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Mark Menich, MD, is an experienced physician at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado. At the practice, he provides complete allergy and immunology consultations and management for patients of all ages. 

Dr. Menich earned his Bachelor of Arts in History and a doctoral degree from the University of Illinois in Chicago. He then completed his internal medicine residency and allergy and immunology fellowship at Walter Reed Army Medical Center in Washington, DC. 

Dr. Menich has board certifications from the American Board of Allergy and Immunology and the American Board of Internal Medicine. He is a fellow of the American Academy of Allergy, Asthma, and Immunology and the American College of Allergy, Asthma, and Immunology. Dr. Menich is also a member of the International Society of Travel Medicine and the Colorado Allergy and Asthma Society. 

At Denver Allergy & Asthma Associates, Dr. Menich offers various services to improve his patient's health and well-being. 

William “Bill” Newman, MD, is a general medicine and allergy and asthma specialist. He serves patients at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado. 

Dr. Newman grew up in Dayton, Ohio, where he lived and breathed Reds baseball. He received his undergraduate degree in biology from Yale University in New Haven, Connecticut. While there, he worked in the immunology lab at the medical school, a position that sparked his interest in the field. 

He obtained his medical degree from Case Western Reserve University in Cleveland, Ohio, on a U.S. Army scholarship. Dr. Newman completed his internal medicine residency at Fitzsimons Army Medical Center in Aurora, Colorado (now the University of Colorado Anschutz Medical Campus). 

Dr. Newman spent the next four years as a staff internist at the U.S. Army Hospital in Heidelberg, Germany. He left military service in 1997 and joined the staff of the University of Vermont in Burlington, where he was also an assistant professor of medicine, teaching medical students and residents. 

After three years in primary care internal medicine, he sought specialty training and rejoined the Army to do so. He completed his allergy/immunology fellowship at Walter Reed Army Medical Center in 2002 and, from there, returned to Germany to become Chief of Allergy at the US Army Hospital in Würzburg, where he also functioned as chief of medicine. 

He left Germany and the Army in 2005 to launch a solo allergy/immunology practice in Vermont and spent the next 11 years as an established allergist in the Burlington, Vermont, area. 

When his son graduated from high school, he and his wife decided to make a bold change and return to Colorado. He joined Denver Allergy & Asthma and Associates in July 2016.

When not at work, Dr. Newman loves the wilderness and the mountains, camping, hiking, canoeing, and fishing whenever he can find the time. He is married and has a grown son who lives in Salt Lake City.

Nicole Barberis, MD, FACAAI, is a board-certified physician at Denver Allergy & Asthma Associates in Boulder, Westminster, and Denver. She specializes in allergy and immunology care for adults and children.

Dr. Barberis did her undergraduate training at the University of Colorado in Boulder. After medical school, Dr. Barberis completed her residency in internal medicine at National Jewish Health/ St. Joseph Hospital in Denver. She completed her allergy and immunology fellowship at National Jewish Health/ University of Colorado in Denver.

Throughout her career, Dr. Barberis has been a strong leader and educator. She is active in the local medical community. Dr. Barberis is the President of the Colorado Allergy and Asthma Society. She has numerous publications, has participated in research and is a preceptor for medical students rotating through the clinic.

She is on the board of directors for the Aspen Allergy Conference and a member of the American Academy of Allergy, Asthma, and Immunology, the American College of Allergy, Asthma and Immunology, the Colorado Medical Society, and the Boulder County Medical Society.

Born and raised in Boulder, Dr. Barberis enjoys outdoor activities of all kinds and spending time with her family.

Dr. Barberis naturally connects with her patients, taking the time to listen and explain. Her demeanor and professionalism have earned her trust among her peers and patients. She is looking forward to helping you with your allergy needs. She is currently accepting new pediatric and adult patients. 

Mark Menich, MD, is an experienced physician at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado. At the practice, he provides complete allergy and immunology consultations and management for patients of all ages. 

Dr. Menich earned his Bachelor of Arts in History and a doctoral degree from the University of Illinois in Chicago. He then completed his internal medicine residency and allergy and immunology fellowship at Walter Reed Army Medical Center in Washington, DC. 

