MARSHALL S ST. AMANT M.D.
NPI 1649279969
Obstetrics & Gynecology - Maternal & Fetal Medicine in Baton Rouge, LA

Q: What is Marshall St. Amant's NPI number?

The NPI number for Marshall St. Amant is 1649279969. It was assigned to this individual provider in the NPPES registry on July 19, 2005.

Q: What is Marshall St. Amant's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Active since July 19, 2005PECOS EnrolledAccepts Medicare Assignment

100 WOMANS WAY, BATON ROUGE, LA 70817(225) 924-8338 Get Directions Write a Review

NPPES record last updated: February 16, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 14, 2023, Aug 12, 2022, Jun 18, 2021 and 1 more (4 updates tracked since 2019).

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About Marshall S St. Amant M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARSHALL S ST. AMANT M.D. (NPI 1649279969) is an individual maternal & fetal medicine provider in Baton Rouge, Louisiana, licensed in Louisiana (017767) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, maintains 4 additional practice locations, and is a graduate of Louisiana State University School Of Medicine In New Orleans (1984).

NPPES Registry Identity

NPI1649279969

Entity TypeIndividualMale

Primary Taxonomy207VM0101X

Provider Legal NameMARSHALL S ST. AMANTCredential: M.D.

Location Address100 WOMANS WAYBaton Rouge, LA 70817-5100

Mailing Address100 Womans WayBaton Rouge, LA 70817-5100 · (225) 924-8338 · Fax (225) 922-3745

Phone(225) 924-8338

Sole ProprietorNo

Medical School CMSLouisiana State University School Of Medicine In New OrleansGraduated 1984

Enumeration DateJuly 19, 2005

Last NPPES UpdateFebruary 16, 20264 updates tracked since enumeration

NPPES CertifiedFebruary 16, 2026

✔ NPI 1649279969 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207VM0101X

Licenses✔ Licensed in LA · 017767✔ Licensed in VA · 0101288138

Definition

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

100 WOMANS WAY, Baton Rouge, LA 70817

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Secondary Practice Locations 4

Location 19000 Airline Hwy, Ste 370Baton Rouge, LA 70815-4114 · Phone (225) 924-8338 · Fax (225) 922-3745

Location 24600 Ambassador Caffery PkwyLafayette, LA 70508-6902 · Phone (337) 521-9100 · Fax (337) 470-2019

Location 34630 Ambassador Caffery Pkwy Ste 204Lafayette, LA 70508-6949 · Phone (337) 470-4653 · Fax (337) 470-8319

Location 4309 Jackson StMonroe, LA 71201-7407 · Phone (318) 966-4000 · Fax (318) 966-7359

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Blue Cross and Blue Shield of Louisiana, CHRISTUS Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marshall S St. Amant M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7315975257

PECOS Enrollment IDI20050801000989, I20260225000675

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 70817 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$124.60 typical visit price

range $53.43 – $164.73

Typical copayment $31.15 (range $13.35 – $41.18)

Most-billed visit code 99204

Established Patient

$67.06 typical visit price

range $16.64 – $133.62

Typical copayment $16.76 (range $4.16 – $33.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WOMANS HOSPITAL FOUNDATION

Pharmacy

100 WOMANS WAY, SUITE SSB1
BATON ROUGE, LA 70817

East Baton Rouge Parish (225) 924-8199

LINDSAY JONES

Nurse Anesthetist, Certified Registered