Ellyn Marks O'Neal, DDS
Dentist · Baton Rouge, LA
Ellyn Marks O'Neal, DDS is a dentist with a practice address in Baton Rouge, Louisiana, and NPI 1265923635, issued on May 22, 2018. Check the license (Louisiana 6854, as entered in NPPES) with the Louisiana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ellyn Marks O'Neal
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License number
- 6854 LA
Self-reported in NPPES; status is on the state search - Practice location
- 11424 Sullivan RD, Baton Rouge, LA 70818
- Phone
- (225) 715-9990
- Enumerated
- May 22, 2018
- Record last updated
- Jul 10, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dentist records → All 898 in Louisiana → Look up another NPI →
Also registered at 11424 Sullivan RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Kelley, PTPhysical Therapist1770656621
- Myriam Ortiz-De Jesus', MDPediatrics Physician1033162300
- Robin Shoun, NPFamily Nurse Practitioner1144561408
- Harsimar Singh, MDFamily Medicine Physician1841968930
- Brittany WillisPhysical Therapist1811443120
Verify Ellyn Marks O'Neal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Louisiana board licenses this profession
Search for license 6854Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average dentist in 2024
56 Medicare Part D claims for 37 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin21 claims
- Azithromycin14 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.
Industry payments in 2024: $114.39
5 payments; by number, the most common kind was food and beverage; the largest payer was Zimvie Inc. The 31,974 providers of this specialty with any payment received $540.36 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.
Ellyn Marks O'Neal among 898 dentist records in Louisiana
Ellyn Marks O'Neal, DDS is one of 898 dentist records with a practice address in Louisiana. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 69% of them.
- NPI issued2018 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 1% of these records are
- Record last updated2019 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dentist providers in Louisiana
There are 898 dentist records in Louisiana.
All 898 in Louisiana → Every provider in Baton Rouge → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- James Hebert, D.D.S.Baton Rouge, LA 708181992837710
- Ross Lang, DMDBaton Rouge, LA 708181548936388
- Benjamin Record, D.D.S.Baton Rouge, LA 708181568410314
- Vincent Williams, DDSBaton Rouge, LA 708181962993535
- Jacob Henderson, D.D.S.Baton Rouge, LA 708171205960424
- Shelly Joachim, DDSBaton Rouge, LA 708171992839583
- Seth O'Shee, DDSBaton Rouge, LA 708171487145165
- Andrew Robertson, D.D.S.Baton Rouge, LA 708171093109597
Common questions
What is Ellyn Marks O'Neal, DDS's NPI number?
Ellyn Marks O'Neal, DDS's National Provider Identifier (NPI) is 1265923635, issued on May 22, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Ellyn Marks O'Neal, DDS located?
The NPPES record lists a practice address at 11424 Sullivan RD, Baton Rouge, LA, 70818. Phone: (225) 715-9990. Providers update this record themselves, so call before visiting.
How can I verify Ellyn Marks O'Neal, DDS's license?
NPPES lists Louisiana license number 6854, as entered by the provider. Search the Louisiana board that licenses this profession; the NPPES record confirms identity only.
How much does Ellyn Marks O'Neal, DDS prescribe under Medicare Part D?
In 2024, Ellyn Marks O'Neal, DDS had 56 Medicare Part D claims for 37 beneficiaries; the average among dentist prescribers was 86. Part D covers Medicare prescriptions only.
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.