Crossover Health @ North First

(408) 495-5850

145 Nicholson Lane
San Jose, CA 95134

Hours: Mon-Fri 8am to 5pm

Practice walk-through

Your team at North First.

When you start down the path to health and wellness, it’s great to know your team will be with you all the way providing expert knowledge, timely motivation, and even a little inspiration. We share a passionate belief in the power of relationships and look forward to meeting you!

Akbar Zikria, DO

Primary Care

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Akbar is a board certified family physician dedicated to helping his patient’s achieve the highest level of satisfaction with their health. He had done his residency at a community clinic in San Jose (CA) working with an underserved population and continued sharpening his clinical skills while working with a similar population for a few years after residency. The intricacies of insurance plans and coverages were at times difficult to decipher, however, Akbar welcomed the challenge and was driven in figuring out how to steer through these obstacles. This is a testament to his hard work and perseverance in making sure his patients receive the services they deserve.


Akbar has always enjoyed the diversity in the south bay area and has embraced it having found many lessons to be learned from the various cultures. Part of the reason behind this is due to his interest in learning languages and having grown up in an eastern culture himself; he speaks Farsi and Spanish in addition to English. He also finds having insight into a patient’s culture will ultimately help lead to clinical decision making that is most appropriate for that particular patient. Having trained at an osteopathic program for medical school, the holistic philosophy of medicine and strong understanding of the musculoskeletal system is engrained in him.


Leslie Luff, BSN, RN

Practice Manager

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Leslie is an experienced Registered Nurse with over 20 years of health care delivery experience. She began her career at Stanford Hospital where she worked as a staff nurse, clinical nurse specialist, physician liaison, and PACU nurse. She later gained experience in several specialities including cardiology, orthopedic spine, gastroenterology, internal medicine, and ambulatory surgery. Leslie brings her love of serving and caring for others to her role as the practice manager, responsible for the day-to-day clinical management of the health center. She will help ensure your visit to the health center combines the highest quality of care with an exceptional experience.


Leslie is a California girl who was born in Malibu and raised in Menlo Park where she still resides today. She finds great satisfaction in working with people to help them reach their full potential. She is an active mom who enjoys baking, pilates, tennis, and is a huge football and baseball fan! She can often be found helping with her daughter’s crew team or trying to keep up with her son on a dirt bike.



Lauren Parks, RN

Registered Nurse

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Lauren has a passion for primary care and has extensive experience working in a fast-paced pediatric practice in her hometown of Greenville, South Carolina. Lauren graduated valedictorian of her nursing school class in 2012. She has a BSN as well as a Bachelor of Science in Sociology from the College of Charleston. Believing that cultivating relationships with patients is a crucial aspect of health promotion, Lauren prides herself in creating a warm environment for all patients. She is a dedicated worker and is excited to bring her friendliness and energy to the interdisciplinary team at Crossover.


Lauren relocated to the Bay Area from South Carolina at the end of 2016 for her fiancé’s job. They enjoy exploring the area and spend many their weekends skiing, hiking, exploring the coast, and learning to surf. She even purchased a wetsuit—not something a Southern girl ever expects to buy! Lauren is also an avid reader and always appreciates book recommendations!



Jessica Felty, RN

Registered Nurse

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Jessica is an energetic worker and has a love for primary care. She has spent most of her nursing career working in a fast-paced pediatric practice and as an elementary school nurse. She also worked at a nationally top ranked hospital in St, Louis, MO as a Neuroscience PCU nurse. Jessica has almost 10 years of nursing experience and strives to form a relationship with every one of her patients and their families. She believes that forming an open, honest, and trusting relationship between her and her patients is the most crucial step in establishing a good base for excellent healthcare.


Jessica is from a small town in Southern Illinois and relocated to the Bay Area earlier this year for her husband’s job. She enjoys exploring everything California has to offer and plans on trying to get to all of the National Parks in California and surrounding states. She loves adventure and exploring anything and everything she can find. Jessica values quality time with her family and their hilarious dog, Diesel. She enjoys being able to expose her son to the diversity and the many different cultures that are found in the Bay Area.


Andrea Cerezo

Lead Host

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Andrea is ambitious and driven to put her best work forward as she enjoys working with people and is passionate about the health and wellness field. She graduated as a Dean’s Scholar from San Jose State University with a Bachelor of Science in Kinesiology. Andrea has over 7 years of experience in the health care field from working in a Nursing home and at a Physical Therapy clinic. She believes and values the importance of creating a positive patient experience for every member as they walk through the door.


