CPT® Code 97014

Last Updated: January 2026 | Verified for 2026 AMA, CPT & CMS Guidelines

Quick Reference: What to Know in 60 Seconds

• What 97014 represents: Unattended electrical stimulation applied to one or more areas as a supervised (not constant-attendance) modality. It is generally an untimed, per-visit service and is not billed in 15-minute increments.
• Medicare rule: Medicare does not recognize CPT 97014 for payment. For Medicare outpatient therapy, bill HCPCS G0283 for unattended e-stim provided as part of a therapy plan of care . Medicare coding articles explicitly instruct providers to use G0283 instead of 97014 .
• Attended vs unattended: Use attended e-stim (97032) only when constant one-on-one skilled attendance is required. Medicare guidance emphasizes that “watching for safety” alone does not convert unattended stimulation into attended stimulation .
• Setting matters: Facility vs non-facility reimbursement and billing mechanics differ. Place of Service (POS) and who bills (clinic vs hospital) must match where the service occurred .
• Modifiers drive payment: Therapy discipline modifiers (GP/GO/GN) are required when therapy rules apply . Use KX when costs exceed the annual therapy threshold and documentation supports continued medical necessity . Use 59 (or appropriate X-modifiers) only when documentation supports a distinct service under NCCI edits . Unattended electrical stimulation is one of the most common physical medicine modalities, but it is also one of the easiest services to bill incorrectly—primarily because Medicare uses a different code than commercial payers, and because “attended vs unattended” is frequently misunderstood. This 2026 guide explains how to code and document unattended e-stim correctly in typical outpatient rehabilitation workflows, with special focus on Medicare’s requirements for HCPCS G0283, therapy modifiers, facility vs non-facility billing differences, and National Correct Coding Initiative (NCCI) edit compliance.

1. Clinical Definition and Scope

CPT 97014 is described as unattended electrical stimulation applied to one or more areas as a supervised modality. In plain clinical terms, the clinician positions electrodes (typically surface pads), selects the appropriate waveform and parameters, confirms tolerance and safety, and then the patient receives stimulation while the clinician is available on-site and checks periodically. The defining feature is that the clinician is not in constant one-on-one attendance for the full duration.

Unattended e-stim is commonly used for pain modulation, spasm reduction, and edema management, and it may also be used as an adjunct to muscle activation strategies when delivered in a non-constant-attendance format. From a coding standpoint, the key idea is that 97014 represents a supervised modality rather than a time-based therapeutic procedure. That distinction matters because many outpatient therapy services are timed, but unattended e-stim is generally reported as one unit per visit (even when the clinic’s internal protocol uses a defined minute range).

Another important scope concept is “one or more areas.” The code is not inherently “per body part.” If stimulation is applied to multiple anatomic regions during the same treatment visit, payers typically still expect a single unit, because the code descriptor is not set up as separate chargeable units by region. The operational compliance approach is therefore: treat multiple pads/areas as a single supervised modality service unless payer policy explicitly instructs otherwise.

Finally, do not expand the scope of 97014 to include types of stimulation that have separate Medicare policies or distinct code pathways. For example, Medicare has explicit instructions about outpatient therapy services and how specific modalities are coded and covered; when Medicare policy points to a different HCPCS code, it is a strong signal that 97014 is not the correct Medicare reporting vehicle . In short: define the service accurately as unattended stimulation in a supervised therapy context, and then align the claim to the payer’s code set and rules.

Compliance hinge: “Unattended” is not about whether the patient is alone. It is about whether the service requires continuous, constant one-on-one skilled attendance. Medicare guidance distinguishes supervised modalities from constant-attendance modalities and cautions against billing attended stimulation when the clinical service is essentially electrode-based stimulation delivered without constant attendance .

2. Medicare Guidelines and G0283 Conversion

For Medicare beneficiaries receiving outpatient therapy, CPT 97014 is not the correct payable code. Medicare instructs providers to report unattended electrical stimulation with HCPCS G0283 as part of a therapy plan of care . Medicare’s billing and coding article for outpatient therapy services is explicit about code usage and provides the operational foundation for claim construction (including which codes are recognized, and how they must be reported) .

