Our Hours

Monday: 8:30AM - 7PM

Tuesday: 8:30AM - 7PM

Wednesday: 8:30AM - 7PM

Thursday: 8:30AM - 7PM

Friday: Morning appointments only

Saturday: Closed

Sunday: Closed


Additional Information

We accept the following insurances: Anthem, Blue Cross, Blue Shield, Medicaid

Around the Office


Meet our Therapists


Mary Wallace

M.A. CCC-SLP BCS-F

Mary Wallace graduated in 1983 from the University of Colorado, Boulder, with her Master's degree in Communication Disorders and Speech Science. In addition, Mary has been a Board Certified Specialist in Fluency since 2001.  She is certified by the American Speech, Language and Hearing Association and is on the Colorado specialists referral list of the Stuttering Foundation of America. Mary has specialized exclusively in the diagnosis and treatment of stuttering in both children and Adults, working primarily in private practice, since 1984. Additional experience includes providing clinical supervision of Master's level graduate students and organizing and implementing a state-wide speech-language-hearing screening program.

Mary and longtime colleague Patty Walton opened the Center for Stuttering Therapy in Boulder and Denver in 1992.  Mary is the primary owner and practitioner in the Boulder office. She provides consultation services, training workshops for parents, speech pathologists and educators, and traditional and intensive stuttering therapy for children and adults across the United States and internationally.  Stuttering is her passion and her life's work.

Mary is the co-author of the preschool treatment book, "Fun With Fluency", and has published several articles concerning stuttering in national and international journals. She has presented extensively both on a state and national level in the area of fluency disorders.  

Mary lives in Boulder with her husband.  She has two grown sons, both of whom stuttered when they were younger. When not at the Center, Mary enjoys skiing, biking, reading and cooking.

Chelsea Blanchard

M.A. CCC-SLP

Chelsea graduated from the University of Colorado in Boulder with a degree in Speech Language and Hearing Sciences and completed a Masters degree in Speech Language Pathology at the University of South Carolina.  During graduate school, Chelsea completed a thesis in the area of fluency as it has always been of interest to her. She has been at the Center for Stuttering Therapy since 2010. Chelsea completed an internship at the Center for Stuttering Therapy prior to becoming a therapist here. Additionally, she works in a public school in Colorado, doing therapy with stuttering, language delays, articulation, voice and social pragmatics. In her free time, Chelsea enjoys traveling, hiking, cooking and spending time with her family.

Allegra L. Michael

M.A. CCC-SLP

Allegra received her Bachelor's degree from Duke University with a major in Linguistics and a minor in Religion. She received her education in Speech-Language Pathology from the University of Colorado at Boulder and has a Master of Arts in Speech, Language, and Hearing Sciences. Allegra is professionally licensed by the State of Colorado and the Colorado Department of Education to practice as an SLP and is also certified by the American Speech-Language-Hearing Association (ASHA). She completed an internship in the Boulder Valley Public Schools and most currently works in private practice at the Center for Stuttering Therapy. Allegra has expertise in fluency therapy, articulation, phonological delay, and early childhood language development. Outside of work, she enjoys being outdoors with her two young daughters, traveling, and playing the violin.

Matthew Goldman

M.A. CCC-SLP

Matthew graduated from the University of Connecticut with degrees in Psychology and Anthropology and completed a Masters degree in Speech Language Pathology at the University of Colorado in Boulder.  During graduate school, Matthew focused on fluency and stuttering and completed an internship at the Center for Stuttering Therapy prior to graduating.  He currently works at the Center for Stuttering Therapy and in a public school in Colorado, doing therapy with stuttering, articulation, voice, reading, social pragmatics and language delay.  In his free time, Matthew enjoys playing banjo and guitar, hiking, biking and reading.