About Us
Allen Lawrence, MD, PhD - Medical Director
Dr. Allen Lawrence is the Medical Director of Ozone Medical Corporation and also serves as the Medical Director of Advanced Wellness in Pasadena, California. He has over 30 years of experience in wellness, prevention, functional-integrative medicine, and hormone replacement therapy. Dr. Lawrence believes lifestyle modification, natural treatments, and mind-body-spirit treatments to prevent illness and to improve overall health and well-being.
Dr. Lawrence was traditionally trained at UC Irvine Medical School. He performed his medical internship at USC Los Angeles County Hospital, U.S. Air Force, and a residency in Obstetrics and Gynecology at Cedars Sinai Medical Center. His passion for learning continued as he also pursued a Master’s in Human Nutrition and a Ph.D. in Psychology at the Pacific Institute for Advanced Studies in Los Angeles, California. He also served as a Clinical Instructor and Adjunct Professor for the Department of Obstetrics and Gynecology at UCLA School of Medicine and the Department Obstetrics and Gynecology at Cedars Sinai Medical Center and was a Supervisor and Instructor for the Nurse Practitioner Training program UCLA. Dr. Lawrence has lectured throughout the Continental U.S., Hawaii, Guam, and Mexico.
Dr. Lawrence has authored and published 23 books, written more than 100 articles, and developed many patient education programs discussing natural treatments, methods of prevention, and information on how to regain your health and wellness. Many of his articles, books, and educational programs focus on stress, stress-related illnesses, and healing.
When Dr. Lawrence is not working, he enjoys a long drive, watching movies, and spending time with his girlfriend.
Hannah Grushkowsky, DNP Nurse Practitioner Director
Hannah Grushkowsky, DNP, APRN, FNP-C, AGNP-C is a nationally dual-board-certified Nurse Practitioner specializing in preventive, functional, and longevity medicine. She is board certified in both Adult-Gerontology and Family Practice by the American Academy of Nurse Practitioners (AANP). Hannah graduated with honors from the University of San Diego with a Doctor of Nursing Practice (DNP), the highest level of advanced practice nursing education. Her doctoral research focused on the prevention of functional decline in hospitalized older adults through mobility and evidence-based interventions. Prior to becoming a Nurse Practitioner, she spent six years practicing as an inpatient Registered Nurse in acute care, gaining a strong foundation in complex patient care and clinical medicine.
She earned her Master’s degree from UCLA, where she conducted research exploring the role of calcium supplementation during adolescence. Her work was subsequently published in The Journal of Sports Medicine, reflecting her longstanding commitment to evidence-based health and wellness.
In 2020, Hannah co-founded Dr. Ozone alongside Medical Director Allen Lawrence, MD, with a shared vision of redefining the traditional approach to healthcare. Built around the philosophy that medicine should be proactive rather than reactive, Dr. Ozone was created to provide highly individualized care focused on prevention, health optimization, longevity, and innovative wellness therapies. The practice has since expanded to Las Vegas, Nevada, where the Dr. Ozone location opened in 2024.
Throughout her career, Hannah has continued to pursue advanced education alongside leading experts in functional, integrative, and longevity medicine. She has attended the American Academy of Anti-Aging Medicine (A4M) World Congress in 2023, 2024, and 2025 and has completed specialized training through the Bioidentical Hormone Replacement Therapy (BHRT) Academy. She has also been invited to share her expertise at industry conferences, educational events, and podcasts including the Ozone Convention, the Ozone Therapy MasterClass, the IV BizBash Conference, Wellness by Kelly Retreat, and Biohacking Las Vegas Meeting, where she discusses preventive healthcare, lifestyle medicine, health optimization, and longevity.
For Hannah, learning never stops. She is naturally curious and genuinely passionate about exploring the evolving science of preventive and longevity medicine. Whether attending an advanced training, studying emerging research, or diving into the latest books and literature, she is constantly seeking new ways to deepen her knowledge and bring thoughtful, evidence-informed innovations to her patients.
Outside of medicine, Hannah finds balance through Pilates, Kundalini yoga, time spent in nature, and, most importantly, quality time with the people she loves. She treasures making memories with her husband, their three children, and extended family.
