Marshall St. Amant, M.D.
NPI 1649279969 · Maternal & Fetal Medicine Physician · Baton Rouge, LA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marshall St. Amant, M.D. is a Maternal & Fetal Medicine Physician provider in Baton Rouge, LA (NPI 1649279969).
Provider details
- NPI number
- 1649279969
- Entity type
- Individual
- Primary specialty
- Maternal & Fetal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101288138 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
5 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (4)
- 9000 Airline HwySte 370Baton Rouge, LA 70815-4114Phone: (225) 924-8338Fax: (225) 922-3745
- 4630 Ambassador Caffery Pkwy Ste 204Lafayette, LA 70508-6949Phone: (337) 470-4653Fax: (337) 470-8319
- 4600 Ambassador Caffery PkwyLafayette, LA 70508-6902Phone: (337) 521-9100Fax: (337) 470-2019
- 309 Jackson StMonroe, LA 71201-7407Phone: (318) 966-4000Fax: (318) 966-7359
Registry dates
- Enumerated
- 2005-07-19
- Last updated
- 2026-02-16
- Certified
- 2026-02-16
Frequently asked questions
- What is Marshall St. Amant's NPI number?
- Marshall St. Amant's National Provider Identifier (NPI) is 1649279969, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marshall St. Amant's specialty?
- Marshall St. Amant is listed in the NPPES registry with a primary specialty of Maternal & Fetal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marshall St. Amant located?
- Marshall St. Amant's practice location on file with NPPES is 100 Womans Way, Baton Rouge, LA 70817-5100.
- What is Marshall St. Amant's phone number?
- The practice phone number listed in the NPPES registry for Marshall St. Amant is (225) 924-8338.
- Does Marshall St. Amant accept Medicare?
- Marshall St. Amant is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marshall St. Amant's NPI active?
- Yes — Marshall St. Amant's NPI (1649279969) is active in the NPPES registry as of the last update on 2026-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.