Dermatology Providers

D. Hsu , MD

Board Certified Radiation Oncologist

Dr. Hsu was born and raised in Taiwan and immigrated to the US when he was 14. After graduating from San Marino High School, he received his BA degree in Biology from UC Berkeley. He received his MD and MBA degrees from Creighton University in Omaha, NE.

He completed his residency in Radiation Oncology at Loyola University Medical Center in Chicago. Dr. Hsu also received MPH (Master of Public Health) degree from the University of Illinois at Chicago. After completing his residency, he practiced at Eisenhower Medical Center in Rancho Mirage, CA. He then moved to Omaha, NE to help build and develop a brand new cancer center there and practiced as the head of radiation oncology.

Clinical Expertise

  • General Radiation Oncology
  • 3D Conformal Radiation Therapy (3DCRT)
  • Intensity Modulated Radiation Therapy (IMRT)
  • Image Guided Radiation Therapy (IGRT)
  • Stereotactic Radiosurgery (SRS)
  • Stereotactic Body Radiosurgery (SBRT)
  • Prostate seed implantation
  • LDR and HDR brachytherapy
D. Hsu , <small>MD</small>

K. Chung , NP-C

Board Certified Nurse Practitioner

Ms. Chung is certified by the American Academy of Nurse Practitioners. She was trained at the University of California, Irvine. Prior to nursing, she was a yoga instructor in the San Francisco Bay Area. Her passion for a healthy lifestyle and helping others guided her career in nursing. Ms. Chung worked as a Nurse Practitioner in Family Medicine and as a Certified Registered Nurse in the operating room. Her ambition was to eventually specialize in dermatology, which led her to join OC Skin Institute. She is committed to providing quality and compassionate care to her patients, while integrating the entire well-being into treating dermatological conditions.


  • University of California, Irvine – Master of Science – concentration in Family Nurse Practitioner
  • University of California, Irvine – Bachelor of Science – concentration in Nursing Science


  • Yoga, boxing, hiking, traveling
K. Chung , <small>NP-C</small>

M. Eshoiee , PA-C

Board Certified Physician Assistant

Ms. Eshoiee is a board-certified Physician Assistant and was raised in Orange County. She received her Bachelor's degree at the University of California, Irvine and later joined the physician assistant graduate program at the University of California, Davis. Upon graduating, she moved back to Southern California to be closer to family and begin her career. Her passion has always been to help others and this is what she strives to do every day. She enjoys taking the time to speak with patients and helping them with their dermatological conditions in any way she can. In her spare time, she enjoys spending time with her family and friends, going to Disneyland, and watching movies.


  • Master of Health Services, University of California, Davis
  • Physician Assistant Studies, University of California, Davis
  • Bachelor of Science, University of California, Irvine
M. Eshoiee , <small>PA-C</small>

M. Kwong , PA-C

Board Certified Physician Assistant

Ms. Kwong is a board-certified Physician Assistant who joined OC Skin Institute in 2017. She received her Bachelors at University of Washington and Masters of Physician Assistant Studies at James Madison University. After her studies, she returned to Orange County to work at breast cancer and plastic reconstruction clinic for a few years. That job cemented her passion to work with cancer patients and honed her surgery and suturing skills, which are important to her job now at OC Skin Institute. She strives to provide excellent patient care and to continue to learn more. In her free time, Ms. Kwong enjoys spending time at home with her husband and two daughters. She also enjoys watching movies and looking up food recipes to try.


  • Master of Physician Assistant Studies, James Madison University, 2011 – 2013
  • Bachelor of Arts in Psychology, Minors in Diversity and Public Health, University of Washington, 2004–2008
  • NCCPA board certified, current California State Physician Assistant license, current DEA license
M. Kwong , <small>PA-C</small>

I. De La Cruz

Chief Radiation Therapist

Mr. De La Cruz graduated from California State University of Long Beach with a Bachelor of Science-Health Science Option in Radiation Therapy. As a student, he completed his radiation therapy internships at University of California Irvine Medical Center, UCLA Reagan Medical Center, Long Beach Memorial, and Presbyterian Intercommunity Hospital.

He was one of the first Radiation Therapists in SoCal, to work with Electronic Brachytherapy specializing in skin radiation therapy, alongside Dr. Hsu in 2013. He helped start our services in 2014, before leaving to work and hone his skills as a radiation therapist under other institutions, but he is now back as our Chief Radiation Therapist.

I. De La Cruz
Office Background