Highlands Ranch, CO
Dr. Aaron Michael Casselman is a licensed DC in Highlands Ranch, Colorado, specializing in Back Pain, Neck Pain, Headaches. Voted Best Chiropractor in Highlands Ranch for 14 consecutive years by the Highlands Ranch Herald.
DC
Dr. Aaron Casselman has been practicing chiropractic care for 22 years, 20 of those in Highlands Ranch, CO. He holds a BS in Biology from Binghamton University and a 1200-hour certificate in muscular therapy from the Muscular Therapy Institute in Cambridge, MA. He graduated as salutatorian from Life Chiropractic College West in Hayward, CA. Voted Best of the Best Chiropractor in Highlands Ranch by the Highlands Ranch Herald for 14 consecutive years. Member of the Colorado Chiropractic Association. Before becoming a chiropractor, Dr. Casselman worked as a wildlife biologist and massage therapist. He grew up in the Boston area and moved to Colorado in the 1990s to embrace the Colorado lifestyle. He is married to his wife Megan and has three children: Bodhi, Nina, and Owen. Outside the office, he enjoys skiing, mountain biking, and camping.
Voted Best Chiropractor in Highlands Ranch for 14 consecutive years by the Highlands Ranch Herald. Dr. Aaron Casselman, DC has been providing chiropractic care to the Highlands Ranch community since 2007, specializing in spinal correction, auto accident rehabilitation, scoliosis treatment, and non-surgical spinal decompression. Pinnacle Chiropractic offers a comprehensive approach including adjustments, physiotherapy, traction, Class IV laser treatment, shock wave therapy, and Ideal Protein weight loss programs. Pinnacle Chiropractic is supported by a dedicated team including Health Coach Kim (certified Integrative Nutrition Coach, Personal Trainer, Group Fitness Instructor & Menopause Specialist), chiropractic assistants Jennifer (20+ years in healthcare, CNA, Bachelor of Human Development) and McKensie (Colorado School of Healing Art graduate), and front desk staff Ashley and Lynnea who ensure every patient receives personalized attention.
Top Contributor
66+ documented outcomes
Best of Highlands Ranch
Top-rated provider
Results Assurance™
Patient protection program
Results Leader
Exceptional track record
Applied based on each patient's condition, with a focus on back pain and neck pain.
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Pinnacle Chiropractic and Spinal Rehab Center of Highlands Ranch
Achievements
DC
Dr. Aaron Casselman has been practicing chiropractic care for 22 years, 20 of those in Highlands Ranch, CO. He holds a BS in Biology from Binghamton University and a 1200-hour certificate in muscular therapy from the Muscular Therapy Institute in Cambridge, MA. He graduated as salutatorian from Life Chiropractic College West in Hayward, CA. Voted Best of the Best Chiropractor in Highlands Ranch by the Highlands Ranch Herald for 14 consecutive years. Member of the Colorado Chiropractic Association. Before becoming a chiropractor, Dr. Casselman worked as a wildlife biologist and massage therapist. He grew up in the Boston area and moved to Colorado in the 1990s to embrace the Colorado lifestyle. He is married to his wife Megan and has three children: Bodhi, Nina, and Owen. Outside the office, he enjoys skiing, mountain biking, and camping.
Specialties:
Certifications:
What patients are saying about their care
"Patient with disc bulge experienced severe morning stiffness lasting 60 minutes daily. After 5 weeks of decompression therapy, morning stiffness reduced to 15 minutes with improved overall mobility."
"Patient unable to sit for more than 20 minutes due to disc-related pain. After 9 weeks of decompression and core activation, sitting tolerance increased to 90 minutes with 55% pain reduction."
"Patient with degenerative spinal changes experienced daily sciatic pain episodes. After 12 weeks of decompression care, sciatic episodes reduced from daily to occasional with improved quality of life."
These are general guidelines. Always consult a qualified healthcare provider to determine if chiropractic care is appropriate for your specific situation.
Real results from real patients
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62 conditions with verified treatment outcomes
56 more conditions treated
Real patient stories and treatment outcomes
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Visual evidence of treatment results including X-rays, scans, and clinical photos
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Data-driven insights from patient outcomes
Distribution of verified outcomes by condition
Patient improvement percentage by condition
Professional endorsements from healthcare providers
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Real progress. Real proof.
Every story below is backed by verified data collected right inside the clinic — not just opinions. These aren't reviews; they're outcomes that show what's possible when chiropractic care is measured, consistent, and patient-centered.
Avg. Pain Improvement
92%
After 6 weeks of care
Avg. Range-of-Motion Gain
N/A
Cervical flexion increase
Patient Satisfaction
4.9 / 5
Based on verified check-ins
Recommend to Others
98%
Would refer a friend
Data sourced from 66 verified outcome submissions between Dec 2025 – Apr 2026
"My hip and neck pain improved significantly with care."
– Verified Patient, April 2026
"My lower back and right hip pain improved significantly with care."
– Verified Patient, April 2026
"My lower back/hip pain improved significantly with care."
