Our Providers

Timothy Richardson, MD

A native of California, Dr. Richardson is a magna cum laude graduate of Loyola Marymount University in Los Angeles, where he received a Bachelor of Science degree in Biology. He earned his Doctor of Medicine degree at Georgetown University School of Medicine in Washington, D.C. Dr. Richardson completed residencies in both internal medicine and dermatology at Loma Linda University Medical Center, and is board certified in both specialties. He then further pursued his interest in skin cancer by completing a fellowship training program in Mohs micrographic surgery and surgical reconstruction also at Loma Linda. He subsequently became a member of the Mohs College.

Dr. Richardson, named a top doctor every year over the past 11 years by Palm Springs Life Magazine, and is still one of only a few dermatologists in the Valley to receive such recognition.

Prior to pursuing private practice, Dr. Richardson was an Assistant Professor of Medicine at Loma Linda University Medical School. He is presently a member of many professional organizations including the American Academy of Dermatology, the American Society for Dermatologic Surgery, the American College of Mohs Micrographic Surgery and Cutaneous Oncology, and the California Society of Dermatology and Dermatologic Surgery.

Moriah Barboza, CFNP

Moriah Barboza is a licensed and registered Nurse Practitioner, certified by the California Board of Registered Nursing. She is a member of the Dermatology Nurses’ Association.

Born and raised in California, she graduated from Pacific Union College with a Bachelor of Science in Nursing and continued her education at Loma Linda University to earn her Master of Science degree in Nursing. She received her certification through the American Academy of Nurse Practitioners. Moriah joined Mirage Dermatology in 2010 as a nurse practitioner and has been an incredible asset to our practice. She is dedicated to providing high quality skin cancer care to our patients.

Our Location

Find us on the map

Office hours

Our regular schedule


8:30 am-4:00 pm


8:30 am-4:00 pm


8:30 am-4:00 pm


8:30 am-4:00 pm


8:30 am-12:00 pm





  • "Now that I am back home I have to express by appreciation to you and your office. Thanks for the courtesies and of course the “Best” medical attention."
    L.L., Rancho Mirage
  • "Just a short note to say thank you for all you have done for me over the past few months. I knew I was in good hands the first time I met you. I do appreciate the outstanding professionalism demonstrated by all staff on board. You all make up a great group of people, all of whom I´m proud to call friends."
    D.L., Rancho Mirage
  • "I cannot thank you and your wonderful staff associates enough for the superb care you all gave me this year. These were trying times for me and every one in your office pitched in to make my surgical recoveries easier on me. One seldom sees such caring in these times."
    A.H., Palm Desert
  • "I want to thank you not only for making my nose cancer free, but also for working so diligently to make my nose look great! I greatly appreciate the work you do and how conscientiously you made every effort to enhance my health and appearance."
    T. L., Rancho Mirage
  • "Thank you to each of you for your kind and caring attitude throughout my visits to your office. Dr. Richardson, you are a wonderful example of how a doctor´s office should and is being run!"
    E. L., Rancho Mirage