Marcia Gremillion, M.D.
NPI 1396825816 · Diagnostic Radiology Physician · Baton Rouge, LA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcia Gremillion, M.D. is a Diagnostic Radiology Physician provider in Baton Rouge, LA (NPI 1396825816).
Provider details
- NPI number
- 1396825816
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 020472 (LA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
83 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Screening 3d Breast Mammography77063 | 26 | $26 |
| Screening Mammography77067 | 26 | $33 |
| Diagnostic Mammography of 1 Breast77065 | 17 | $36 |
| Mri Scan of Both Breasts77049 | 14 | $101 |
Typical Medicare-allowed amounts for these services range $26–$101 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-17
- Last updated
- 2014-11-03
Frequently asked questions
- What is Marcia Gremillion's NPI number?
- Marcia Gremillion's National Provider Identifier (NPI) is 1396825816, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcia Gremillion's specialty?
- Marcia Gremillion is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Marcia Gremillion located?
- Marcia Gremillion's practice location on file with NPPES is 100 Womans Way, Baton Rouge, LA 70817-5100.
- What is Marcia Gremillion's phone number?
- The practice phone number listed in the NPPES registry for Marcia Gremillion is (225) 924-8264.
- Does Marcia Gremillion accept Medicare?
- Marcia Gremillion is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcia Gremillion's NPI active?
- Yes — Marcia Gremillion's NPI (1396825816) is active in the NPPES registry as of the last update on 2014-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.