CPT 97033: Iontophoresis for Transdermal Medication Delivery
Medicare pays $20 and commercial payers pay $43 on average nationally for this procedure.
CPT code 97033 describes iontophoresis — the use of electric current to deliver medication through the skin — billed in 15-minute timed units; this therapeutic modality is typically provided as a physical therapy intervention in outpatient rehabilitation or clinic-based settings for focal conditions requiring transdermal drug delivery.
For related coverage guidance, see recent payer policy updates: Radiofrequency Facet and Sacroiliac Joint Ablation/ Denervation, Facet Joint Injections/ Medial Branch Blocks, Lysis of Epidural Adhesions (Epidural Adhesiolysis).
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National Reimbursement Benchmarks
Nationally, Medicare averages $19.70 for CPT 97033 while BUCA (average commercial) sits materially higher at $43.10, indicating commercial averages are roughly double Medicare for this modality. Blue Cross Blue Shield and Cigna show the highest mean levels among named commercial payers ($51.60 and $50.10 respectively), while Aetna and UnitedHealth Group are lower on average but still above Medicare in many localities.
Dispersion measured as the interquartile difference (P75 minus P25) highlights variation: Blue Cross Blue Shield has the widest IQR at $24.60 ( $60.90 - $36.30 ), and Cigna follows with an IQR of $53.80 ( $74.90 - $21.10 ). UnitedHealth Group’s IQR is $10.40 ( $29.60 - $19.20 ), Aetna’s is $5.70 ( $19.70 - $14.00 ), and BUCA’s IQR is $26.50 ( $52.50 - $28.50 ). Medicare’s IQR is narrow at $1.00 ( $20 - $19 ).