Dr S. Reed Shimamoto grew up in Montana and Colorado. He obtained his medical degree from the University of Colorado Health Sciences Center, in Denver, CO. He completed his Pediatric Residency at St. Joseph’s Hospital and Medical Center in Phoenix, AZ from 1997 to 2000 and served as Chief Resident 2000-2001. he then completed his Allergy & Immunology fellowship at National Jewish Health Center and University of Colorado School of Medicine in Denver from 2001 to 2003, Colorado where he was Chief Fellow and a member of the Medical Staff between 2002-2003. Dr. Shimamoto founded San Tan Allergy & Asthma in 2005, and has been featured in Phoenix Magazine’s “Top Docs” issues. He is currently a member of the American College of Allergy and Immunology, the American Academy of Allergy, Asthma and Immunology, The American Academy of Pediatrics and is Board Certified in Allergy & Immunology and Pediatrics. Dr. Shimamoto has lectured on asthma, allergies, anaphylaxis, food allergy and eosinophilic diseases at local and national programs. He is currently accepting new pediatric and adult patients. Dr. Shimamoto lives in Gilbert with his wife and daughters and enjoys responsible marine fish/reef keeping, gardening, swimming and cooking.
David J. Reeder
Dr. David J. Reeder was born and raised in Mesa, Arizona. He obtained his medical degree from University of Arizona College of Medicine- Phoenix. He completed his training in internal medicine at Mount Auburn Hospital, then a teaching hospital of Harvard Medical School located in Cambridge, MA. Dr. Reeder completed his fellowship in allergy and clinical immunology at the University of California- Irvine in 2020. He is a diplomat of the American Board of Allergy and Immunology, qualified to treat both pediatric and adult patients. He is a member of the American Academy of Allergy, Asthma, and Immunology, where he actively contributes to national committee proceedings. He is also a member of the American College of Allergy and Immunology. Dr. Reeder is currently accepting new pediatric and adult patients. He lives in Gilbert with his wife and four children. In his spare time, he enjoys obscure references to Star Wars, playing Nintendo Switch with his children, and the cherished tradition of disagreeing with referees during Phoenix Suns games.
Carly Hopkins was born and raised in Mesa, Arizona. She graduated Cum Laude from Arizona State University where she received a Bachelor of Science in Psychology in 2009. Prior to attending PA school, she worked in inpatient and outpatient radiology settings. She also spent a month in Tanzania, Africa on a medical mission to serve pediatric patients in that region. She then attended PA school at AT Still University and graduated with distinction in 2013. During PA school she was involved in several community outreach and volunteer events providing medical care to those who didn’t otherwise have access to it. After graduating PA school, she spent 4 years practicing Internal Medicine in Chandler AZ. In 2017 she decided to expand her career in the field of Asthma, Allergy and Immunology and joined our team at San Tan Allergy and Asthma. Carly is a nationally board-certified physician assistant, a member of the American Academy of Physician Assistants as well as the Arizona State Association of Physician Assistants. She currently also has memberships with the Arizona Allergy and Asthma Society and the American Academy of Physician Assistants in Allergy, Asthma and Immunology. Carly is married and has two young children (a daughter and a son). She enjoys spending time with family, camping, playing volleyball and traveling.
Kerry Berghoff, our nurse practitioner, has been working in allergy for almost twenty years. She started out her professional life as a biologist, however, and it took her a few years before she went back to school for her nursing degree. It took ten more years before she would become a nurse practitioner, but she would continue her work in allergy during this time. Patient education is one of her passions as is getting to know patients and their families as they deal with their allergies (and asthma and eczema), improving their health along the way.
Outside of work, Kerry likes to spend time with her husband of 25 years and their six (yes 6) Cavalier King Spaniels. She likes to cook, read, craft, and listen to both music and audiobooks.
Corey Seguine grew up in Alaska and Washington State. He graduated Cum Laude from Arizona State University with a Bachelor of Science in Biological Sciences. He completed PA training through Northern Arizona University graduating in 2016. He is a nationally board certified physician assistant and a member of the American Academy of Physician Assistants and Arizona State Association of Physician Assistants. Throughout his educational journey, Corey participated in numerous community volunteer programs, worked in long term care facilities providing care for those in need, and helped others on their PA journeys through various clubs and organizations. He previously practiced Family medicine in Gilbert for 6 years before pursuing a wider scope into Asthma, allergy, immunology. Corey enjoys spending time with his wife and twin boys, sports, reading, traveling, and cooking.
Meet Our Staff
LPN, Practice Administrator
Sweney has been a Licensed Practical Nurse since 2013 and has worked in allergy from the start of her career. She has worked for SanTan Allergy & Asthma since 2015, and initially worked in the back office with most of the providers, and most recently has been given the opportunity to be the practice administrator. She has always been passionate about the medical field and the passion she has had for nursing has only grown since working in the field and she finds it extremely rewarding to provide help and compassion to people that she sees day to day. Sweney was born in California but raised in Arizona most of her life. In her free time, she enjoys spending time with her son, along with traveling when she can. In addition to this, she is very family oriented and loves to hang out with her friends.
LPN, Clinical Manager
Compassionate and dedicated Licensed Practical Nurse with over five years of experience in healthcare.
