Howell Chiropractic is a chiropractic clinic located in Davenport, IA at 4929 Utica Ridge Rd. Phone: (563) 424-1816. 57 verified patient outcomes documented on ChiropracticResults.com. Rated 5.0 out of 5 stars from 114 patient reviews. Specialties include: Acute low back pain., Chronic low back pain (LBP). Top documented result: 100% reduction in pain. Patient returned to normal activity after treatment. for Acute low back pain. in 1 visit that included PiezoWave and chiropractic adjustment. This clinic's patient outcomes are independently verified and publicly documented.