– Verified Patient, April 2026
"My lower back pain improved significantly with care."
– Verified Patient, April 2026
"My neck and back pain improved significantly with care."
– Verified Patient, April 2026
"My lower back and hip pain improved significantly with care."
– Verified Patient, April 2026
"My neck pain improved significantly with care."
– Verified Patient, April 2026
"My neck pain improved significantly with care."
– Verified Patient, April 2026
"My lower back pain improved significantly with care."
– Verified Patient, April 2026
"My upper back pain improved significantly with care."
– Verified Patient, April 2026
"My lower back pain improved significantly with care."
– Verified Patient, April 2026
"My postural dysfunction / back pain / neck pain improved significantly with care."
– Verified Patient, March 2026
4.9 / 5 Patient Satisfaction
Based on verified visit surveys — not open internet reviews.
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Travis S. • Mar 30, 2026
I have been seeing Dr. Casselman for years, from initial injury rehab and cervical spine correction to monthly maintenance and general wellness. Every experience has been a pleasure. He provides excellent education and information about the issues and procedures, and has been open, honest, fair in all transactions. I highly recommend him to anyone seeking chiropractic care. His staff is extremely helpful and wonderful to work with as well.
Gabriela S. • Mar 30, 2026
My husband and I have been clients of Pinnacle Chiropractic & Spinal Rehab Center in Highlands Ranch for over two years, and we are absolutely in love with the care we receive from Dr. Eric Casselman. As former professional athletes, we understand the importance of body maintenance. We continue to come in for adjustments every few weeks to maintain our health and support our active lifestyles. Dr. Eric has an amazing crew working alongside him who provide outstanding service. We truly appreciate the warm, friendly environment and the personal approach they take with every patient. To get the most out of chiropractic care, you have to trust the person you are entrusting your body to. Dr. Eric has incredible skills in earning that trust and helping his patients heal in a very unique and effective way. We cannot recommend them enough! They are simply the BEST!
Josie A. • Mar 30, 2026
I love going to Pinnacle Chiropractic—well, almost everything about it. Neck traction isn't my favorite, but it's necessary and has made a significant difference in the structure of my neck. Dr. Casselman's approach is completely different from other chiropractors I've seen. His focus is on true healing, not just quick adjustments to the neck/spine. Treatment feels much more like physical therapy, with a long-term plan rather than a temporary fix. My low back pain is gone and so are my horrible headaches. Ash, McKenzie, and Jen are all amazing—professional, caring, and always welcoming. I highly recommend Pinnacle Chiropractic!
Dustin R. • Mar 30, 2026
Dr. Casselman has been my go to chiropractor for almost 20 years. His staff is always friendly and welcoming. He is the most caring chiropractor I have ever been treated by, he's always looking for new and innovative ways to help his patients. He checks up regularly and gives great information to help his patients understand injuries and treatment options. Thanks Doc and team
Jenny G. • Mar 30, 2026
I have gone to so many chiropractors since 2008 and Dr. Casselman is the only doctor that actually helped me return to my normal self, physically and mentally. It took Dr. Casselman only a year to fix me while it took other chiropractors more than couple of years to go nowhere. I wish I knew about Dr. Casselman back in 2008, when I first got rear-ended by a reckless, irresponsible, and non-insured driver. My life would have been so much better ever since. Dr. Casselman is very caring, compassionate, attentive, and amazing in every way. His staff is super nice. Ash is always friendly, sweet and very good with her job. McKenzie and other staff are super nice, understanding and gentle. They know EVERYONE by name, very impressive. Thank you Dr. Casselman and your staff from the bottom of my heart for making me whole again!
Showing 5 of 40 reviews
Dr. Aaron Michael Casselman has a 5.0-star rating based on 40 patient reviews. Patients have reported 66 verified outcomes with documented improvements.
Yes, Pinnacle Chiropractic and Spinal Rehab Center of Highlands Ranch is open today. Today's hours are 9am-6pm. Call 3036835060 to schedule an appointment.
Pinnacle Chiropractic and Spinal Rehab Center of Highlands Ranch is located in Highlands Ranch, CO. You can find directions and the full address in the contact section above.
Dr. Aaron Michael Casselman specializes in Back Pain, Neck Pain, Headaches and 12 more areas. View the full list of conditions treated in the outcomes section.
You can schedule an appointment by calling 3036835060 or visiting their website. Most clinics accept walk-ins, but calling ahead is recommended.
Yes. Dr. Aaron Michael Casselman has documented verified outcomes for hip and neck pain patients. Review the outcomes section above for detailed improvement data and patient stories.
Yes. Dr. Aaron Michael Casselman uses Chiropractic Adjustments and Activator Method among other methods, which include low-force and instrument-assisted approaches.
Yes. Pinnacle Chiropractic and Spinal Rehab Center of Highlands Ranch accepts Blue Cross, Anthem, Humana and 5 other insurance plans. Contact the clinic to verify coverage for your specific plan.