AI-generated draft from CMS source. Review and verify clinical accuracy before use.

**Pre-Procedure Clinical Justification and Planning**
Patient reports moderate-to-severe chronic axial (neck or low back) pain lasting at least 3 months, significantly impairing function including walking, sitting, standing, sleep, and ADLs.
Documented failure of conservative management including physician-directed physical therapy, medication trials (NSAIDs, muscle relaxants), and home exercise program.
Absence of untreated radiculopathy or neurogenic claudication based on clinical exam and imaging review, except if associated with facet joint synovial cyst.
Imaging studies (MRI/CT) exclude alternative pain sources such as fracture, tumor, infection, or significant spinal deformity.
Pain and functional disability assessed and recorded using consistent scales (e.g., Numerical Rating Scale [NRS] and Oswestry Disability Index [ODI]).

**Diagnostic Facet Joint Procedure Documentation**
Rationale: Diagnostic medial branch block (MBB) or intra-articular (IA) facet joint injection performed with fluoroscopic or CT guidance at the targeted single spinal region and level(s).
Document the specific facet joint level(s) targeted unilaterally or bilaterally, noting that bilateral injections at a level count as one level intervention (use modifier -50 for bilateral).
Initial diagnostic facet joint injections performed to confirm facet syndrome as pain source; include KX modifier on claim lines for each diagnostic injection.
If initial MBB not feasible/contraindicated due to documented anatomic restrictions, IA injection may be performed, with documentation of justification.
Pain relief documented immediately post-procedure and during follow-up using the same pain scale, with ≥80% relief required to support medical necessity for subsequent therapeutic interventions.
Second confirmatory diagnostic injection at same level performed minimum 2 weeks after first, unless exceptional documentation justifies earlier timing.
Limit diagnostic injections to no more than 4 sessions per spinal region within 12 months.

**Therapeutic Facet Joint Injection Documentation**
Patient meets criteria for therapeutic injection: documented ≥80% relief from two prior diagnostic facet joint procedures and documented reasons patient is not a candidate for radiofrequency ablation (e.g., spinal pseudarthrosis, implanted electrical device).
Therapeutic injections limited to 1 or 2 levels per spinal region/session, unilateral or bilateral, with proper CPT coding and modifiers.
Post-therapeutic injection follow-up documents at least 50% consistent pain relief lasting ≥3 months or ≥50% improvement in functional activities (e.g., walking tolerance, ADLs) compared to baseline.
Frequency limited to 4 therapeutic facet joint injection sessions per spinal region per 12 months.

**Radiofrequency Ablation (Neurotomy) Documentation (CPT 64635 and related codes)**
Performed only following two successful diagnostic MBBs with sustained ≥80% pain relief at targeted medial branch nerves.
Repeat RFA justified by documented ≥50% pain relief lasting at least 6 months or ≥50% improvement in functional ADLs relative to baseline.
Procedural documentation must clearly identify the treated facet joint level(s) and laterality with modifier -50 if bilateral.
Use fluoroscopic or CT guidance; ultrasound-guided or unguided neurotomies are not covered.
Sedation limited to cases with documented medical necessity (e.g., patient inability to cooperate due to medical conditions). Routine moderate or deep sedation, MAC, or general anesthesia is not supported.
Frequency limited to 2 RFA sessions per spinal region per 12 months.

**Facet Cyst Aspiration/Rupture**
IA injection with synovial cyst aspiration performed with image guidance when advanced imaging confirms cyst causing nerve root compression or displacement correlated with clinical signs and symptoms.
Repeat cyst aspiration/rupture may be performed once per individual cyst only if patient achieves ≥50% consistent pain relief lasting at least 3 months following prior procedure.

**Imaging and Procedural Guidance**
All facet joint injections, diagnostic blocks, therapeutic injections, RFAs, and cyst interventions must be performed with fluoroscopic or CT guidance.
Ultrasound-guided facet procedures are not covered.

**Coding, Laterality, and Modifiers**
Report each unilateral or bilateral intervention as 1 unit; append modifier -50 for bilateral procedures.
Limit injections or destructions to 1 or 2 levels per session per spinal region; third or additional levels reported separately but no more than once per day, not exceeding allowed limits.
For bilateral injections at T12-L1 and L1-L2 levels, use CPT codes 64490/64494 with modifier -50 as appropriate.

**Contraindications and Coverage Considerations**
Do not perform facet joint interventions in presence of radiculopathy not attributable to facet pathology (except synovial cyst cases), severe deformity, infection, fracture, or tumor.
Do not perform intra-facet joint injections or medial branch blocks at same level following previous successful RFA without new diagnostic confirmation.
Do not use biological agents, prolotherapy, non-thermal denervation methods, intra-facet implants, or perform facet procedures post-anterior lumbar interbody fusion (ALIF); such claims will be denied.

**Sedation and Anesthesia Documentation**
Avoid moderate or deep sedation, MAC, or general anesthesia for diagnostic and therapeutic facet injections.
Sedation during RFA or cyst rupture/aspiration may be considered only with clear documented medical necessity. Avoid routine use to minimize audit risk.

**Post-Procedure Follow-up and Documentation**
Assess and document pain relief and functional improvement using the same validated pain and disability scales as baseline.
Note any improvement in walking, sitting, standing tolerance, sleep quality, ADLs, or work activity impairment following facet interventions.
Document any complications or adverse events related to the procedure.

**Risk Mitigation for Medicare Audit and Utilization Review**
Include comprehensive documentation of conservative treatment failure and confirmation of medical necessity for each procedure.
Utilize appropriate ICD-10-CM diagnosis codes representative of facet syndrome (e.g., M47.816, M53.86) and ensure diagnosis codes justify the procedure.
Append KX modifier only to diagnostic injections per CMS instructions.
Ensure documentation aligns with CPT coding guidance and LCD L38765 version 27.
Avoid same-day multiple spinal region facet interventions; limit to one spinal region per session.