Dr. Harstroem was born and raised in Sweden. She earned her Doctor of Medicine degree at the Medical University of Lublin, where she graduated with the Highest Achievement Award. During her clinical training, she received Honors with Distinction degrees as an exchange student at Harvard Medical School, MA, as well as during her time at Cornell University-affiliated hospitals in NYC.

After medical school, Dr. Harstroem completed her internship and anesthesiology residency at Wake Forest University, NC, where she trained and conducted research with some of the leaders and world-renowned pioneers in the field of pain medicine and neuromodulation. This inspired her to further specialize within this developing field, and she subsequently completed a fellowship in Interventional Pain Management at Virginia Mason Hospital in Seattle. She is a member of the American Society of Regional Anesthesia and Pain Medicine, North American Neuromodulation Society, Spine Intervention Society, American Interventional Headache Society, as well as the American Society of Anesthesiologists.

Dr. Harstroem focuses on a comprehensive, multimodal approach to improve pain and functionality, with an emphasis on interventional procedures to limit opioid usage. Her goal is to see her patients return to the activities they enjoyed before they were limited by chronic pain conditions.

Dr. Ho Dzung, M.D. is double-board certified in pain management and anesthesiology and has been practicing in pain management for over 15 years.

Ho received his Bachelor of Science in Biology at Georgetown University and his Doctor of Medicine degree from Medical College of Virginia Richmond. Ho was previously a partner at Innovative Pain Care Center in Las Vegas, Nevada and also the owner of Mend Healthcare Telemedicine.

Ho has extensive experience as an interventional pain physician and a frequent speaker and lecturer on advanced therapies.

Dr. Song is a highly skilled specialist dedicated to helping you restore comfort, regain mobility, and improve your overall quality of life. He relocates to the Pacific Northwest from Phoenix, Arizona, where he spent five years running a high-volume practice. During his time there, he built an exceptional reputation for patient outcomes, earning a stellar 4.8-star Google rating from those in his care.

Dr. Song completed advanced specialty Fellowship training at the world-renowned MD Anderson Cancer Center. He is Board-Certified in Physical Medicine & Rehabilitation and specializes in modern, procedure-based treatments. In addition to his clinical work, Dr. Song is an active researcher and published author who has contributed to national clinical trials exploring advanced therapies for long-term pain relief.

Dr. Song is truly passionate about what he does inside the clinic, but he is equally excited to call the PNW his new home! Outside of work, he loves exploring the great outdoors, taking in the beautiful Washington nature, and staying active. He is also an avid foodie and can’t wait to discover local restaurants and new flavors across our community.

Jason Chang was born in Taipei, Taiwan, after his parents moved there from China. However, he has called Seattle home since the 1980s. He is a graduate of the University of Washington, where he earned both his Doctorate and Bachelor’s degrees in Nursing. He is a board-certified geriatrician with over 17 years of clinical experience across various settings, including perioperative anesthesia and medicine, primary care, mental health, and multiple acute care hospital wards. Prior to becoming a healthcare provider, he worked as a registered nurse at the Seattle Veterans Affairs inpatient oncology ward and later on a medical-surgical floor.

Dr. Chang joined Anesis Spine and Pain Care in 2025, believing his background could help alleviate pain and suffering for those in need. In addition to his role at Anesis, he continues to work in mental health, specializing in ketamine therapy for the treatment of various mood disorders, as well as at the Seattle Veterans Affairs perioperative anesthesia clinic. His approach to medicine is patient-centered and collaborative, involving both the patient and multidisciplinary teams. He believes that, in addition to addressing health problems at their source, a clinician’s approach to care should foster trust, empathy, and compassion in order to maximize health outcomes.

In his downtime, he enjoys consuming a healthy dose of cinema in all forms. He’s not entirely sedentary, as exercise is an essential part of his daily routine, and he prefers kickboxing or boxing for conditioning. Growing up, sports and martial arts were a significant part of his life and continue to play an integral role in maintaining his health and sense of balance. Counteracting his physical fitness efforts, he also enjoys cooking and experimenting with new recipes. Often, kitchen mishaps lead to culinary adventures at new restaurants. Before entering healthcare, he worked in his family’s restaurants. During college, he continued working as a server and bartender until beginning his journey into the medical field. In another lifetime, his dreams would have been to become a fighter pilot, an astronaut, or a race car driver.

Carolyn Nartnik is an Advanced Registered Nurse Practitioner with a strong foundation in critical care and a diverse background across several medical specialties, including intensive care, long-term care, vascular surgery, cardiology, interventional pain management, and family practice. She earned her Master’s degree from Chamberlain University and brings both clinical expertise and compassionate care to every patient interaction.

Known for her calm presence and collaborative spirit, Carolyn is dedicated to delivering evidence-based, holistic care tailored to individual patient needs. Outside of work, she’s an avid traveler who loves going on cruises, especially anything involving Disney. A proud Seattle Kraken fan, Carolyn brings the same passion and energy to her practice as she does to cheering on her favorite hockey team.

Byron was born in Germany, and was raised in multiple locations, most prominently southwest Germany, northern New York, and central coast California. He earned his degree as a primary care adult gerontology nurse practitioner from Yale University in May 2021, with a strong emphasis in community care, neurology, and preventative medicine. Before becoming a nurse practitioner, his previous career involved luxury sales and marketing in California, as he completed his undergraduate degree at Northern Arizona University in Hotel and Restaurant Management.

Byron’s clinical interests include relieving chronic pain through routine exercise, steroid-based procedures, mindfulness techniques, and considering the patient’s entire medical profile. He also strongly believes that empathy, compassion, and active listening are integral to patient-provider relationships and patient well-being.

In his personal life, Byron greatly enjoys snowboarding in the winters, golfing in the summers, and challenging himself with local trivia nights in all seasons.