone_number": "337-470-4653",
            "fax_number": "337-470-8319",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "9000 Airline Hwy",
            "address_2": "Ste 370",
            "address_purpose": "LOCATION",
            "city": "Baton Rouge",
            "state": "LA",
            "postal_code": "708154114",
            "country_code": "US",
            "telephone_number": "225-924-8338",
            "fax_number": "225-922-3745",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4600 Ambassador Caffery Pkwy",
            "address_purpose": "LOCATION",
            "city": "Lafayette",
            "state": "LA",
            "postal_code": "705086902",
            "country_code": "US",
            "telephone_number": "337-521-9100",
            "fax_number": "337-470-2019",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ST. AMANT",
        "first_name": "MARSHALL",
        "middle_name": "S",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-19",
        "last_updated": "2026-02-16",
        "certification_date": "2026-02-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207VM0101X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology, Maternal & Fetal Medicine",
            "state": "VA",
            "license": "0101288138",
            "primary": false
        },
        {
            "code": "207VM0101X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology, Maternal & Fetal Medicine",
            "state": "LA",
            "license": "017767",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mstamant16318@direct.casso.us.com",
            "affiliation": "N",
            "endpointDescription": "FMOLHS-Epic",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "mstamant16318@direct.casso.us.com",
            "address_1": "4630 Ambassador Caffery Pkwy Ste 204",
            "city": "Lafayette",
            "state": "LA",
            "country_code": "US",
            "postal_code": "705086949",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0830.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "N",
            "endpointDescription": "FMOLHS FHIR URL",
            "use": "OTHER",
            "useDescription": "Other",
            "useOtherDescription": "FHIR API",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "309 Jackson St",
            "city": "Monroe",
            "state": "LA",
            "country_code": "US",
            "postal_code": "712017407",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mstamant16318@direct.casso.us.com",
            "affiliation": "N",
            "endpointDescription": "FMOLHS-Epic",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "mstamant16318@direct.casso.us.com",
            "address_1": "309 Jackson St",
            "city": "Monroe",
            "state": "LA",
            "country_code": "US",
            "postal_code": "712017407",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0830.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "N",
            "endpointDescription": "FMOLHS FHIR URL",
            "use": "OTHER",
            "useDescription": "Other",
            "useOtherDescription": "FHIR API",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "4630 Ambassador Caffery Pkwy Ste 204",
            "city": "Lafayette",
            "state": "LA",
            "country_code": "US",
            "postal_code": "705086949",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Ashley St Martin
• Elise St Pe, PT
• Eddie St-Vil
• Brandon Scott St. Amant, M.D.
• Lacey St. Amant, NP
• St. Christopher's Halfway House of la, Inc.
• St. Gabriel Health Clinic, Inc. (Celerity Dalton - St. Gabriel Health Clinic, Inc.)
• St. George Fire Protection District #2
• St. Helena Hospice, LLC (Hospice Specialists of Louisiana)
• St. James Place of Baton Rouge

• Maternal & Fetal Medicine Physician in Baton Rouge, LA
• Providers in Baton Rouge, LA by specialty
• Maternal & Fetal Medicine Physician in Louisiana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 16, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.