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Dr. Peter G. Konyn, MD

Gastroenterology (Gastroenterology Physician)

300 Pasteur Dr
Stanford, CA 94305

Who else practices at this address →

Santa Clara County includes mental health (13% of residents) shortage areas. About shortage areas

Call (650) 723-4000

At a glance

In the NPI registry since
2019

Licensed in California since 2022, 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

  • 2019Registered 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

  • Gastroenterology Physician primary
    CA license A178123 (first issued 2022; current)
  • Internal Medicine Physician
    CA license A178123 (first issued 2022; current)

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

Map: Gastroenterology per capita by county →

Medicare patients and services

Most frequent Medicare services, 2023
ServiceTimesPatients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes7230
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes2716
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes2424
Hospital discharge day management, more than 30 minutes1313
Hospital discharge day management, 30 minutes or less1212
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes1212

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Payments from drug and device companies

In 2025, 4 companies reported 25 payments worth $20,105 in total to this clinician.

By company
Olympus America Inc.$19,784
Janssen Biotech, Inc.$120
Gilead Sciences, Inc.$101
Olympus Corporation of The Americas$99.28
By type
Consulting Fee$18,590
Travel and Lodging$992
Food and Beverage$523

What the payments were for

Largest payments other than meals
DateCompanyWhat it was forAmount
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$5,280
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$4,180
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$3,520
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$2,640
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$880
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$880
Jan 9, 2025Olympus America Inc.
Jan 9, 2025
Travel and Lodging
Single Use Aspiration Needle NA-U200H · Endotherapy · travel to Tampa, FL · in-kind
$476
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$440
Jun 17, 2025Olympus America Inc.
Jun 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$440
Jan 30, 2025Olympus America Inc.
Jan 30, 2025
Travel and Lodging
Single Use Aspiration Needle NA-U200H · Endotherapy · travel to Tampa, FL · in-kind
$349
All 17 payments other than meals, newest first
All payments other than meals
DateCompanyWhat it was forAmount
Jun 17, 2025Olympus America Inc.
Jun 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$440
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$4,180
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$3,520
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$880
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$880
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Travel and Lodging
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology · travel to Tampa, FL · in-kind
$31.28
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Travel and Lodging
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology · travel to Tampa, FL · in-kind
$30.26
Apr 17, 2025Olympus America Inc.
Apr 17, 2025
Travel and Lodging
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology · travel to Tampa, FL · in-kind
$28.99
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$5,280
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$2,640
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$440
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$165
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Consulting Fee
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology
$165
Mar 19, 2025Olympus America Inc.
Mar 19, 2025
Travel and Lodging
EVIS EUS ENDOSCOPIC ULTRASOUND CENTER; EVIS EXERA II ULTRASOUND GASTROVIDEOSCOPE · Gastroenterology · travel to Westborough, MA · in-kind
$41.61
Jan 30, 2025Olympus America Inc.
Jan 30, 2025
Travel and Lodging
Single Use Aspiration Needle NA-U200H · Endotherapy · travel to Tampa, FL · in-kind
$349
Jan 9, 2025Olympus America Inc.
Jan 9, 2025
Travel and Lodging
Single Use Aspiration Needle NA-U200H · Endotherapy · travel to Tampa, FL · in-kind
$476
Jan 9, 2025Olympus America Inc.
Jan 9, 2025
Travel and Lodging
Single Use Aspiration Needle NA-U200H · Endotherapy · travel to Tampa, FL · in-kind
$35.00

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 Gastroenterology clinicians in Stanford

Sources

NPI registry (CMS NPPES, November 2026; record last updated July 2, 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 1295294049. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.