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Dr. Mark E. Barry, M.D.

General Surgery (Surgery Physician)

At a glance

In the NPI registry since
2017

Licensed in California since 2019, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is

Education and training

  • 2017Registered with an NPI (national billing number; not a license date)

Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Surgery Physician primary
    CA license A160801 (first issued 2019; current) · WA license 61555976 (first issued 2024; active)

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: General Surgery per capita by county →

Medicare prescriptions

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Oxycodone Hcl
Other prescribers in Oakland, CA
11

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Payments from drug and device companies

In 2025, 3 companies reported 12 payments worth $2,003 in total to this clinician.

By company
Atricure, Inc.$1,922
Karl Storz Endoscopy-america$66.52
Alcresta Therapeutics, Inc.$14.72
By type
Travel and Lodging$1,498
Food and Beverage$505

What the payments were for

Largest payments other than meals
DateCompanyWhat it was forAmount
Jan 21, 2025Atricure, Inc.
Jan 21, 2025
Travel and Lodging
AtriCure cryoICE Cryoablation System (CRYO2) · CARDIOVASCULAR · travel to PHOENIX, AZ · in-kind
$654
Feb 20, 2025Atricure, Inc.
Feb 20, 2025
Travel and Lodging
AtriCure cryoICE Cryoablation System (CRYO2) · CARDIOVASCULAR · travel to PHEONIX, AZ · in-kind
$651
Feb 21, 2025Atricure, Inc.
Feb 21, 2025
Travel and Lodging
AtriCure cryoICE Cryoablation System (CRYO2) · CARDIOVASCULAR · travel to PHOENIX, AZ · in-kind
$194

Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.

From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.

Who received the most in California →

Other General Surgery clinicians in Oakland

Sources

NPI registry (CMS NPPES, November 2026; record last updated September 23, 2026), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1659802304. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.