Outside of work, Andrea enjoys spending her time outdoors and venturing out to find new places to eat. She loves to explore different hiking trails, enjoys going out for a run, and loves weekend trips to the beach.


Paul Estioko


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Paul is an amiable and adventurous individual with the personal goal to make at least one person smile a day. Meeting new people, delving into new experiences and places, and attempting to find comfort during uncomfortable situations are a few things he finds joy in. Ever since Paul was old enough to work, he began learning and fostering invaluable skills from working in varied industries – education, restaurant, fine arts, and rehabilitation to name a few.


Paul was born in the Philippines and immigrated to the United States in 1997 and is the youngest of six children. He attended college at San Jose State University where he was Cum Laude and received his Bachelor’s of Science in Health Science and also minored in Kinesiology. Outside of the clinic, He is also a “triple threat.” Paul is a professional performer who sings, acts, and dances for theatre, film, and private events around the Bay Area and abroad. Paul also is a Hula/Tahitian dancer, loves comic books, and believes stickers are too much commitment.


Christine Letrong


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Christine is a quirky and compassionate individual who loves connecting with people and is passionate about health and wellness.


Christine was born in Oklahoma but raised in the Bay Area. She attended San Jose State University where she received her Bachelor’s Degree in Health Services Administration. Christine began her career in health care working at a behavioral health clinic as a Clinical Assistant while she was in college. Once she received her degree, she moved on to work as a Referral Specialist for a large children’s hospital in Palo Alto. Christine also worked in the tech industry for a short while, only to realize that healthcare is where she truly belonged.


Outside of work, Christine spends a lot of time with her family and takes advantage of the weekends by going on short trips. Christine loves all dogs but loves her Maltese-Dachshund pup Phoebe, the most! Christine enjoys staying active by going to the gym and rewarding herself for being active by eating good food.



Jason Yuag, DPT

Physical Therapist

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Jason received his Doctorate in Physical Therapy from Samuel Merritt University in 2009. Since then he has been primarily focused on treating patients in an outpatient setting where he has treated a variety of orthopedic injuries; however, it is in sports-related injuries where Jason’s passion lies having treated athletes from the high school to the professional level.


Jason understands that every person is unique which is why he takes his time with each patient to customize a treatment plan to develop an individualized plan of care with specific goals achievable by each patient. Jason utilizes a very hands-on approach with his patients as well as using functional exercises and patient education to yield the best outcomes.


Jason continues his educational pursuit to ensure his patients receives the most up-to-date evidence based evaluation and treatments to provide the best care he can offer. He is also a Certified Ergonomic Assessment Specialist 1 (CEAS 1).


In his personal time, Jason likes to maintain his health and fitness by playing sports, spending time outdoors, weight lifting and training. He also loves spending time with his family and friends as much as possible while rooting for the Warriors and Niners.


Ryan Deubel, DC


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Ryan is a California board-certified chiropractor who is constantly motivated to expand his knowledge base in both personal endeavors and chiropractically. He has obtained, utilized and progressively developed a skill-set that includes wide-ranging adjusting techniques, Active Release Therapy (ART), Graston Technique, flexion-distraction, taping and rehabilitation in both sporting and non-sporting environments. Throughout his career he has utilized this knowledge base and skill-set across multiple west coast offices, a personally owned practice in Michigan, as well as multiple athletic events, including the Ironman World Championship in Hawai’i. With these skills he strives to provide the highest quality chiropractic care for prevention of injuries, quick and effective rehabilitation of existing injuries, and management of further disorders.


Ryan was born and raised in Lansing, Michigan as the youngest of four children. He participated in multiple sports throughout his youth, including high school and college wrestling. Undergraduate studies were completed at Grand Valley State University where he received a Bachelor’s degree in Health Science with honors. He then went on to complete his chiropractic studies at Palmer College of Chiropractic West where he received a Doctorate of Chiropractic with honors, as well as multiple awards that included Intern of the Year. When not in-office with patients, he enjoys exercise and outdoor adventures that include running, cycling, hiking and camping. He is also very motivated by creative endeavors in music, food and coffee.