Dr. Menich has board certifications from the American Board of Allergy and Immunology and the American Board of Internal Medicine. He is a fellow of the American Academy of Allergy, Asthma, and Immunology and the American College of Allergy, Asthma, and Immunology. Dr. Menich is also a member of the International Society of Travel Medicine and the Colorado Allergy and Asthma Society. 

At Denver Allergy & Asthma Associates, Dr. Menich offers various services to improve his patient's health and well-being. 

William “Bill” Newman, MD, is a general medicine and allergy and asthma specialist. He serves patients at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado. 

Dr. Newman grew up in Dayton, Ohio, where he lived and breathed Reds baseball. He received his undergraduate degree in biology from Yale University in New Haven, Connecticut. While there, he worked in the immunology lab at the medical school, a position that sparked his interest in the field. 

He obtained his medical degree from Case Western Reserve University in Cleveland, Ohio, on a U.S. Army scholarship. Dr. Newman completed his internal medicine residency at Fitzsimons Army Medical Center in Aurora, Colorado (now the University of Colorado Anschutz Medical Campus). 

Dr. Newman spent the next four years as a staff internist at the U.S. Army Hospital in Heidelberg, Germany. He left military service in 1997 and joined the staff of the University of Vermont in Burlington, where he was also an assistant professor of medicine, teaching medical students and residents. 

After three years in primary care internal medicine, he sought specialty training and rejoined the Army to do so. He completed his allergy/immunology fellowship at Walter Reed Army Medical Center in 2002 and, from there, returned to Germany to become Chief of Allergy at the US Army Hospital in Würzburg, where he also functioned as chief of medicine. 

He left Germany and the Army in 2005 to launch a solo allergy/immunology practice in Vermont and spent the next 11 years as an established allergist in the Burlington, Vermont, area. 

When his son graduated from high school, he and his wife decided to make a bold change and return to Colorado. He joined Denver Allergy & Asthma and Associates in July 2016.

When not at work, Dr. Newman loves the wilderness and the mountains, camping, hiking, canoeing, and fishing whenever he can find the time. He is married and has a grown son who lives in Salt Lake City.

Jeffrey Rumbyrt, MD, has been with the Denver Allergy & Asthma Associates team since 1994 and has served as the President of the practice since 2000.  He sees patients in Westminster, Arvada, and Lakewood.

Dr. Rumbyrt grew up in Chicago, where his love of baseball (White Sox), Lou Malnati’s pizza, classic rock, and science was first kindled. He first became interested in medicine while in high school after visiting a genetics research lab at Argonne National Laboratory.

Dr. Rumbyrt obtained his Bachelor of Arts in biology at Washington University in St. Louis, Missouri. He then attended and graduated from medical school at Loyola University of Chicago. After medical school, he completed his residency in internal medicine at Loma Linda University in California. He also completed an allergy and clinical immunology fellowship at National Jewish Health in Denver, Colorado. 

In addition to clinic responsibilities, he has been associated with Western States Clinical Research in Wheat Ridge, Colorado and has served as a principal investigator for over 50 clinical studies.  He has authored or co-authored several peer reviewed papers and book chapters.  He has served on numerous advisory boards and frequently lectures on new therapies used in the treatment of various allergic and immunologic diseases.  He is also a Clinical Professor of Medicine at the University of Colorado Health Sciences Center.

Over the years, Dr. Rumbyrt has amassed a veritable storehouse of useless trivia.  He loves to speak in accents.  His favorite topics of discussion include baseball statistics, classic rock bands and their music, and his innate inability to figure out the latest problem with his 1966 Mustang.  His three adult children have demonstrated amazing patience with his quirks.

He has a special interest in treating chronic hives, asthma, immune deficiency, and hereditary angioedema.  He looks forward to working with new and existing Denver Allergy & Asthma Associates patients. 

Shikha Gupta, MD, is a board-certified pediatrician and allergy and immunology physician. She sees patients at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado.

Dr. Gupta attended St. Bonaventure University in Olean, New York, where she graduated magna cum laude with a Bachelor of Science in biology. She earned her medical degree from State University of New York (SUNY) Upstate Medical University in Syracuse.

Dr. Gupta completed her residency in pediatrics at the Children’s Hospital at Montefiore in the Bronx, New York, before moving to Colorado for her fellowship. She was a pediatric allergy and immunology fellow at National Jewish Health in Denver.

