Our Team
Our Team
Our Team
Meet the asthma & allergy specialists
Meet the asthma & allergy specialists
Our specialists bring decades of combined experience to provide the highest standard of care.
What makes our team stand out
Licensed experts
Our team is certified, experienced, and trained in their specialized field to ensure safe
Licensed experts
Our team is certified, experienced, and trained in their specialized field to ensure safe
Licensed experts
Our team is certified, experienced, and trained in their specialized field to ensure safe
Licensed experts
Our team is certified, experienced, and trained in their specialized field to ensure safe
Compassionate care
We lead with empathy, listen closely, and treat every patient like family with kindness and respect
Compassionate care
We lead with empathy, listen closely, and treat every patient like family with kindness and respect
Compassionate care
We lead with empathy, listen closely, and treat every patient like family with kindness and respect
Compassionate care
We lead with empathy, listen closely, and treat every patient like family with kindness and respect
Clear communication
Our team explain everys step with patience, clarity, and simple language that builds patient trust
Clear communication
Our team explain everys step with patience, clarity, and simple language that builds patient trust
Clear communication
Our team explain everys step with patience, clarity, and simple language that builds patient trust
Clear communication
Our team explain everys step with patience, clarity, and simple language that builds patient trust
Marcy D. Markes, MSN, APRN, FNP-BC, AE-C
American College of Allergy Asthma Immunology-Member
Association of Asthma Educators-Member
Missouri Nurses Association-Member
American Nurses Association-Member
Missouri Coalition of Nurses in Advanced Practice-Member
I grew up in Marshall, Missouri and attended the University of Missouri-Columbia Sinclair School of Nursing for both my undergraduate and graduate degrees. I have been involved in allergy and asthma diagnosis, treatment and research since 2000 and am a Certified Asthma Educators in Columbia, MO. I am married to Ron and have a daughter, son and grandson. I enjoy ALL dogs and love spending time near any body of water, but prefer the ocean.
Marcy D. Markes, MSN, APRN, FNP-BC, AE-C
I grew up in Marshall, Missouri and attended the University of Missouri-Columbia Sinclair School of Nursing for both my undergraduate and graduate degrees. I have been involved in allergy and asthma diagnosis, treatment and research since 2000 and am a Certified Asthma Educators in Columbia, MO. I am married to Ron and have a daughter, son and grandson. I enjoy ALL dogs and love spending time near any body of water, but prefer the ocean.
American College of Allergy Asthma Immunology-Member
Association of Asthma Educators-Member
Missouri Nurses Association-Member
American Nurses Association-Member
Missouri Coalition of Nurses in Advanced Practice-Member
Marcy D. Markes, MSN, APRN, FNP-BC, AE-C
I grew up in Marshall, Missouri and attended the University of Missouri-Columbia Sinclair School of Nursing for both my undergraduate and graduate degrees. I have been involved in allergy and asthma diagnosis, treatment and research since 2000 and am a Certified Asthma Educators in Columbia, MO. I am married to Ron and have a daughter, son and grandson. I enjoy ALL dogs and love spending time near any body of water, but prefer the ocean.
American College of Allergy Asthma Immunology-Member
Association of Asthma Educators-Member
Missouri Nurses Association-Member
American Nurses Association-Member
Missouri Coalition of Nurses in Advanced Practice-Member
Dr. Mohammad Jarbou
Board Certified in Pulmonary Medicine
Board Certified in Critical Care Medicine
Board Certified in Internal Medicine
Board Certified in Sleep Medicine
Dr. Mohammad Jarbou is a board-certified physician with specialized expertise in pulmonary medicine, internal medicine, critical care, sleep medicine, and clinical informatics. With over 20 years of experience in diagnosing and treating a wide range of respiratory and critical care conditions, Dr. Jarbou has developed a reputation for providing exceptional patient care and leveraging the latest advances in medical science.
Dr. Mohammad Jarbou
Dr. Mohammad Jarbou is a board-certified physician with specialized expertise in pulmonary medicine, internal medicine, critical care, sleep medicine, and clinical informatics. With over 20 years of experience in diagnosing and treating a wide range of respiratory and critical care conditions, Dr. Jarbou has developed a reputation for providing exceptional patient care and leveraging the latest advances in medical science.
Board Certified in Pulmonary Medicine
Board Certified in Critical Care Medicine
Board Certified in Internal Medicine
Board Certified in Sleep Medicine
Dr. Mohammad Jarbou
Dr. Mohammad Jarbou is a board-certified physician with specialized expertise in pulmonary medicine, internal medicine, critical care, sleep medicine, and clinical informatics. With over 20 years of experience in diagnosing and treating a wide range of respiratory and critical care conditions, Dr. Jarbou has developed a reputation for providing exceptional patient care and leveraging the latest advances in medical science.