Sahar Ghasemi, LAC


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Sahar is a Licensed Acupuncturist with a passion for integrating Eastern Medicine into the modern healthcare system. She earned her Master’s of Science in Traditional Chinese Medicine from Five Branches University in San Jose and her Bachelor’s in Global Environment, Health and Natural Resources from the University of California, Davis. In addition to her studies Sahar completed an intensive hospital internship at China Medical University in Taiwan where she had the valuable opportunity to observe the integration of Traditional Chinese Medicine in a Western hospital setting. 


Sahar specializes in a broad range of conditions including pain, athletic injuries, stress, depression, and women’s health. She strives to create individualized treatment plans focusing on bringing balance to the body, mind, and spirit in order to address the root cause of her patients health concerns. She strongly believes in educating her patients about self care and providing them with tools to continue their healing outside of the clinic. 


Born and raised in California, Sahar enjoys the beautiful weather, nature, and diversity here. She values quality time with her family and friends. Outside the clinic she loves dancing, traveling the world, taking Persian poetry classes, soccer, and exploring the outdoors. 



Jennifer Gordon

Massage Therapist

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Born and raised in the south bay area Jennifer received her BA from Humboldt State University before deciding massage was the path she wanted to follow. Jennifer is a Nationally certified massage therapist and has been practicing massage for 20 years. In those years she has over 1000 hours of training as well as being trained as a Pilates instructor in the Polestar method.


Jennifer designs each session based on client goals and needs. Whether you completed your first Spartan race, need to de stress or just want to have the kinks worked out, Jennifer can provide a massage to help you reach your goals. Jennifer utilizes many techniques including deep tissue, cranial sacral, myofascial release and cupping. Jennifer believes that how we take care of ourselves today influences how we age.


Outside of work she spends time in the gym, playing with her three dogs and cooking meals from her garden.



Sonya Bruner, PsyD

Clinical Psychologist

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Sonya obtained her bachelors in psychology from St John Fisher in Rochester, NY, and later her M.S. and Doctorate in Psychology at Antioch University New England, in Keene, New Hampshire. Sonya completed her pre-doctoral internship year at Riverbend Community Health in Concord, NH, and post-doctoral residency at Genesis Behavioral Health in Laconia, NH, with a specialization in adolescents and families. Following her post-doctoral training, she entered private practice and expanded her clinical focus to include work with adults with a variety of presenting problems, including anxiety, depression, and trauma, in addition to relational and family issues. Sonya has a strong interest and background in applying principles of dialectical and cognitive-behavioral therapy in treatment, including teaching mindfulness strategies. In addition, she has an ongoing interest in working with clients on issues related to trauma survival and recovery, and phase of life stress and resilient identity transformation.


Sonya was born and raised on the East Coast, but relocated to California in 2016. She enjoys spending time exercising, doing outdoor activities, reading, and spending time with friends and family.



Brittany Murray, MPH

Health Coach

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Heather seeks to improve the health of the community by coaching others how to adopt easy, sustainable, and optimal lifestyle habits. She loves food in all of its many iterations, starting from seeds and soil, to what ends on our plates. As a college student-athlete, she learned firsthand the importance of nutrition for cognitive and physical performance, and through her years of international travel, Heather came to embrace food as the thread that connects the world. Heather joins our team with a deep love of learning, utmost respect for different cultures, and a nose for good food.


Heather was born in San Francisco and spent her childhood on California’s central coast. She studied at Cal Poly University in San Luis Obispo, earned her Master’s at San Jose State University, and has spent the past decade at UCSF and Stanford Health Care as a dietitian. Heather’s ideal day would be spent riding bikes with her husband and kids to the local farmers market, trail running with her dog, and having family and friends over for dinner and drinks.



Anastasia Alvarez

Brand Coordinator

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Anastasia has a gift for relationship building which she has honed in a variety of clinical settings over her working experience. In her role as host, Anastasia is the first person to greet you and help you feel welcome as you begin the care experience. She also helps with any patient service issues, including coordinate appropriate follow up. She was fortunate to work and gain experience while in various medical clinics ranging from a surgery office to a physical therapy clinic. Anastasia is a San Francisco native and a graduate of St. Mary’s College of California.


Anastasia loves San Francisco and continues to enjoy exploring and finding hidden gems the the city has to offer. She has a goal to visit every stadium in the NFL and MLB. She has a passion for sports, including both the Giants and 49ers. She previously served as a 49ers Fan ambassador where she provided game day customer service for 5 seasons. When not working she enjoys traveling and hanging with friends and family.

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