At Denver Allergy & Asthma Associates, Dr. Gupta strives to build lasting relationships with her patients and their families. She puts communication first, and offers comprehensive allergy and asthma care for children of all ages.

Dr. Gupta is a member of the American Academy of Allergy, Asthma and Immunology, the American College of Allergy, Asthma and Immunology, and the Colorado Allergy and Asthma Society.

Mark Menich, MD, is an experienced physician at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado. At the practice, he provides complete allergy and immunology consultations and management for patients of all ages. 

Dr. Menich earned his Bachelor of Arts in History and a doctoral degree from the University of Illinois in Chicago. He then completed his internal medicine residency and allergy and immunology fellowship at Walter Reed Army Medical Center in Washington, DC. 

Dr. Menich has board certifications from the American Board of Allergy and Immunology and the American Board of Internal Medicine. He is a fellow of the American Academy of Allergy, Asthma, and Immunology and the American College of Allergy, Asthma, and Immunology. Dr. Menich is also a member of the International Society of Travel Medicine and the Colorado Allergy and Asthma Society. 

At Denver Allergy & Asthma Associates, Dr. Menich offers various services to improve his patient's health and well-being. 

Jeffrey Rumbyrt, MD, has been with the Denver Allergy & Asthma Associates team since 1994 and has served as the President of the practice since 2000.  He sees patients in Westminster, Arvada, and Lakewood.

Dr. Rumbyrt grew up in Chicago, where his love of baseball (White Sox), Lou Malnati’s pizza, classic rock, and science was first kindled. He first became interested in medicine while in high school after visiting a genetics research lab at Argonne National Laboratory.

Dr. Rumbyrt obtained his Bachelor of Arts in biology at Washington University in St. Louis, Missouri. He then attended and graduated from medical school at Loyola University of Chicago. After medical school, he completed his residency in internal medicine at Loma Linda University in California. He also completed an allergy and clinical immunology fellowship at National Jewish Health in Denver, Colorado. 

In addition to clinic responsibilities, he has been associated with Western States Clinical Research in Wheat Ridge, Colorado and has served as a principal investigator for over 50 clinical studies.  He has authored or co-authored several peer reviewed papers and book chapters.  He has served on numerous advisory boards and frequently lectures on new therapies used in the treatment of various allergic and immunologic diseases.  He is also a Clinical Professor of Medicine at the University of Colorado Health Sciences Center.

Over the years, Dr. Rumbyrt has amassed a veritable storehouse of useless trivia.  He loves to speak in accents.  His favorite topics of discussion include baseball statistics, classic rock bands and their music, and his innate inability to figure out the latest problem with his 1966 Mustang.  His three adult children have demonstrated amazing patience with his quirks.

He has a special interest in treating chronic hives, asthma, immune deficiency, and hereditary angioedema.  He looks forward to working with new and existing Denver Allergy & Asthma Associates patients. 

Nicole Barberis, MD, FACAAI, is a board-certified physician at Denver Allergy & Asthma Associates in Boulder, Westminster, and Denver. She specializes in allergy and immunology care for adults and children.

Dr. Barberis did her undergraduate training at the University of Colorado in Boulder. After medical school, Dr. Barberis completed her residency in internal medicine at National Jewish Health/ St. Joseph Hospital in Denver. She completed her allergy and immunology fellowship at National Jewish Health/ University of Colorado in Denver.

Throughout her career, Dr. Barberis has been a strong leader and educator. She is active in the local medical community. Dr. Barberis is the President of the Colorado Allergy and Asthma Society. She has numerous publications, has participated in research and is a preceptor for medical students rotating through the clinic.

She is on the board of directors for the Aspen Allergy Conference and a member of the American Academy of Allergy, Asthma, and Immunology, the American College of Allergy, Asthma and Immunology, the Colorado Medical Society, and the Boulder County Medical Society.

Born and raised in Boulder, Dr. Barberis enjoys outdoor activities of all kinds and spending time with her family.

Dr. Barberis naturally connects with her patients, taking the time to listen and explain. Her demeanor and professionalism have earned her trust among her peers and patients. She is looking forward to helping you with your allergy needs. She is currently accepting new pediatric and adult patients. 

Shikha Gupta, MD, is a board-certified pediatrician and allergy and immunology physician. She sees patients at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado.