Board Certified in Pulmonary Medicine
Board Certified in Critical Care Medicine
Board Certified in Internal Medicine
Board Certified in Sleep Medicine
Ashley Burr, MSN, APRN, FNP-C
I am a Columbia, Missouri native with a passion for healthcare and community. As a nurse practitioner specializing in neurosurgery for the past four years, I bring eight years of experience as a nurse practitioner and have been a registered nurse since 2013. I earned my bachelor’s degree from Missouri Valley College and my master’s degree from Maryville University. My approach to care emphasizes prevention and building meaningful connections with my patients to support their well-being.I am happily married and a proud parent to three young children, Kinley, Holden, and Landry. Our family also includes a beloved dog. Outside of work, I cherish spending time with family and friends, hunting, and embracing the joys of the outdoors.
Ashley Burr, MSN, APRN, FNP-C
I am a Columbia, Missouri native with a passion for healthcare and community. As a nurse practitioner specializing in neurosurgery for the past four years, I bring eight years of experience as a nurse practitioner and have been a registered nurse since 2013. I earned my bachelor’s degree from Missouri Valley College and my master’s degree from Maryville University. My approach to care emphasizes prevention and building meaningful connections with my patients to support their well-being.I am happily married and a proud parent to three young children, Kinley, Holden, and Landry. Our family also includes a beloved dog. Outside of work, I cherish spending time with family and friends, hunting, and embracing the joys of the outdoors.
Ashley Burr, MSN, APRN, FNP-C
I am a Columbia, Missouri native with a passion for healthcare and community. As a nurse practitioner specializing in neurosurgery for the past four years, I bring eight years of experience as a nurse practitioner and have been a registered nurse since 2013. I earned my bachelor’s degree from Missouri Valley College and my master’s degree from Maryville University. My approach to care emphasizes prevention and building meaningful connections with my patients to support their well-being.I am happily married and a proud parent to three young children, Kinley, Holden, and Landry. Our family also includes a beloved dog. Outside of work, I cherish spending time with family and friends, hunting, and embracing the joys of the outdoors.
Candice McCool, MSN, APRN, AGACNP-BC
Candice McCool, MSN, AGACNP-BC is a board-certified, Acute Care Nurse Practitioner, dedicated to providing comprehensive medical care to adult and geriatric patients. Candice has nearly 20 years of experience in healthcare, including inpatient care, critical care, and cardiology. With a Master of Science in Nursing from University of Southern Indiana, her focus is acute care, chronic disease management, and fostering strong relationships with her patients to understand their health needs and goals, and ensure the patient is at the center of decision–making. She’s passionate about providing high-quality, patient-centered care and is dedicated to staying up-to-date on the latest advancements in healthcare. Outside of the clinic, Candice enjoys spending time with her family, outdoor adventures, playing guitar, gardening, and reading.
Candice McCool, MSN, APRN, AGACNP-BC
Candice McCool, MSN, AGACNP-BC is a board-certified, Acute Care Nurse Practitioner, dedicated to providing comprehensive medical care to adult and geriatric patients. Candice has nearly 20 years of experience in healthcare, including inpatient care, critical care, and cardiology. With a Master of Science in Nursing from University of Southern Indiana, her focus is acute care, chronic disease management, and fostering strong relationships with her patients to understand their health needs and goals, and ensure the patient is at the center of decision–making. She’s passionate about providing high-quality, patient-centered care and is dedicated to staying up-to-date on the latest advancements in healthcare. Outside of the clinic, Candice enjoys spending time with her family, outdoor adventures, playing guitar, gardening, and reading.
Candice McCool, MSN, APRN, AGACNP-BC
Candice McCool, MSN, AGACNP-BC is a board-certified, Acute Care Nurse Practitioner, dedicated to providing comprehensive medical care to adult and geriatric patients. Candice has nearly 20 years of experience in healthcare, including inpatient care, critical care, and cardiology. With a Master of Science in Nursing from University of Southern Indiana, her focus is acute care, chronic disease management, and fostering strong relationships with her patients to understand their health needs and goals, and ensure the patient is at the center of decision–making. She’s passionate about providing high-quality, patient-centered care and is dedicated to staying up-to-date on the latest advancements in healthcare. Outside of the clinic, Candice enjoys spending time with her family, outdoor adventures, playing guitar, gardening, and reading.
