Meet The Team

Dr. Jason Langslet, DC/Owner

Board Certified NUCCA Doctor

Dr. Jason Langslet graduated from Palmer College of Chiropractic in Davenport, Iowa. His chiropractic journey began in 2007 when his first visit to a chiropractor drastically improved his athletic performance in Track & Field. It was not until he enrolled in chiropractic school that he was introduced to the NUCCA technique, but he has since developed an unmatched passion for this incredible work. While at Palmer, he spent much of his extracurricular time in the NUCCA club, as well as the Delta Sigma Chi professional chiropractic fraternity. He served a term as president in each of these organizations.

Aside from his time at school, Dr. Jason has spent his life in Mundelein, IL and feels fortunate to call the Chicagoland area his home. He aims to do his part in making NUCCA and spinal health well-known in the homes of thousands throughout Chicago. He believes that everyone deserves to experience life optimally and knows that specific upper cervical care is crucial to making this a possibility. Expect miracles!

Dr. Jason is one of only 30 Board Certified NUCCA doctors worldwide. He currently serves on the NUCCA Collegiate Curriculum Committee and enjoys being a mentor for other NUCCA doctors who are also working toward their board certification. His patients range in age from 11 months to 97-years-old. He has been privileged to help patients with a number of different conditions and health concerns such as: musculoskeletal conditions, headaches and migraines, vertigo/dizziness, memory issues, ADD/ADHD, digestive concerns, degenerative conditions, numbness and tingling, neurological dysfunction and many more.


¡Se habla Español!

Request a complimentary consultation today by calling us at 847-272-1000! 

Dr. Daiki Ishiyama, DC

Board Certified NUCCA Doctor

Born in Tokyo, Japan. Dr. Daiki Ishiyama graduated Doctor of Chiropractic from Palmer College of Chiropractic in Davenport, Iowa in 2008. Dr. Ishiyama is one of the only 30 NUCCA board certified doctors worldwide specializing in identifying and correcting the structural displacement that impairs function of the brainstem and central nervous system, and an authority on the diagnosis and treatment of adults and children with headaches, musculoskeletal conditions, spinal disc syndrome, back and neck pain, auto or work related injuries, and other neurologically based conditions. He is a caring and highly educated doctor who can help you maximize your life and well being.

Feel free to ask any questions in English and Japanese.

For our patients in Asia, contact his Japan office.

North America


  • Upper Cervical Council Asia | President
  • Japne Blow Golf Association | Board of Directors
  • Kinetikos | Advisory Board


  • NUCCA 認定専門医 / 指導医 Board Certified NUCCA Doctor (アジア唯一 / 世界25名)
  • UCRF [上部頸椎リサーチファンド] 役員
  • ICA Council on Upper Cervical Care [ICA 上部頸椎ケアカウンシル] | アドバンスイメージ代表
  • パーマー大学 Doctor of Chiropractic 2008
  • カイロプラクティック医ライセンス [イリノイ州/カルフォルニア州/ハワイ州 ]
  • 米国理学療資格


  • Upper Cervical Council Asia [上部頸椎カウンシルアジア] | 代表
  • 日本ブローゴルフ協会 理事
  • Kinetikos アドバイザー

Dr. Marshall Dickholtz, DC

Board Certified NUCCA Doctor

Dr. Marshall Dickholtz Jr. is one of only 30 Board Certified NUCCA doctors worldwide. As founder of HealthSmart, he practices in Northbrook, Illinois and is an authority on the diagnosis and treatment of adults and children with headaches, musculoskeletal conditions, spinal disc syndrome, back and neck pain, and other neurologically based conditions. He has more than thirty years of experience and has treated approximately 10,000 individual patients as an upper cervical specialist.

In 1978, Dr. Dickholtz completed his Doctor of Chiropractic degree at Palmer University with awards in radiology and leadership. He continued his education receiving his NUCCA Board Certification in 1993. He is an expert in his field. He is a leader, a teacher, an author, an expert and one of the most renowned specialists in NUCCA care today. His expertise in this care has appeared on Good Morning America, Healthbeat with Sylvia Perez in Chicago and Discovery Health Channel.

Catherine (C.C.) Pujals, Patient Care Coordinator

Catherine (C.C.) Pujals has been a Front Desk Patient Coordinator with HealthSmart since 2018. She learned about HealthSmart though in 2004 after being in a significant car accident. The NUCCA Chiropractic care she received from HealthSmart made a huge difference in her recovery.

C.C. is originally from Queens, New York. She received a Math Degree at St Mary’s College in South Bend Indiana and started her career in computer consulting in Chicago. She has been married to her husband Pedro since 1990.  In 1995 she left her career to raise her three sons. Once they were grown, C.C. decided to go back into the workforce. She tried a few different jobs, working for 5 years with Autistic children in the school district as a teacher’s aide, also as a job coach for a young Adult with Down Syndrome. Then she worked in the Health/Life Insurance industry as a Broker. When she heard about the position at HealthSmart she knew it would be a good fit. C.C. loves working with and helping all the patients at HealthSmart and feels the staff is like family.

Natalie Raczka, Office Manager

With over 24 years of dedicated service, Natalie Raczka is the cornerstone of our administrative operations at HealthSmart. As the Office Manager, Natalie ensures seamless day-to-day functioning, combining her wealth of experience with a knack for organization and efficiency.
Natalie’s commitment to excellence and her deep understanding of HealthSmart’s ethos have made her an invaluable asset to our team. Her passion for fostering a positive work environment and her unwavering dedication to supporting her colleagues make her a trusted leader within our organization.

Outside of her role as Office Manager, Natalie enjoys spending time with her family and keeping busy with her two daughters and all their sports activities. There’s nothing more rewarding than watching and cheering from the sidelines. As they chase their passions and strive for excellence, she relishes every moment spent supporting them.