Dr. Gupta attended St. Bonaventure University in Olean, New York, where she graduated magna cum laude with a Bachelor of Science in biology. She earned her medical degree from State University of New York (SUNY) Upstate Medical University in Syracuse.

Dr. Gupta completed her residency in pediatrics at the Children’s Hospital at Montefiore in the Bronx, New York, before moving to Colorado for her fellowship. She was a pediatric allergy and immunology fellow at National Jewish Health in Denver.

At Denver Allergy & Asthma Associates, Dr. Gupta strives to build lasting relationships with her patients and their families. She puts communication first, and offers comprehensive allergy and asthma care for children of all ages.

Dr. Gupta is a member of the American Academy of Allergy, Asthma and Immunology, the American College of Allergy, Asthma and Immunology, and the Colorado Allergy and Asthma Society.

Kara Crosby, DO, is a board-certified pediatrician and allergy and immunology physician. She sees patients at Denver Allergy & Asthma Associates in Denver and Littleton.

Dr. Crosby attended Ohio University in Athens, Ohio, and graduated with a Bachelor of Science in biology. She earned her medical degree from the Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania.
Dr. Crosby completed her residency in pediatrics at Akron Children’s Hospital in Akron, Ohio, and her fellowship in allergy and immunology at the University of Buffalo in Buffalo, New York.
After her fellowship, Dr. Crosby moved to Colorado where has established herself as a competent and compassionate physician. She believes in treating the whole individual. She specializes in allergy testing and comprehensive treatment for adults and children of all ages at Denver Allergy & Asthma Associates.
Dr. Crosby is a member of the American Academy of Allergy, Asthma and Immunology, the American College of Allergy, Asthma and Immunology, and the Colorado Allergy and Asthma Society.

William “Bill” Newman, MD, is a general medicine and allergy and asthma specialist. He serves patients at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado. 

Dr. Newman grew up in Dayton, Ohio, where he lived and breathed Reds baseball. He received his undergraduate degree in biology from Yale University in New Haven, Connecticut. While there, he worked in the immunology lab at the medical school, a position that sparked his interest in the field. 

He obtained his medical degree from Case Western Reserve University in Cleveland, Ohio, on a U.S. Army scholarship. Dr. Newman completed his internal medicine residency at Fitzsimons Army Medical Center in Aurora, Colorado (now the University of Colorado Anschutz Medical Campus). 

Dr. Newman spent the next four years as a staff internist at the U.S. Army Hospital in Heidelberg, Germany. He left military service in 1997 and joined the staff of the University of Vermont in Burlington, where he was also an assistant professor of medicine, teaching medical students and residents. 

After three years in primary care internal medicine, he sought specialty training and rejoined the Army to do so. He completed his allergy/immunology fellowship at Walter Reed Army Medical Center in 2002 and, from there, returned to Germany to become Chief of Allergy at the US Army Hospital in Würzburg, where he also functioned as chief of medicine. 

He left Germany and the Army in 2005 to launch a solo allergy/immunology practice in Vermont and spent the next 11 years as an established allergist in the Burlington, Vermont, area. 

When his son graduated from high school, he and his wife decided to make a bold change and return to Colorado. He joined Denver Allergy & Asthma and Associates in July 2016.

When not at work, Dr. Newman loves the wilderness and the mountains, camping, hiking, canoeing, and fishing whenever he can find the time. He is married and has a grown son who lives in Salt Lake City.

Jeffrey Rumbyrt, MD, has been with the Denver Allergy & Asthma Associates team since 1994 and has served as the President of the practice since 2000.  He sees patients in Westminster, Arvada, and Lakewood.

Dr. Rumbyrt grew up in Chicago, where his love of baseball (White Sox), Lou Malnati’s pizza, classic rock, and science was first kindled. He first became interested in medicine while in high school after visiting a genetics research lab at Argonne National Laboratory.

Dr. Rumbyrt obtained his Bachelor of Arts in biology at Washington University in St. Louis, Missouri. He then attended and graduated from medical school at Loyola University of Chicago. After medical school, he completed his residency in internal medicine at Loma Linda University in California. He also completed an allergy and clinical immunology fellowship at National Jewish Health in Denver, Colorado. 

