3434 47th Street Suite 200, Boulder, CO 80301

Meet Our K2 Derm Team

At the heart of our practice is a team dedicated to collaboration, care, and expertise. Led by Dr. Koger, we bring unmatched dermatological knowledge and experience to every patient, ensuring personalized solutions designed to help you achieve healthy, radiant skin.

Boulder Strong, Boulder Proud

With deep roots in the Boulder community, we understand the unique challenges its high-altitude, dry mountain environment poses for your skin. Our team is committed to serving this vibrant community with cutting-edge technology, best-in-class equipment, and a genuine passion for skincare.

Whether you’re seeking advanced treatments or everyday care, we’re here to guide you every step of the way. We’re here to help you achieve healthy, radiant skin—just like the natural beauty of Boulder.

Dr. Cathy Koger is a board certified dermatologist and a fellow of the American Academy of Dermatology as well as a fellow of the American Osteopathic Board of Dermatology. Dr. Koger graduated with a BSE in Mechanical Engineering from the University of Michigan and worked as an engineer for over 6 years at Raytheon Systems Company and IBM.

Dr. Cathy Koger

Cathy Koger, D.O. is a board certified dermatologist and a fellow of the American Academy of Dermatology as well as a fellow of the American Osteopathic Board of Dermatology. Dr. Koger graduated with a BSE in Mechanical Engineering from the University of Michigan and worked as an engineer for over

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Brenda Winski NP-C at K2 DErmatology in Boulder, CO

Brenda Winski NP-C

Brenda Winski is a board-certified nurse practitioner, nationally certified by the American Academy of Nurse Practitioners (AANP) and licensed by the state of Colorado. Prior to becoming a nurse practitioner, Brenda was an emergency room nurse for 15 years. She has also had the privilege of working in family practice/internal

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Kirsten Revitte has been a Board Certified Physician Assistant since 2020 when she graduated from Midwestern University in Glendale, AZ with a Master’s in Physician Assistant Studies. She attended the University of Colorado at Boulder where she earned her Bachelor’s in Integrative Physiology and English Literature. After graduating from CU Boulder, she worked at K2 Dermatology as a medical assistant prior to attending her Physician Assistant program.

Kirsten Revitte PA-C

Kirsten Revitte has been a Board Certified Physician Assistant since 2020 when she graduated from Midwestern University in Glendale, AZ with a Master’s in Physician Assistant Studies. She attended the University of Colorado at Boulder where she earned her Bachelor’s in Integrative Physiology and English Literature. After graduating from CU

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Shannon Ross is a board-certified Physician Assistant specializing in dermatology. Shannon earned her undergraduate degree from the University of Colorado, Boulder, where she graduated Summa Cum Laude with distinction. Shannon then pursued a Masters's Degree and Physician Assistant Certification from Duke University in 2003.

Shannon Ross PA-C

Shannon Ross is a board-certified Physician Assistant specializing in dermatology. Shannon earned her undergraduate degree from the University of Colorado, Boulder, where she graduated Summa Cum Laude with distinction. Shannon then pursued a Masters’s Degree and Physician Assistant Certification from Duke University in 2003. She has been a practicing, board-certified

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Samita Shah has been passionate about healthcare since she began volunteering at a hospital in Michigan. She now has a bachelor's degree from Michigan State University in Human Biology, specializing in health promotion, where she remained on the Dean's List. Samita received her Master of Science in Physician Assistant Studies from Grand Valley State University in Grand Rapids, MI. She is fellowship trained in dermatology and is certified by the National Commission of Certified Physician Assistants. She is a member of the American Academy of Physician Assistants and Society of Dermatology Physician Assistants.

Samita Shah PA-C

Samita Shah has been passionate about healthcare since she began volunteering at a hospital in Michigan. She now has a bachelor’s degree from Michigan State University in Human Biology, specializing in health promotion, where she remained on the Dean’s List. Samita received her Master of Science in Physician Assistant Studies

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K2 Monthly Specials 2025

FEBRUARY:

20% Off Botox (20 units minimum)

MARCH:

20% Off Laser/IPL

APRIL:

25% Off REVISION® Products

MAY:

25% Off eltaMD® Products

JUNE:

25% Off Latisse®

JULY:

25% Off Heliocare and Strataderm/Stratamed

AUGUST:

20% Off Botox (20 units minimum)