Dee Meyer, Office Manager
Born a St Louis Cardinals fan in Florrisant, MO. In 2012, I moved from Florrisant to Columbia to start my working career. I attended Rosary High School in St Louis, MO and Missouri Baptist University in Creve Coeur, MO. My husband & I have 2 small children, Grayson & Crews and I have 3 step children Drew, Kale & Colten. Needless to say, we have cornered the market on raising boys!! My work experience primarily has been in the Sleep Apnea area, working with patients directly and managing front desk personnel. Making the transition to Asthma & Allergy is exciting for me as I will still interact with patients and care for their needs, which is what makes me happy. My goal is to help patients feel at ease when visiting the office & hopefully put a smile on their face at the same time. In my spare time, I play as much Volleyball as possible. I also like attending Country Music Concerts, hanging out with my boys & keeping up on the latest Bachelorette happenings.
Dee Meyer, Office Manager
Born a St Louis Cardinals fan in Florrisant, MO. In 2012, I moved from Florrisant to Columbia to start my working career. I attended Rosary High School in St Louis, MO and Missouri Baptist University in Creve Coeur, MO. My husband & I have 2 small children, Grayson & Crews and I have 3 step children Drew, Kale & Colten. Needless to say, we have cornered the market on raising boys!! My work experience primarily has been in the Sleep Apnea area, working with patients directly and managing front desk personnel. Making the transition to Asthma & Allergy is exciting for me as I will still interact with patients and care for their needs, which is what makes me happy. My goal is to help patients feel at ease when visiting the office & hopefully put a smile on their face at the same time. In my spare time, I play as much Volleyball as possible. I also like attending Country Music Concerts, hanging out with my boys & keeping up on the latest Bachelorette happenings.
Dee Meyer, Office Manager
Born a St Louis Cardinals fan in Florrisant, MO. In 2012, I moved from Florrisant to Columbia to start my working career. I attended Rosary High School in St Louis, MO and Missouri Baptist University in Creve Coeur, MO. My husband & I have 2 small children, Grayson & Crews and I have 3 step children Drew, Kale & Colten. Needless to say, we have cornered the market on raising boys!! My work experience primarily has been in the Sleep Apnea area, working with patients directly and managing front desk personnel. Making the transition to Asthma & Allergy is exciting for me as I will still interact with patients and care for their needs, which is what makes me happy. My goal is to help patients feel at ease when visiting the office & hopefully put a smile on their face at the same time. In my spare time, I play as much Volleyball as possible. I also like attending Country Music Concerts, hanging out with my boys & keeping up on the latest Bachelorette happenings.
Tammy Embark, Receptionist
I am from New York and have been in Missouri since 2020. I am married to Rick and we have 3 children and 2 grandchildren. I have worked here at Columbia Allergy and Asthma since 2022. I enjoy being outside, CHRISTMAS is my favorite Holiday and spending time with my family means everything to me! Before coming to Missouri, I worked in Long Term Care for 34yrs and loved taking care of others. The best part of my job is I get to help patients with their needs and develop amazing relationships with so many people. Here at Columbia Allergy and Asthma we treat each Patient with the respect they deserve and give the best quality of care. We have an amazing team.
Tammy Embark, Receptionist
I am from New York and have been in Missouri since 2020. I am married to Rick and we have 3 children and 2 grandchildren. I have worked here at Columbia Allergy and Asthma since 2022. I enjoy being outside, CHRISTMAS is my favorite Holiday and spending time with my family means everything to me! Before coming to Missouri, I worked in Long Term Care for 34yrs and loved taking care of others. The best part of my job is I get to help patients with their needs and develop amazing relationships with so many people. Here at Columbia Allergy and Asthma we treat each Patient with the respect they deserve and give the best quality of care. We have an amazing team.
Tammy Embark, Receptionist
I am from New York and have been in Missouri since 2020. I am married to Rick and we have 3 children and 2 grandchildren. I have worked here at Columbia Allergy and Asthma since 2022. I enjoy being outside, CHRISTMAS is my favorite Holiday and spending time with my family means everything to me! Before coming to Missouri, I worked in Long Term Care for 34yrs and loved taking care of others. The best part of my job is I get to help patients with their needs and develop amazing relationships with so many people. Here at Columbia Allergy and Asthma we treat each Patient with the respect they deserve and give the best quality of care. We have an amazing team.
Michelle Gortmaker, RN
I grew up in a small town in South Dakota. I graduated from Augustana College in 1994 with a Bachelors of Art in Nursing. I have worked as an RN in the pediatric unit in the past. I am married to Mark and have 4 children and 2 dogs. We moved to Columbia in 2004. Fun facts about me would be that I love baking, doing crafts and playing golf.”