In addition to clinic responsibilities, he has been associated with Western States Clinical Research in Wheat Ridge, Colorado and has served as a principal investigator for over 50 clinical studies.  He has authored or co-authored several peer reviewed papers and book chapters.  He has served on numerous advisory boards and frequently lectures on new therapies used in the treatment of various allergic and immunologic diseases.  He is also a Clinical Professor of Medicine at the University of Colorado Health Sciences Center.

Over the years, Dr. Rumbyrt has amassed a veritable storehouse of useless trivia.  He loves to speak in accents.  His favorite topics of discussion include baseball statistics, classic rock bands and their music, and his innate inability to figure out the latest problem with his 1966 Mustang.  His three adult children have demonstrated amazing patience with his quirks.

He has a special interest in treating chronic hives, asthma, immune deficiency, and hereditary angioedema.  He looks forward to working with new and existing Denver Allergy & Asthma Associates patients. 

Shikha Gupta, MD, is a board-certified pediatrician and allergy and immunology physician. She sees patients at Denver Allergy & Asthma Associates in Boulder, Lakewood, Westminster, Denver, Littleton, and Arvada, Colorado.

Dr. Gupta attended St. Bonaventure University in Olean, New York, where she graduated magna cum laude with a Bachelor of Science in biology. She earned her medical degree from State University of New York (SUNY) Upstate Medical University in Syracuse.

Dr. Gupta completed her residency in pediatrics at the Children’s Hospital at Montefiore in the Bronx, New York, before moving to Colorado for her fellowship. She was a pediatric allergy and immunology fellow at National Jewish Health in Denver.

At Denver Allergy & Asthma Associates, Dr. Gupta strives to build lasting relationships with her patients and their families. She puts communication first, and offers comprehensive allergy and asthma care for children of all ages.

Dr. Gupta is a member of the American Academy of Allergy, Asthma and Immunology, the American College of Allergy, Asthma and Immunology, and the Colorado Allergy and Asthma Society.

Nicole Barberis, MD, FACAAI, is a board-certified physician at Denver Allergy & Asthma Associates in Boulder, Westminster, and Denver. She specializes in allergy and immunology care for adults and children.

Dr. Barberis did her undergraduate training at the University of Colorado in Boulder. After medical school, Dr. Barberis completed her residency in internal medicine at National Jewish Health/ St. Joseph Hospital in Denver. She completed her allergy and immunology fellowship at National Jewish Health/ University of Colorado in Denver.

Throughout her career, Dr. Barberis has been a strong leader and educator. She is active in the local medical community. Dr. Barberis is the President of the Colorado Allergy and Asthma Society. She has numerous publications, has participated in research and is a preceptor for medical students rotating through the clinic.

She is on the board of directors for the Aspen Allergy Conference and a member of the American Academy of Allergy, Asthma, and Immunology, the American College of Allergy, Asthma and Immunology, the Colorado Medical Society, and the Boulder County Medical Society.

Born and raised in Boulder, Dr. Barberis enjoys outdoor activities of all kinds and spending time with her family.

Dr. Barberis naturally connects with her patients, taking the time to listen and explain. Her demeanor and professionalism have earned her trust among her peers and patients. She is looking forward to helping you with your allergy needs. She is currently accepting new pediatric and adult patients. 

Kara Crosby, DO, is a board-certified pediatrician and allergy and immunology physician. She sees patients at Denver Allergy & Asthma Associates in Denver and Littleton.

Dr. Crosby attended Ohio University in Athens, Ohio, and graduated with a Bachelor of Science in biology. She earned her medical degree from the Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania.
Dr. Crosby completed her residency in pediatrics at Akron Children’s Hospital in Akron, Ohio, and her fellowship in allergy and immunology at the University of Buffalo in Buffalo, New York.
After her fellowship, Dr. Crosby moved to Colorado where has established herself as a competent and compassionate physician. She believes in treating the whole individual. She specializes in allergy testing and comprehensive treatment for adults and children of all ages at Denver Allergy & Asthma Associates.
Dr. Crosby is a member of the American Academy of Allergy, Asthma and Immunology, the American College of Allergy, Asthma and Immunology, and the Colorado Allergy and Asthma Society.

Education

Medical School: University of Iowa – Iowa City, IA

Internship

Rotating: Presbyterian Medical Center – Denver, CO

Residency

Radiology: University of Iowa Hospitals & Clinics – Iowa City, IA

Board Certification

American Board of Radiology 1977