HNS Policy 

Constant attendance modality codes are used to report various physical agents applied to the patient for the purpose of producing therapeutic changes to biological tissue. The services described by these codes require direct one-on-one contact by the provider. Throughout the procedure, the provider is required to maintain visual, verbal, and/or manual contact with the patient.


Constant attendance therapies are time-based and billed in 15-minute increments. Only the actual time of the provider's direct contact with the patient providing these services count toward total time. (If a time-based code is provided for less than 8 minutes, the service should not be billed to the payor.)


Examples of commonly reported constant attendance therapies are 'attended' electrical stimulation (CPT 97032) and ultrasound (CPT 97035).


For important information regarding requirements for reporting these services, please click on the applicable link below:


Electrical Stimulation - Attended (CPT Code 97032)

Ultrasound (CPT Code 97035)


HNS Policies: Documentation/Billing
When performed and billed to a payor, modalities/therapies must be properly documented in the health care record and accurately reported using the most appropriate code.


When performed and billed to a payor, modalities/therapies must be medically necessary and consistent with the chief complaint/clinical findings, diagnoses and treatment plan.


Documentation in the health care record must include the rationale for each therapy and must clearly establish the medical necessity for each therapy billed to the payor.


For ALL modalities and therapies, documentation must include:

  • Type of modality


  • Rationale


  • Area of application (specific region treated)


  • Setting and frequency (as applicable)


  • If time based code, actual time service performed


During the initial phase of care, no more than two therapies or modalities per visit are considered usual and customary.


There should be a reduction in the use of therapies as the patient's condition improves.


Note on unlisted modality codes: As a general rule, should not be billed through HNS (including, but not limited to, 97039, 97139, 97799 and 20999). If you need assistance with determining the appropriate code for a particular service, please contact your HNS Service Representative.