Starting July 1, 2024, Minnesota Sleep Institute providers and staff are joining Allina, and NorthStar Sleep Center will become Allina Health Sleep Center - Coon Rapids.

Different name, same great care.

Continue to visit our website for updates leading up to the transition. | Frequently Asked Questions.

Physicians & Providers

Charles O. Gensmer, M.D.

Dr. Charles Gensmer graduated from the University of Minnesota Medical School, and completed his residency in Internal Medicine and fellowship in Pulmonary Medicine at the University of Cincinnati. Dr. Gensmer is board-certified in Internal Medicine, Pulmonary Disease and Sleep Medicine.…

Kevin R. Grullon, M.D.

Dr. Kevin Grullon graduated from the Pontificia Universidad Catolica Madre y Maestra (PUCMM) School of Medicine in Santiago, Dominican Republic. He completed his residency in Internal Medicine at Wayne State University in Detroit, where he also completed fellowships in both Pulmonary/Critical Care and Sleep Medicine. Dr. Grullon served on the faculty at Oakland University William Beaumont School of Medicine for several years before moving to Minnesota. He is board-certified in Internal Medicine, Pulmonary Disease, Sleep Medicine and Critical Care Medicine.…

Patrick J. Wright, M.D.

Dr. Patrick Wright graduated from the University of Minnesota Medical School. He completed his internship at Virginia Mason Hospital in Seattle, his residency in Internal Medicine at Abbott Northwestern Hospital in Minneapolis, and his fellowship in Pulmonary/Critical Care Medicine at Northwestern University in Chicago. He is board-certified in Internal Medicine, Pulmonary Disease, Sleep Medicine and Critical Care Medicine.…

Sarah Bolstad, PA-C

Sarah Bolstad graduated from St. Olaf College in Northfield, Minnesota with a Bachelor of Arts degree in Biology. She earned her Bachelor of Medical Science in Physician Assistant Studies from Midwestern University in Downers Grove, Illinois. She is certified through the National Commission on Certification of Physician Assistants, and is a member of the Minnesota Academy of Physician Assistants and the American Academy of Physician Assistants.…

Angela Smaciarz, CNP

Angela Smaciarz is a Certified Adult and Geriatric Nurse Practitioner. She is originally from St. Louis Park, MN and completed Nurse Practitioner training at St. Catherine University in St. Paul. Angela is certified by and is a member of the American Association of Nurse Practitioners, and is also a member of Minnesota Nurse Practitioners.…

Hannah Warkel, PA-C

Hannah Warkel graduated from Gustavus Adolphus College in St. Peter, Minnesota with a Bachelor of Arts degree in Biology. She earned her Master of Physician Assistant Studies degree from Rocky Mountain College in Billings, Montana. She is certified through the National Commission on Certification of Physician Assistants, and is a member of the Minnesota Academy of Physician Assistants and the American Academy of Physician Assistants.…