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CPT 97113: Aquatic Therapeutic Exercises, 15 Minutes
CPT code 97113 covers supervised aquatic therapeutic exercises provided in a pool setting for 15-minute intervals. Aquatic therapy is used for mobility, strength, pain management, and functional recovery when land-based exercise is limited by pain, weight-bearing restrictions, or balance issues. Nationally, this code represents a distinct modality within outpatient rehabilitation and physical therapy programs, with implications for coding accuracy, bundling with water-based modalities, and coverage determinations.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, and Medicare. Readers will find a concise overview of clinical intent and service setting, comparisons to related therapy procedure codes, common billing interactions that affect reimbursement (such as mutually exclusive or non-billable combinations), and typical diagnostic contexts where aquatic therapy is billed. The publication also summarizes frequently observed payer policy themes relevant to coverage and medical necessity determinations for aquatic therapeutic exercises.
The content is intended to help coding professionals, revenue cycle managers, and compliance staff understand the clinical definition, coding relationships, and payer considerations for CPT code 97113 in a national context.
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Billing Code Overview
CPT code 97113 describes the provider-directed instruction and supervision of aquatic therapeutic exercises for one or more areas of the body for a 15-minute interval. This service typically involves structured exercise activities performed in a water environment under the direct oversight of a qualified rehabilitation clinician.
Service type: Aquatic therapeutic exercise (supervised, 15 minutes)
Typical site of service: Pool or aquatic therapy facility
National Reimbursement Benchmarks
National averages place Blue Cross Blue Shield and Cigna well above Medicare and near BUCA’s commercial average: BUCA’s mean is $65.9 while Medicare’s mean is $38.4, a gap of $27.5 favoring commercial levels. This positions Medicare toward the lower end of the national spectrum and BUCA near the mid-to-upper commercial range.
Dispersion varies notably across payers. Blue Cross Blue Shield shows the widest interquartile spread at $34.0 (P75 $92.0 minus P25 $58.0), followed by Cigna at $45.0 (P75 $82.9 minus P25 $40.4) and UnitedHealth Group at $13.8 (P75 $49.7 minus P25 $33.9). Aetna’s IQR is $23.7 and BUCA’s IQR is $34.2; Medicare’s IQR is narrow at $4.0, indicating the tightest clustering around its mean.