Certified Medical Assistant
Jade is Dr. Shimamoto’s Medical Assistant. She is originally from Hillsboro, Oregon but has been living in Mesa, Arizona for about 6 years now. She graduated from her medical assisting program top of her class in 2018 with a 4.0 GPA, then became an AAMA Certified Medical Assistant in 2019, she is also now working towards my BSN-RN degree. In her free time, she enjoys spending time with her daughter who keeps her more than busy and is a fun ball of energy. Growing up she took care of her grandmother who had cancer; therefore, she always knew she wanted to be in the medical field. She loves meeting new patients and getting the chance to hear their story, She always looks forward to growing and delivering the best care she can to her patients.
Registered Medical Assistant
Catherine, RMA is the medical assistant for our Nurse Practitioner, Kerry Berghoff. Catherine has been caring for patients as an RMA in Arizona since 2003. Catherine has worked several years in pediatrics and family practice and has been with San Tan Allergy & Asthma since 2018. She enjoys assisting the patients in our community and prides herself in making every patient feel valued and cared for. Catherine always wants the patient to leave the office having a great experience.
In her free time, Catherine enjoys spending time with her husband and two children, as well as their two dogs. She also enjoys the outdoors, she has a side business as a portrait photographer, and enjoys roller-skating every chance she gets!
Registered Medical Assistant
Marisa Sells is our Serum Manager. She has been with San Tan Allergy & Asthma for 14 years and it gives her joy to know that she contributes to our patient’s allergy/asthma treatment plans. She absolutely loves and enjoys her job. In her free time, she enjoys working with all the wonderful providers and her teammates. She is an Arizona native, and she loves traveling, hiking, reading, yoga, and spending time with her family.
Registered Medical Assistant
Kathy is a registered medical assistant. She has 12 years experience as an RMA and she has been working at San Tan Allergy & Asthma for almost 7 years. She always try’s to treat patients the way she would want herself or her family treated. She enjoys being a part of San Tan Allergy & Asthma.
Registered Medical Assistant
Angela is a Registered Medical Assistant with over 30 years experience. She currently works in the shot department and has been with San Tan Allergy and Asthma for over 10 years. She enjoys being in the kitchen and entertaining family and friends. Her two sons and granddaughter are her true joy.
Lynn is Dr. Shimamoto’s Medical Assistant. She is a true Chicago girl but is happy to be here in Arizona and enjoying the summer sun. She is a driven individual who has found a passion in working with patients. This led her to further develop her skills through an Associates in Science and RMA certification. From direct patient interactions to managing office work she finds fulfillment and value in knowing that she is positively impacting patients. Outside of work she enjoys exploring the world with her mini me, Miliano, her 6-year-old son. Who gives her energy in life, capability to love others, and always enjoy the journey that is next to come. She is happy and hopeful that she can bring a part of her positivity to help you here at San Tan Allergy & Asthma.
Vanessa “Vee” is a medical assistant who started out in the shot department about 2 years ago. Just recently she has become the Biologic Coordinator for STAA. While she has been in the medical field for nearly 20 years she has worked in many different areas starting in family medicine to urgent care and working at a county hospital back in Texas before moving to Arizona in 2015. Vanessa is passionate about her role at STAA because she is making a difference in helping patients feel better. Her daily goal is to make people laugh and smile.
Brooke is a Medical Assistant at San Tan Allergy and Asthma. She graduated from Gilbert high school and her medical assisting program in 2022. She is passionate in patient care, and strives to make every patient smile. She loves traveling, drawing, and spending time with her family and friends.
I am a first year medical assistant with SanTan Allergy being my first place of employment fresh out of school. I am 20 years old and love to play and watch sports, be outdoors, and hangout with friends and family. I have lived in Arizona my whole life and actually struggle with asthma myself. I feel like having asthma myself allows me to be able to connect with the patients I’m interacting with as I know how hard life can be. I have really come to enjoy all of the things medical assistants do such as caring for patients and helping them do the things they love to do so everybody can be happy. In the future, I am going back to school to become a CST (Certified Surgical Technician). I am always looking to learn new things and expand my knowledge to not only the allergy and asthma side of the field but everything in between. I am willing to help when and where I am needed no matter what lies ahead.
Kassandra was born in Arizona but lived in New Mexico until recently. She loves to travel, go on adventures and is a very energetic bilingual social butterfly.
Ashlyn is a Hamilton High School graduate who spent her younger years living in North Dakota, until moving back to Arizona to be with family. During her spare time she loves to draw and spend time with loved ones, as well as her four cats.
Savannah has been working for San Tan Allergy and Asthma since July of 2022. She graduated Summa Cum Laud from ASU with a Bachelors in Human and Family Development in Spring of 2021 and plans to pursue a career helping children and their families. She loves being outdoors when she can and spending time with her husband and their dog, Bentley.
Shon was born in Arizona but raised in California. She has spent over 12 years in the Healthcare field. Her hobbies include reading, baking, crafting, and any outdoor activity but she mostly enjoys spending time with her family.
Visit us at any of
4915 E. Baseline Road, Suite 112
Gilbert, AZ 85234-2966
Welcome to San Tan Allergy & Asthma and thank you for choosing our practice! Please provide your contact information here to schedule a New patient appointment at one of our locations and one of our front office staff members will call you within the next business day to assist you. We look forward to treating you and hope we can help you!