Michael Sim, NP-C
Practice: Unio Specialty Care
Specialty: Gastroenterology: Nurse Practitioner
Office locations: Pasadena, CA
Michael Sim, NP-C, is a board-certified Nurse Practitioner whose clinical focus is Gastroenterology, with a special interest in the microbiome. He earned a bachelor’s degree in psychology from West Chester University in Pennsylvania, then completed Azusa Pacific’s Nursing Program, earning a second bachelor’s degree and a master’s degree as a Nurse Practitioner, and graduating at the top of his class.
Michael Sim, NP-C, is a board-certified Nurse Practitioner whose clinical focus is Gastroenterology, with a special interest in the microbiome. He earned a bachelor’s degree in psychology from West Chester University in Pennsylvania, then completed Azusa Pacific’s Nursing Program, earning a second bachelor’s degree and a master’s degree as a Nurse Practitioner, and graduating at the top of his class.
GI-Pasadena - Congress Street
Suite 410
Pasadena, CA
Michael Sim, NP-C, is originally from Pennsylvania, where he attended West Chester University and earned a bachelor’s in psychology. Upon moving to California, Michael completed Azusa Pacific’s Nursing Program, earning a second bachelor’s as well as a master’s degree as a Nurse Practitioner. He is not only board-certified but also graduated at the top of his class.
After graduating, Michael worked at Huntington Hospital on the Cardiothoracic Unit. He is especially interested in the microbiome and stays up to date on the latest research and evidence-based care in Gastroenterology. Michael strives to deliver compassionate care and timely responses for all his patients.
His clinical focus is Gastroenterology. In his free time, Michael enjoys spending time with his family, working out, and playing tennis.

Easy to talk to, knowledgeable.
He was great. Asked great questions and made me feel comfortable.
Micheal is Amazing! He listen to you and he cares about your health and making you feel better asap.
Very knowledgeable person, he has a heart of a teacher. Very pleased with his patience and understanding my concern. Overall I had a great experience with Michael Sim.
Attentive, very knowledgeable and articulate. Highly recommend.
Focus on my medical changes, check for medication changes , next steps. Assurance based on facts.
Excellent felt very comfortable.
Dart man!
Very friendly and explained everything clearly.
He is knowledgeable and listened to my concerns