Michelle Gortmaker, RN
I grew up in a small town in South Dakota. I graduated from Augustana College in 1994 with a Bachelors of Art in Nursing. I have worked as an RN in the pediatric unit in the past. I am married to Mark and have 4 children and 2 dogs. We moved to Columbia in 2004. Fun facts about me would be that I love baking, doing crafts and playing golf.”
Michelle Gortmaker, RN
I grew up in a small town in South Dakota. I graduated from Augustana College in 1994 with a Bachelors of Art in Nursing. I have worked as an RN in the pediatric unit in the past. I am married to Mark and have 4 children and 2 dogs. We moved to Columbia in 2004. Fun facts about me would be that I love baking, doing crafts and playing golf.”
Abby Gerrity, Medical Assistant
I grew up in Michigan and moved to Columbia in 2012 to attend the University of Missouri. I fell in love with Columbia and have been here ever since. I previously worked for the University at the Women’s and Children’s Hospital before finding my work family here at CAAS in 2019. My favorite part of working here is being able to develop relationships with the patients and the friendly banter we share during the weekly allergy shots. On the weekends, I enjoy spending time with my partner Matt, our 5-year-old son Oliver, and our cat Chief (go KC Chiefs!). We enjoy spending time outdoors. We are big campers, and frequent Cooper’s landing, Devil’s Icebox, local parks, and any local restaurant with a nice patio. I also love cooking, reading, and gardening in my free time. I look forward to meeting all the potential new patients and being a part of your quality allergy and asthma care!
Abby Gerrity, Medical Assistant
I grew up in Michigan and moved to Columbia in 2012 to attend the University of Missouri. I fell in love with Columbia and have been here ever since. I previously worked for the University at the Women’s and Children’s Hospital before finding my work family here at CAAS in 2019. My favorite part of working here is being able to develop relationships with the patients and the friendly banter we share during the weekly allergy shots. On the weekends, I enjoy spending time with my partner Matt, our 5-year-old son Oliver, and our cat Chief (go KC Chiefs!). We enjoy spending time outdoors. We are big campers, and frequent Cooper’s landing, Devil’s Icebox, local parks, and any local restaurant with a nice patio. I also love cooking, reading, and gardening in my free time. I look forward to meeting all the potential new patients and being a part of your quality allergy and asthma care!
Abby Gerrity, Medical Assistant
I grew up in Michigan and moved to Columbia in 2012 to attend the University of Missouri. I fell in love with Columbia and have been here ever since. I previously worked for the University at the Women’s and Children’s Hospital before finding my work family here at CAAS in 2019. My favorite part of working here is being able to develop relationships with the patients and the friendly banter we share during the weekly allergy shots. On the weekends, I enjoy spending time with my partner Matt, our 5-year-old son Oliver, and our cat Chief (go KC Chiefs!). We enjoy spending time outdoors. We are big campers, and frequent Cooper’s landing, Devil’s Icebox, local parks, and any local restaurant with a nice patio. I also love cooking, reading, and gardening in my free time. I look forward to meeting all the potential new patients and being a part of your quality allergy and asthma care!
Iyesatu Bush, RRT
Iyesatu is a Registered Respiratory Therapist with a Bachelor’s in Health Science from MU’s Respiratory Therapy Program. She is originally from Seattle but has called Columbia home since 2008. Before joining the team, she worked in the acute care setting. In her personal time, she enjoys spending time with her husband and 3 sons and participating in local community theater.
Iyesatu Bush, RRT
Iyesatu is a Registered Respiratory Therapist with a Bachelor’s in Health Science from MU’s Respiratory Therapy Program. She is originally from Seattle but has called Columbia home since 2008. Before joining the team, she worked in the acute care setting. In her personal time, she enjoys spending time with her husband and 3 sons and participating in local community theater.
Iyesatu Bush, RRT
Iyesatu is a Registered Respiratory Therapist with a Bachelor’s in Health Science from MU’s Respiratory Therapy Program. She is originally from Seattle but has called Columbia home since 2008. Before joining the team, she worked in the acute care setting. In her personal time, she enjoys spending time with her husband and 3 sons and participating in local community theater.
Contact Us
How to get in touch with us
Have a question? We're always here to help.
Contact Us
How to get in touch with us
Have a question? We're always here to help.
Book online
Click here to schedule an appointment
Call us
Phone: (573) 777-4700
Fax: 844-366-3221
Contact Us
How to get in touch with us
Have a question? We're always here to help.
Contact Us
How to get in touch with us
Have a question? We're always here to help.
Book online
Click here to schedule an appointment
Call us
Phone: (573) 777-4700
Fax: 844-366-3221