KATHRYN MIZERA O'NEIL M.D.
NPI 1114280765
Emergency Medicine in San Diego, CA

Q: What is Kathryn O'neil's NPI number?

The NPI number for Kathryn O'neil is 1114280765. It was assigned to this individual provider in the NPPES registry on June 19, 2012. The provider is also known as Kathryn Mizera.

Q: What is Kathryn O'neil's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Kathryn O'neil was last updated on April 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 19, 2012PECOS EnrolledAccepts Medicare Assignment

34800 BOB WILSON DR, SAN DIEGO, CA 92134(773) 501-9673 Get Directions Write a Review

NPPES record last updated: April 7, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 7, 2026, May 4, 2023, Jan 18, 2016 (3 updates tracked since 2016).

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About Kathryn Mizera O'neil M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATHRYN MIZERA O'NEIL M.D. (NPI 1114280765) is an individual emergency medicine provider in San Diego, California, licensed in Alabama (MD.52162) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, is affiliated with Banner Churchill Community Hospital, and maintains a secondary practice location in Opelika.

NPPES Registry Identity

NPI1114280765

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NameKATHRYN MIZERA O'NEILCredential: M.D.

Location Address34800 BOB WILSON DRSan Diego, CA 92134-1098

Mailing Address2000 Pepperell PkwyOpelika, AL 36801-5452

Phone(773) 501-9673

Sole ProprietorNo

Medical School CMSRush Medical College Of Rush UniversityGraduated 2012

Enumeration DateJune 19, 2012

Last NPPES UpdateApril 7, 20263 updates tracked since enumeration

NPPES CertifiedApril 7, 2026

✔ NPI 1114280765 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

Licenses✔ Licensed in AL · MD.52162✔ Licensed in MS · 23708✔ Licensed in NV · 23241

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

34800 BOB WILSON DR, San Diego, CA 92134

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Other Names 1

Former Name (1)Kathryn Mizera

Secondary Practice Location 1

Location 12000 Pepperell PkwyOpelika, AL 36801-5452 · Phone (334) 749-3411

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Magnolia Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Kathryn Mizera O'neil M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6406168889

PECOS Enrollment IDI20230607002508, I20260602002543

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

113 services108 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

49 services49 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

15 services15 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Banner Churchill Community Hospital

Critical Access Hospitals · Fallon, NV

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number291313

Location801 East Williams AvenueFallon, NV 89406 · Churchill County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92134 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$94.87 typical visit price

range $62.10 – $184.71

Typical copayment $23.71 (range $15.52 – $46.17)

Most-billed visit code 99203

Established Patient

$108.42 typical visit price

range $20.62 – $151.42

Typical copayment $27.10 (range $5.15 – $37.85)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LORENA MARIE FUJII N.P.

Nurse Practitioner (Pediatrics)