Doctors

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Michael Chan, M.D.

Dr Michael Chan, a native of San Francisco, earned his undergraduate degree in Molecular and Cell Biology from the University of California at Berkeley and a Masters in Biomedical Science from Barry University, Florida. Dr Chan received his medical degree from the Medical College of Ohio and completed his Neurosurgery residency at the University of Illinois at Chicago. 

Dr Chan has surgical privileges at Mercy General Hospital and Sutter Medical Center. He currently serves as an instructor of neurosurgery for UC Davis students as well as for students of the newly formed California Northstate University College of Medicine. He also serves as an expert medical reviewer for the Medical Board of California.

Board certified in Neurological Surgery, he has special interests in the treatment of skull base tumors and vascular lesions such as brain aneurysms and arteriovenous malformations. He is experienced in using advanced techniques such as frameless stereotactic navigation for tumor surgery, as well as minimally invasive endoscopic techniques for treatment of pituitary tumors. His background in skull base surgery also allows him to treat complex conditions such as trigeminal neuralgia as well as vestibular schwannoma. He also has extensive experience with surgery of the cervical, thoracic and lumbar spine, utilizing advanced techniques such as spinal fusion through minimal access to treat degenerative conditions, deformities, trauma and spinal tumors. 

Dr Chan believes that educating his patients and their families on their conditions promotes the partnership that helps them make the best choices in the management of their health.

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Kevin Hsieh, M.D.

Dr. Hsieh (pronounced ‘Shay’) is a native of the Los Angeles area. He graduated from the University of California, Berkeley in 1998 with a degree in Neurobiology, majoring in molecular cell biology with an emphasis in neurobiology and minoring in music.  Following completion of his undergraduate degree, Dr. Hsieh received his M.D. at the Vanderbilt University School of Medicine in Nashville, Tennessee, where he served as President of the Vanderbilt Honor Council. Dr. Hsieh’s neurosurgical residency was completed within the NYU Hospital System at the Department of Neurosurgery at NYU Langone, followed by a year as Chief Resident at Bellevue Hospital.

In addition to his passion for medicine, Dr. Hsieh is an accomplished musician, playing both piano and violin. He credits his training as a classical musician with providing a unique perspective and approach to medicine in general, and more specifically to advanced and complex surgery.  Dr. Hsieh spent six years in Atlanta in private practice before coming home to California. He received his Board Certification in 2013. Dr. Hsieh currently serves as the Chief of Neurosurgery for Hill Physicians.

Dr. Hsieh takes a balanced approach to each patient’s needs and takes the time to truly listen to the outcome the patient hopes for. Where surgery is indicated, he specializes in the newest and most innovative of techniques. He also has consulted with multiple spinal instrumentation companies in development of expandable cages as well as custom rods for deformity surgery.

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Danielle Derosa, PA-C.

Danielle joined the practice in 2025. She is originally from the Sacramento area and grew up in Rocklin.  She moved to San Diego for college where she pursued an undergraduate degree in Biology at San Diego State University while playing soccer. She then moved to New York to continue her education at Long Island University- Brooklyn where she received her master’s degree in Health Science and Physician Assistant studies. She assists in the operating room, meets with new patients, and provides care after surgery. She works closely with the physicians to help provide exceptional care to our patients. During her free time she enjoys skiing, reading, and spending time with friends and family. 

Staff

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Erika, Practice Administrator

Erika joined us in 2024 as our Practice Administrator.  She has over 25 years’ experience in the medical field with over 15 years in managerial and administrative roles.  She has a passion for the medical field and enjoys helping people. She oversees the office as a whole, as well as lending support to the physicians.  Erika’s years of experience allows her to mentor and guide new staff and she prides herself in a job well done. She loves to spend her off time with her two children and extended family. 

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Stephanie, Surgery Coordinator for Dr. Chan

Stephanie joined CNS in 2017.  She has 10 years of experience in the medical field.  She enjoys the fast-paced environment of surgery scheduling and working closely with patients through the pre and post-operative phases. She takes great pride in helping patients get through the surgical process, making sure it goes as smoothly as possible. On her days off, she likes to spend her time outside with her family and horses. 

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McKenna, Surgery Coordinator for Dr. Hsieh

McKenna joined our team in 2024. She is passionate about providing high-quality patient care with compassion and respect. She prides herself on being a team player that always has a positive attitude and a smile on her face. Her favorite part of her job is working closely/building relationships with patients from the beginning to the end of the surgery process.  When not working, she enjoys spending time with her husband, friends, and family, crafting, and being a dog mom.

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Melanie, Referral Coordinator

Melanie joined our team in 2025, bringing with her a strong background in medical administration. She plays a vital role in helping patients explore and understand non-surgical treatment options, including physical therapy and pain management. Melanie’s favorite part of her job is building relationships with the patients who come into the office and making them feel comfortable and supported throughout their care journey.

Outside of work, Melanie enjoys reading, gardening, and spending quality time with her beloved cats.