COVERED PROCEDURES AND SERVICES
Facet joint interventions include intraarticular (IA) injections, medial branch blocks (MBB), radiofrequency ablations (RFA), and facet cyst rupture/aspiration. Procedures apply only to cervical/thoracic and lumbar/sacral facet joints. Use CPT codes 64490-64495 for facet joint injections with fluoroscopy or CT guidance; 64633-64636 for radiofrequency ablation with imaging guidance. Ultrasound guidance procedures (e.g., 0213T-0218T) are not covered. Bilateral procedures reported with modifier -50.

ICD-10 CODING AND DIAGNOSTIC THEMES
Covered ICD-10 codes primarily include spondylosis without myelopathy or radiculopathy and related dorsopathies (e.g., M47.812-M47.817, M48.12-M48.17, M53.82-M53.87). Diagnosis must exclude non-facet pathology such as fracture, tumor, infection, or significant deformity.

MEDICAL NECESSITY AND DIAGNOSTIC REQUIREMENTS
Patients must have moderate to severe chronic axial neck or low back pain ≥3 months with functional deficits documented by consistent pain and disability scales. Pain must fail to improve with conservative noninvasive management. No untreated radiculopathy or neurogenic claudication unless due to facet cyst compression.
Diagnostic facet joint procedures confirm facet syndrome presence; dual diagnostic blocks with ≥80% pain relief are required before proceeding to therapeutic procedures or RFA.
Second diagnostic block separated by minimum two weeks unless documented exception.
Therapeutic injections require prior diagnostic blocks with documented ≥80% relief and failure or contraindication to RFA. Documentation explaining inability to undergo RFA required.
Radiofrequency ablation requires prior successful diagnostic MBBs and pain relief ≥50% lasting at least six months for repeats.
Facet cyst aspiration/rupture indicated only with advanced imaging confirming nerve root compression by cyst and correlating symptoms; repeat aspiration limited to once per cyst with ≥50% pain relief for ≥3 months.

IMAGING AND PROCEDURAL GUIDANCE
Facet joint interventions require fluoroscopic or CT image guidance; procedures without such guidance or under ultrasound or MRI are non-covered and considered not reasonable and necessary.

FREQUENCY AND UTILIZATION LIMITS
Maximum of four diagnostic and four therapeutic facet joint sessions per spinal region per rolling 12 months.
Maximum of two RFA sessions per spinal region per rolling 12 months.
One to two levels (unilateral or bilateral) allowed per session per spinal region; three or more levels per session are non-covered.

CODING AND BILLING REQUIREMENTS
One unit reported per facet level treated; bilateral procedures appended with modifier -50.
Dosage and code assignment must follow AMA CPT guidelines; facet cyst interventions and RFA codes reported per joint, not per nerve.
KX modifier required for all diagnostic injections to indicate medical necessity. Aberrant KX use may trigger review.
Claims must include valid ICD-10 diagnosis corresponding to the treatment indication; missing diagnosis codes result in claim return.
Multiple blocks on same day discouraged unless justified, such as cyst with radiculopathy.

SEDATION AND ANESTHESIA
Moderate or deep sedation, general anesthesia, and monitored anesthesia care (MAC) not reasonable or necessary during facet injections.
Moderate sedation or MAC may be considered for RFA or cyst rupture only with documented medical necessity beyond patient preference or anxiety.

NONCOVERED SERVICES AND DENIAL RISK
Facet joint interventions without appropriate image guidance are denied.
Use of biologicals or substances not FDA-designated for facet joint injections leads to claim denial.
Intraarticular or extraarticular prolotherapy, non-thermal denervation techniques, intra-facet implants, or procedures post-anterior lumbar interbody fusion (ALIF) are non-covered.
Diagnostic injections at levels previously successfully treated by RFA are not covered.

DOCUMENTATION REQUIREMENTS
Medical records must document baseline and post-procedure pain and disability assessments using consistent scales (e.g., NRS, VAS, Oswestry Disability Index).
Documentation must include relevant clinical assessment, diagnostic imaging, procedure notes, and rationale for treatment choice, especially when RFA is not performed.
Provider qualifications require appropriate training, credentialing, and adherence to scope of practice per state law.

CONTRACTOR AND POLICY REFERENCES
Policy outlined in LCD L38801 version 23 and Article A58403 version 25.
CMS Internet-Only Manuals referenced include Medicare Benefit Policy Manual Chapter 15 Section 50, NCD Manual Chapter 1 Sections on acupuncture and prolotherapy, Claims Processing Manual Chapter 13, and Program Integrity Manual Chapter 13 Section 13.5.4.
Providers must comply with National Correct Coding Initiative (NCCI) edits and Modifier usage per CMS guidelines.

COMMON WORKFLOW EXPECTATIONS
– Confirm patient's chronic axial pain with supporting ICD-10 diagnosis.
– Ensure prior conservative management failed before proceeding to intervention.
– Perform diagnostic facet blocks with image guidance, document ≥80% pain relief before therapeutic injections or RFA.
– Append modifier -50 for bilateral procedures.
– Use KX modifier for diagnostic blocks indicating medical necessity.
– Maintain detailed documentation of pain/disability scales, imaging results, and treatment rationale.
– Avoid sedation unless medically justified and documented for RFA/cyst procedures.
– Limit levels and frequency of procedures per policy limits.
– Avoid multiple injections on same day without clear clinical indication.

NOT CLEARLY STATED IN SOURCE
– Specific conservative care modalities required before interventions.
– Exact time frame for conservative treatment prior to intervention.
– Detailed guidance on imaging protocols beyond required modality (fluoroscopy or CT).