Surgeon profile

Chester Zahn, MD

Gastroenterology · San Gabriel, CA 91776NPI 1639146442

Database refreshed July 2026Live NPPES registry· Industry payments CY2025ⓘ sources

Contactverified live in NPPES · Jul 9, 2026

Active NPI1026 E LAS TUNAS DR, SAN GABRIEL, CA 91776☎ 626-287-7222

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Operates atCMS affiliations, refreshed monthly

USC ARCADIA HOSPITAL · ARCADIA, CAALHAMBRA HOSPITAL MEDICAL CENTER · ALHAMBRA, CASAN GABRIEL VALLEY MEDICAL CENTER · SAN GABRIEL, CAKECK HOSPITAL OF USC · LOS ANGELES, CA

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Tracked procedure volumes

Latest federal claims release with year-over-year momentum. Eight device-heavy specialties tracked — more coming.

255 Medicare cases/yr

251 patients

3 procedures

Procedure	Cases	Trend	Patients
Upper GI Endoscopy (EGD) with Biopsy CPT 43239	164	▲ +7%	162
PEG Feeding Tube Placement CPT 43246	76	▲ +46%	74
Colonoscopy with Biopsy CPT 45380	15	≈ flat	15

Industry relationships

CMS Open Payments, CY2025 general payments (published June 2026) — who already pays this surgeon.

$183 total received, 2025

11 payments

3 manufacturer relationships on file

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Relationship trajectory, 2019–2025

7-year payment trajectory (who's warming up, who's cooling off on this surgeon) is a paid feature. Unlock

Pulling CY2025 industry payments + 7-year history…