Quick answers
- Does Marilu O Byrne accept Medicare assignment?
- Yes. Medicare's clinician data says Marilu O Byrne accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Marilu O Byrne see?
- In 2024, CMS data shows 1,015 Original Medicare patients and 3,091 services for Marilu O Byrne. This counts Original Medicare only and measures volume, not quality.
- What is Marilu O Byrne's NPI number?
- 1083772453. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Marilu O Byrne, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,015 |
|---|---|
| Services billed to Medicare | 3,091 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient complete exam of visual system (92014)992 services
- Extended exam of the back part of the eye with optic nerve drawing (92202)355 services
- Measurement of corneal curvature and depth of eye (92136)308 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)203 services
- Imaging of optic nerve (92133)181 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Ischemic heart disease30%
- Diabetes29%
- Anxiety23%
Hospitals where Marilu O Byrne works
Medicare's Facility Affiliation Data lists Marilu O Byrne at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Sterling Surgical HospitalSlidell, LA · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 190256
Practice locations
Addresses where Marilu O Byrne is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 120 Ochsner BlvdGretna, LA 70056 (504) 391‑7545
- 120 Ochsner Blvd, Suite 210Gretna, LA 70056 (504) 391‑7545
- 1580 W Causeway Approach, Suite 3Mandeville, LA 70471 (504) 218‑4936
- 2160 Gause Blvd E, Suite 101Slidell, LA 70461 (504) 218‑4936
- 2600 Belle Chasse Hwy, Suite GTerrytown, LA 70056 (504) 218‑4936
Group practices
Medicare enrollment lists Marilu O Byrne as a member of these groups (CMS data updated October 2, 2026).
- Benjamin Guidry MD, LLC6 clinicians in the group
- Eye Associates LLC6 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Gretna
Clinicians with the same Medicare primary specialty in Gretna, LA — not a recommendation.
Other clinicians in Benjamin Guidry MD, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Louisiana State University School Of Medicine In New Orleans |
| Graduation year | 1981 (45 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1083772453 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians