CPT 97018: Paraffin Wax Therapy (Joint/Limb Application)
Medicare pays $6 and commercial payers pay $26 on average nationally for this procedure.
CPT code 97018 describes paraffin wax therapy, a heat modality where paraffin wax is applied to joints or a limb is dipped in warm wax to provide therapeutic heat; this service type is a physical therapy modality (paraffin bath/application) typically performed in an outpatient rehabilitation clinic or therapy department to ease joint stiffness and assist with pain management and range-of-motion therapy.
For related coverage guidance, see recent payer policy updates: Hip Arthroplasty (partial and total hip replacement), Shoulder Arthroplasty (Total, Partial, Reverse, Revision and Resurfacing), Artificial Lumbar Intervertebral Disc (Lumbar Total Disc Arthroplasty).
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National Reimbursement Benchmarks
Medicare’s mean rate for CPT 97018 is $6.20, substantially lower than BUCA’s average commercial mean of $26.00, highlighting a wide gulf between federal reimbursement and typical commercial pricing. The median for some commercial payers sits notably higher than Medicare’s $6.00 locality standard, underlining that commercial contracts frequently price this code several times above Medicare levels.
Dispersion (P75 minus P25) varies meaningfully: Blue Cross Blue Shield has a range of $30.70 (P75 $43.70 minus P25 $14.40), and Cigna shows a range of $52.30 (P75 $58.70 minus P25 $6.40), both indicating broad variability in commercial contracting. Aetna and UnitedHealth Group are among the tightest, with ranges of $5.20 (Aetna $9.20−$4.00) and $4.30 (UnitedHealth Group $10.10−$5.70) respectively, suggesting more clustered rates within those networks.