
CMI Treatments
Pelvic Region
- Sacroiliac Joint Injection: Addresses pain in the lower back, pelvis, or buttocks often caused by SI joint dysfunction.
- Coccygeal Nerve Block: Provides relief from tailbone (coccyx) pain.
F.A.Q.
A sacroiliac (SI) joint injection delivers corticosteroid medication directly into the joint connecting the lower spine and pelvis. It is used for patients with low back pain, buttock pain, or leg pain caused by SI joint dysfunction, inflammation, or arthritis.
A sacrococcygeal injection targets the joint between the sacrum and the coccyx (tailbone). It is used to treat coccydynia and sacrococcygeal joint inflammation. At CMI, the procedure is performed under image guidance to ensure precise needle placement.
CMI uses ultrasound or fluoroscopic image guidance for all sacroiliac and pelvic injections. Real-time imaging confirms exact needle placement before medication is delivered, improving accuracy and reducing discomfort compared to unguided injections.
The local anesthetic used during the procedure may provide immediate short-term relief. The corticosteroid component typically takes two to seven days to reach full effect. Most patients report meaningful improvement within one week of their pelvic injection.
Yes, a physician referral is required. Your referring physician should include your diagnosis, relevant imaging results, and a brief treatment history so CMI can prepare the appropriate treatment plan before your appointment.

