“First Doctor” Confirmed: Jung Ryeo Won Leads Netflix’s Next Big Medical Drama

Netflix has officially greenlit its newest medical drama, “First Doctor,” and the cast lineup alone is enough to get K-drama fans excited. Confirmed on June 23, the series brings together Jung Ryeo Won, Ha Yun Kyung, Kim Moo Yul, Baek Hyun Jin, and Kim Jong Soo in a story set inside a pediatric surgery department fighting to stay open.

A Doctor Pushed to Her Limits

Jung Ryeo Won leads as Heo Ji Wan, a pediatric surgery professor known for her exceptional skill but blunt, no-nonsense personality that’s earned her a “troublemaker” reputation at the hospital. After an unexpected incident forces her back to Yeonhwa University Hospital, she finds herself fighting to save the very pediatric department that’s on the verge of shutting down.

Standing in her way — and pushing her forward — is Ki Eun Gyeol (Ha Yun Kyung), a sharp, spirited third-year resident whose talent caught the surgery head’s attention early. Their dynamic promises tension layered with an unexpected mentor-mentee chemistry.

For more K-drama casting news and premiere updates, check out TechnoSports’ entertainment coverage.

A Cast Backed by Heavyweight Talent

Veteran actors round out the ensemble: Baek Hyun Jin plays the head of surgery, Kim Jong Soo takes on the hospital’s vice director, and Kim Moo Yul — who recently won global fans through Teach You A Lesson — joins as a warm-hearted anesthesiology professor. Notably, this marks Kim Moo Yul’s third collaboration with director Hong Jong Chan, following Juvenile Justice and Teach You A Lesson.

First Doctor Cast: Overview

With reuniting talent from director Hong Jong Chan‘s previous Netflix hits, expectations are already high for this medical drama, set to begin filming in the second half of 2026.

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