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Emergency Medicine in National City, California

Data updated monthly · Last refresh September 2026

13 Emergency Medicine providers practice in National City. Listings are drawn from federal public records and are not endorsements.

Emergency Medicine providers in National City

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Allison Kornblatt, M.D.
National City, CA · No drug or device payments recorded (2025) · (917) 699-6856
Dr. Allyson Wolfe, M.D.
National City, CA · No drug or device payments recorded (2025) · (619) 470-4141
Dr. Anthony Ferkich, M.D.
National City, CA · No drug or device payments recorded (2025) · (619) 470-4321
Dr. Benjamin Ross, MD
National City, CA · No drug or device payments recorded (2025) · (619) 470-4321
Dr. Dennis O'connor, M.D./M.P.H.
National City, CA · No drug or device payments recorded (2025) · (760) 310-5658
Dr. Douglas Ballesteros, MD
National City, CA · No drug or device payments recorded (2025) · (619) 470-4321
Dr. Gary Polsfuss, M.D.
National City, CA · No drug or device payments recorded (2025) · (619) 470-4321
Dr. Jason Roby, D.O.
National City, CA · No drug or device payments recorded (2025) · (616) 470-4158
Dr. Jorge Martinez, D.O.
National City, CA · $20 in drug and device payments (2025) · (619) 470-4141
Dr. Lowell Gaspar, M.D.
National City, CA · No drug or device payments recorded (2025) · (619) 470-4141
Dr. Nima Jalali
National City, CA · No drug or device payments recorded (2025) · (619) 470-4141
Dr. Paul Manos, D.O.
National City, CA · No drug or device payments recorded (2025) · (619) 470-4321
Dr. Scott Mataoa, M.D.
National City, CA · No drug or device payments recorded (2025) · (619) 470-4321

Common questions

How many Emergency Medicine providers are in National City, California?

There are 13 Emergency Medicine providers with active NPI records practicing in National City, according to federal NPPES data refreshed monthly.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in National City Emergency Medicine across California

Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.