Providing you with the best providers for the best care

  • Dr. Joshua Oaks


    Dr. Joshua Oaks was born in Salt Lake City and grew up in Provo, Utah.  He is a graduate of Brigham Young University with a degree in Business Management. He obtained his medical degree from Saint George’s University where he graduated Cum Laude. He subsequently did an Internal Medicine residency at Overlook Medical Center in Summit, New Jersey.  


    Dr. Oaks enjoys spending time with his wife and 3 children.  Dr. Oaks joined the practice in July 2018.

    Accepting New Patients

  • Dr. Jeffery Oka


    Dr. Jeffery R. Oka was born and raised in Ogden, Utah.  He obtained his Bachelor of Arts degree in Chemistry from Weber State University, and his medical degree from the University of Utah.  He completed his residency in Physical Medicine and Rehabilitation from the University of Utah Medical Center.  Dr. Oka has practiced as a physiatrist for over 25 years mostly in the Bountiful area. 

    In his spare time, he loves to spend time with his wife and children.  He loves gourmet cooking, tending to his yard, and fishing.  He was an avid skier in his younger days.

    Speaks English and Japanese.

    Accepting New Patients

  • Dr. Celine Rivera


    Dr. Celine Rivera is a board certified physician in Internal Medicine and Obesity Medicine with special interests in preventative medicine and wellness.  She earned her Bachelor's degree from the University of Michigan, Masters degree from Wayne State and her Medical degree from Ross University.  Upon graduation she completed her internal medicine residency at Henry Ford Hospital in Detroit, Michigan.

    In her spare time, Dr. Rivera enjoys spending time with her husband, two children and 3 Boston terrier dogs.  She also enjoys skiing, traveling and loves to cook for her family.

    Accepting New Patients

  • Dr. Nathan Phelps


    Dr. Phelps is board certified in family medicine. He graduated from Brigham Young University with a degree in Latin American Studies. He then went on to get a Master's in Biomedical Sciences and his medical degree from Chicago Medical School. He finished his internship and residency at Saint Joseph's Regional Medical Center in Indiana in 2014. After residency he and his family moved back to Utah where he joined A practice in Ogden where he practiced for 3 years. During the past couple years he has focused on hospice and nursing home care. He is excited to join Bountiful Internal Medicine to get back in the clinic setting. 


    Dr. Phelps has always looked at the whole person and tries to treat the person and not just a disease state or condition. He is committed to forming strong relationships and providing the best care possible. 


    His interests are nutrition, cooking, hiking, being outdoors. He has 6 children and spends much of his free time helping them pursue their interests. 

    Accepting New Patients

  • Dr. Lisani Estopinan


    Dr. Lisani Estopinan is a board certified physician in Internal and Hospital Medicine. Dr. Estopinan speaks English and Spanish and was born in Venezuela. She obtained her medical degree from the University of Carabobo-School of Medicine in 


    Venezuela and her Internal Medicine Degree from Saint Peter's University Hospital associated with Drexel University College of Medicine in New Jersey. Prior to joining the Hospitalist Group at Lakeview Hospital in May 2018, Dr. Estopinan worked as a Hospitalist in Nevada. 


    In her spare time, Dr. Estopinan enjoys spending time with her husband and two daughters and skiing, riding her bicycle, and hiking. She has been living in Bountiful, Utah since 2018.

    Accepting New Patients

  • Melanie Oliver


    Melanie Oliver is a Gerontological Nurse Practitioner and is nationally certified by the American Nurses Credentialing Center (ANCC). She began her career working as a Certified Nursing Assistant working in nursing homes and assisted living facilities. Melanie received her Bachelor of Science in Nursing from Weber State University, graduating Cum Laude in 2003.  After working several years in a hospital setting, Melanie went on to earn her Master of Science in Nursing from the University of Utah in 2006. Melanie focused her graduate education on the geriatric and adult population and earned her Graduate Certificate in Gerontology.


    Melanie specializes in Internal Medicine treating diabetes, hypertension, hyperlipidemia and other conditions. Melanie not only focuses on preventative care but enjoys working with her patients to develop a plan for treating chronic disease processes.


    Melanie is married with four children and takes joy in spending time with them and their many activities. She enjoys camping, hiking, frisbee and spending time outdoors.

    Accepting New Patients

  • Rachel Smith


    Rachel Smith is a board-certified nurse practitioner. She received her master's degree as a family nurse practitioner from the University of South Alabama in 2014 and completed her Bachelor of Science in Nursing from the University of South Alabama in 2012. She earned her Associates of Science in Nursing from Weber State University in 2008. Rachel worked as a nurse for five years in the post-anesthesia care unit, new-born intensive care unit, and cardiology. Before her career as a nurse she worked for ten years as a Registered Dental Hygienist in Layton, UT. 

    After graduating as a nurse practitioner, Rachel moved to the Four Corners area where she practiced in a busy rural Urgent Care clinic. Rachel has recently moved back home to Davis County Utah where she was born and raised. She enjoys spending her free time reading and quilting, but her favorite activity is spending time with her husband and children. 

    Accepting New Patients

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    Dr. Grant Christian


    Dr. Christian has been practicing medicine for over 40 years and possesses a vast knowledge of the human body and how it ages.   Dr. Christian is up to date on treatments for moderate to severe medical disorders and is a respected internal medicine physician. Throughout his tenure, he has worked to improve the health and well-being of his patients.  He serves on the Davis Applied Technology College (DATC) foundation board and is a Home Health and Hospice Medical Director.  He cares deeply about his patients and always aims to do the very best for them.

    Dr. Christian enjoys camping and backpacking in the Tetons and being with his family.  Dr. Christian has five children and 13 grandchildren.

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    Dr. Scott Southworth


    Scott Southworth, MD received his doctorate degree in medicine from the University of Utah and completed his residency in internal medicine at the LDS Hospital. In his spare time, Dr. Southworth's interests include art, piano, writing, golf and basketball. He resides in Farmington with his family.

  • Dr. Val Hansen


    Dr. Val Hansen has been practicing Internal Medicine here in Bountiful for over 30 years!  Dr. Hansen is a Cache Valley native and finished his undergrad degree at Utah State University.  Dr. Hansen went to The University of Utah for Medical School as well as completed his Internal Medicine residency with them.  


    Dr Hansen enjoys hiking, skiing, traveling and visiting with his children and grandchildren.  Dr. Hansen is married with 4 kids and 2 dogs.

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520 Medical Drive, Suite 300, Bountiful, UT 84010