Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Kathryn Mizera O'Neil, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1114280765

Kathryn Mizera O'Neil, MD practises Emergency Medicine in San Diego, California. Graduated from Rush Medical College of Rush University in 2012, 14 years ago. Practices with The East Alabama Health Care Authority, a 116-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Alabama, Mississippi and Nevada.

Years since qualifying
14
Trained at
Rush Medical College of Rush University
Licensed in
AL, MS, NV
In the registry since
2012
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

San Diego, CA

No coordinates on file. Search this address in Google Maps

Additional practice locations (1)

  • 2000 Pepperell Pkwy, Opelika, AL 36801-5452 — (334) 749-3411

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence MD.52162 (AL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Emergency Medicine Physician Taxonomy 207P00000X · Licence 23708 (MS)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 23241 (NV)

Record details

NPI number1114280765
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 19, 2012
Last updated in NPPESApril 7, 2026
Certification dateApril 7, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 2012 (14 years in practice)
Group practice The East Alabama Health Care Authority — 116 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients174
Services billed 197 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at The East Alabama Health Care Authority

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 116 clinicians in the practice; 12 are shown here.

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