Practical rule: If the payer is Medicare Part B (or a payer that follows Medicare coding conventions), do not submit CPT 97014 expecting payment. Submit G0283 when unattended stimulation is provided under a therapy plan of care and the service is reasonable and necessary for the patient’s goals . This avoids the frequent denial pattern in which 97014 is treated as non-payable or invalid under Medicare’s fee schedule logic.

“As part of a therapy plan of care” means documentation must exist

Medicare’s descriptor for G0283 includes the phrase “as part of a therapy plan of care.” Operationally, that means the service should be tied to an established plan with measurable functional goals, and delivered within the structure of outpatient therapy coverage rules. Medicare’s Claims Processing Manual outlines therapy billing requirements and reinforces the importance of therapy plan-of-care and modifier conventions for outpatient rehab services .

Threshold (cap) mechanics also apply

Because G0283 is billed under therapy rules, it is counted toward the annual therapy threshold. When allowed amounts exceed the published threshold, continued payment requires the KX modifier as the provider attestation that documentation supports ongoing medical necessity. Medicare thresholds and KX mechanics are explained in Medicare contractor guidance and professional association resources . Clinics should incorporate an internal workflow that flags patients approaching the threshold and confirms that progress notes and recertifications are up to date before KX is appended.

3. Billing Rules by Setting (Facility vs Non-Facility)

Unattended stimulation is a good example of why “where the service occurred” matters. The clinical service might look identical to the patient, but billing and payment differ between facility and non-facility settings. “Facility vs non-facility” affects which entity submits the claim, which schedule is used for reimbursement, and how overhead costs are accounted for in payment .

Non-facility (private practice clinic) billing

In a private practice therapy clinic, the clinician or group typically bills on a professional claim. The payment logic includes a practice expense component that reflects the clinic’s overhead—equipment, staff time, supplies—because the clinic is bearing those costs directly. Guidance on facility vs non-facility payment under the Physician Fee Schedule explains why the same service can reimburse differently depending on setting .

Facility billing (hospital outpatient department, institutional clinics)

In hospital outpatient therapy departments, the hospital generally submits the institutional claim and receives payment under the outpatient prospective payment system structure. The clinician may be salaried rather than paid per code. The key compliance risk here is not the clinician’s salary model, but ensuring the hospital’s claim includes the correct therapy indicators, discipline modifiers, and documentation, because Medicare coverage rules still apply to outpatient therapy services even when billed by a facility .

Place of Service accuracy

Incorrect POS is a common operational cause of “wrong rate” payment or denial. A clinic demonstrate compliance by matching the billing entity and POS to where the service occurred and by maintaining documentation that supports the setting (orders, plan of care, and attendance logs). Because facility vs non-facility payment distinctions are embedded in payer systems, mismatches can trigger underpayment, overpayment, or recoupment during audit .

4. Modifier Usage and NCCI Edits

Unattended stimulation claims are frequently denied not because the modality is never covered, but because the claim lacks required modifiers or because a payer’s edit logic interprets the service as bundled. In outpatient therapy billing, the three most important modifier concepts for this service are: (1) therapy discipline modifiers (GP/GO/GN), (2) KX threshold modifier, and (3) NCCI modifiers (59 or X-modifiers) when truly distinct services are provided.

Therapy discipline modifiers (GP/GO/GN)

Medicare requires therapy modifiers on outpatient therapy services to identify the discipline under which the service was delivered and to route the claim through the correct coverage logic. The Medicare Claims Processing Manual specifies therapy modifier requirements and confirms they are used in addition to other modifiers such as KX . In practical claim construction, G0283 should usually carry the appropriate therapy modifier (often GP), because unattended e-stim is typically provided as part of a PT or OT plan of care.

KX modifier once the therapy threshold is exceeded

KX is not a “routine always” modifier; it is a specific attestation that therapy beyond the annual threshold remains medically necessary and supported by documentation. Medicare contractor and professional association resources track current therapy threshold amounts and explain when KX is required to prevent automatic denials . Clinics should treat KX as a documentation checkpoint: when appended, the record should clearly justify why the patient still needs skilled therapy and what measurable progress or clinically appropriate maintenance rationale exists.

