Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/30/2025

Medical Necessity Review for Spinal Injection Procedures

Primary Recommendations

  • The American College of Physicians recommends epidural steroids for radiculopathy when conservative treatment fails 5
  • The British Pain Society emphasizes that interventions should target the identified pain generator, and this patient's primary complaint is radicular pain, not facetogenic or SI joint pain 2, 3, 4

Individual Procedure Assessments

  • Up to 3 levels bilaterally (6 total injections) of facet joint injections are permitted per session per CPB criteria, but the American College of Neurosurgery recommends facet joint injections only when radiculopathy is absent 1
  • The British Pain Society consensus states therapeutic facet joint intra-articular injections should only be performed in the context of clinical governance, audit, or research due to lack of efficacy evidence 2, 3, 4
  • Studies show only 7.7% of patients achieve complete relief with facet injections, and only 4% achieve significant relief with controlled diagnostic blocks 1
  • Up to 2 therapeutic/diagnostic SI joint injections are permitted per CPB criteria, but cannot be repeated more frequently than every 7 days per CPB 1
  • MRI shows no evidence of active inflammation in the sacroiliac joints, which questions the appropriateness of SI joint injections as a pain generator 1

Treatment Approach

  • The American College of Physicians recommends proceeding with interlaminar epidural steroid injection (62323) as the first-line invasive intervention for radicular symptoms with radiation to lower extremity 5
  • If ≥50% improvement in radicular symptoms, continue conservative management, but if <50% improvement, consider diagnostic approach for other pain generators 1
  • Consider ONE additional modality based on clinical examination, such as diagnostic medial branch blocks for facet loading maneuvers positive, or bilateral SI joint injections if SI joint provocation tests positive AND imaging shows SI joint pathology 1, 5

Evidence-Based Concerns

  • Facet injections are contraindicated with radiculopathy, and guidelines specifically state facet joint injections are insufficient evidence for back pain with untreated radiculopathy 1
  • Lack of SI joint inflammation on imaging questions the appropriateness of SI joint injections 1
  • No guideline supports simultaneous multi-level, multi-modality injections as initial invasive treatment 2, 3, 5

Clinical Reasoning

  • Performing multiple procedures simultaneously makes it impossible to determine which intervention provided benefit, compromising future treatment planning 2, 3
  • Multiple simultaneous injections increase procedural risks, medication exposure, and costs without evidence of superior outcomes 2
  • Interventions should target the identified pain generator, and this patient's primary complaint is radicular pain, not facetogenic or SI joint pain 2, 3, 4