Katherine Lee Oneil, DO
Emergency Medicine Physician · Southlake, TX
Katherine Lee Oneil, DO is an emergency medicine physician with a practice address in Southlake, Texas, and NPI 1477133114, issued on Apr 8, 2021. Check the license (Texas W4916, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Katherine Lee Oneil
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- W4916 TX
Self-reported in NPPES; status is on the state search - Practice location
- 421 E State Highway 114 # 100, Southlake, TX 76092
- Phone
- (682) 335-2000
- Enumerated
- Apr 8, 2021
- Record last updated
- May 3, 2026
- Medicare enrollment
- Enrolled (PECOS I20241119003066); accepts Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 2021
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Verify Katherine Lee Oneil in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license W4916Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average emergency medicine physician in 2024
155 Medicare Part D claims for 111 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cefdinir18 claims
- Ondansetron Hcl14 claims
- Cyclobenzaprine Hcl11 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.
Bills Medicare through one group practice
- Emergency Medicine Services OF FL LLCAtlantis, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Lee Oneil among 4,885 emergency medicine physician records in Texas
Katherine Lee Oneil, DO is one of 4,885 emergency medicine physician records with a practice address in Texas. 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 2021, is newer than 88% of them.
- NPI issued2021 · 88% of these records are older, 8% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2021 · median 2013 among the 2,779 with a school on file
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Texas
There are 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in Southlake → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- James Dennington, MDSouthlake, TX 760921568538221
- Kristina Dennington, M.D.Southlake, TX 760921457471484
- Richard Jackson, MDSouthlake, TX 760921659328060
- Robert Lapporte, MDSouthlake, TX 760921952339418
- Robert Lutz, MDSouthlake, TX 760921215903075
- Daniel Peckenpaugh, MDSouthlake, TX 760921053387829
- Vijayabhasker Reddy, MDSouthlake, TX 760921144287947
- Kent Taub, MDSouthlake, TX 760921417061607
Common questions
What is Katherine Lee Oneil, DO's NPI number?
Katherine Lee Oneil, DO's National Provider Identifier (NPI) is 1477133114, issued on Apr 8, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Lee Oneil, DO located?
The NPPES record lists a practice address at 421 E State Highway 114 # 100, Southlake, TX, 76092. Phone: (682) 335-2000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Lee Oneil, DO's license?
NPPES lists Texas license number W4916, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Lee Oneil, DO prescribe under Medicare Part D?
In 2024, Katherine Lee Oneil, DO had 155 Medicare Part D claims for 111 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.