Marilu O'Byrne, M.D.
Ophthalmology Physician · Mandeville, LA
Marilu O'Byrne, M.D. is an ophthalmology physician with a practice address in Mandeville, Louisiana, and NPI 1083772453, issued on Dec 5, 2006. Check the license (Louisiana 016256, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Marilu O'Byrne
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 016256 LA
Self-reported in NPPES; status is on the state search - Practice location
- 1580 W Causeway Approach, Mandeville, LA 70471
- Phone
- (985) 624-5573
- Enumerated
- Dec 5, 2006
- Record last updated
- May 29, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (985) 624-9106
- Medicaid ID
- 1318850 LA
- Medicare enrollment
- Enrolled (PECOS I20060104000764); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 1981
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 299 in Louisiana → Look up another NPI →
Also registered at 1580 W Causeway Approach
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marija Lasalle, D.D.S.Periodontics1699873133
- Ralph Nix, MDSpecialist1427026558
- Oliver Whitney, ODOptometrist1912903162
Verify Marilu O'Byrne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 016256Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average ophthalmology physician in 2024
4,129 Medicare Part D claims for 986 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Latanoprost1,204 claims
- Restasis610 claims
- Dorzolamide-Timolol547 claims
- Prednisolone Acetate350 claims
- Ketorolac Tromethamine144 claims
- Cyclosporine128 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 24.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,239.35
46 payments; by number, the most common kind was food and beverage; the largest payer was Johnson & Johnson Surgical Vision, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Benjamin Guidry MD, LLCMandeville, LA
- Eye Associates LLCGretna, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marilu O'Byrne among 299 ophthalmology physician records in Louisiana
Marilu O'Byrne, M.D. is one of 299 ophthalmology physician records with a practice address in Louisiana. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 21% of them.
- NPI issued2006 · 21% of these records are older, 41% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1981 · median 2000 among the 206 with a school on file
- Record last updated2008 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Louisiana
There are 299 ophthalmology physician records in Louisiana.
All 299 in Louisiana → Every provider in Mandeville → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Edward Langlow, MDMandeville, LA 704711407853401
- Andrew Benson, M.D.Slidell, LA 704611639197023
- Candace Collins, MDSlidell, LA 704611710944509
- Terrell Hemelt, M.D.Slidell, LA 704611437177821
- Syamala Reddy, M.D.,Slidell, LA 704611003830274
- Ellen Schneider, MDSlidell, LA 704611851305205
- David Slagle, MDSlidell, LA 704611700878246
- Rudolph Franklin, MDSlidell, LA 704581023015930
Common questions
What is Marilu O'Byrne, M.D.'s NPI number?
Marilu O'Byrne, M.D.'s National Provider Identifier (NPI) is 1083772453, issued on Dec 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marilu O'Byrne, M.D. located?
The NPPES record lists a practice address at 1580 W Causeway Approach, Mandeville, LA, 70471. Phone: (985) 624-5573. Providers update this record themselves, so call before visiting.
How can I verify Marilu O'Byrne, M.D.'s license?
NPPES lists Louisiana license number 016256, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marilu O'Byrne, M.D. prescribe under Medicare Part D?
In 2024, Marilu O'Byrne, M.D. had 4,129 Medicare Part D claims for 986 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Marilu O'Byrne, M.D.'s MIPS final score?
The 2023 MIPS final score is 24.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.