NCCI edits and modifier 59 (or X-modifiers)

NCCI procedure-to-procedure edits can bundle a modality into another billed service when the payer assumes overlap in the same session and region. The central rule is that modifiers can only be used to override edits when the services are truly distinct (separate structure, separate encounter, or unusual non-overlap) and documentation supports that distinctness. CMS’s NCCI Policy Manual provides the overarching framework for correct coding and outlines restrictions on certain uses of electrical stimulation in specific clinical contexts .

When an NCCI edit is present and the modifier indicator allows an override, modifier 59 (or the more specific X modifiers, if recognized by the payer) may be appropriate only when the modality is distinct from the other procedure by anatomic region or encounter. APTA’s education on NCCI edits provides practical therapy-facing examples of code pairing issues and emphasizes that without the appropriate modifier, the column 2 code is typically denied .

Audit pattern to avoid: Routine, “always-on” modifier 59 usage is a classic red flag. The defensible approach is to use 59 (or XS/XE/XU) only when you can point to specific note elements proving separate body region, separate time/encounter, or unusual non-overlap consistent with NCCI principles .

5. Documentation and Medical Necessity Standards

From a payer perspective, unattended stimulation is a low-value, frequently used modality that can become non-covered if used without measurable benefit or if documentation is generic. The goal is to document the service as a clinically integrated, goal-directed intervention that supports functional improvement or an appropriate skilled plan. Medicare’s outpatient therapy billing and coding guidance provides the overarching expectation that services must be reasonable and necessary and properly documented .

Plan of care linkage

Documentation should start with the evaluation and plan of care. The plan should identify why stimulation is needed (pain modulation to allow exercise participation, edema reduction to improve ROM, spasm reduction to enable gait training), how often it will be used, and how it connects to functional goals. This is not just good clinical practice; it is how you show that the modality is not an isolated “comfort service,” but part of a medically necessary therapy program.

Daily note essentials (what auditors want to see)

• Modality type: TENS, IFC, NMES/Russian, high-voltage pulsed, etc.
• Anatomic location: where electrodes were placed and which region was treated.
• Parameters and tolerance: enough detail to demonstrate skilled setup and safe administration.
• Duration: even though the code is not timed, duration supports clinical coherence and helps reconcile total visit flow.
• Patient response: pain rating change, swelling measures, ROM, spasm reduction, or functional tolerance improvements.
• Connection to function: note how the modality supports participation in active therapy (exercise, gait training, ADLs). When KX is used, documentation should be particularly clear about progress or ongoing need. Medicare’s therapy threshold resources describe KX as an attestation tied to documentation; that means records should substantiate the reason for continued skilled therapy beyond the threshold .

Attended vs unattended documentation

The single most important documentation decision is whether the service is truly unattended (supervised) or truly attended (constant attendance). Medicare’s outpatient therapy coding guidance explicitly discusses the distinction and warns against billing attended codes merely because the clinician remained nearby for safety while a typical electrode-based modality ran . If you bill 97032, notes should explain why constant one-on-one skilled attendance was required—manual adjustments throughout, continuous instruction, probe use, or other direct skilled involvement.

6. Code Comparison Table: 97014 vs 97032 vs G0283

7. Real-World Clinical Scenarios

Scenario A: Postoperative knee pain and edema (Medicare outpatient PT)

Clinical picture: A Medicare patient after total knee arthroplasty has edema and pain limiting participation in therapeutic exercise.

Service: Therapist provides therapeutic exercise and then applies unattended electrical stimulation (e.g., high-voltage pulsed) for edema/pain control while supervising in the clinic.

Coding approach: Bill therapeutic exercise as timed units and bill G0283 (not 97014) for unattended stimulation, appending the appropriate therapy modifier per Medicare rules . If the annual threshold is exceeded, append KX to applicable lines consistent with threshold guidance .

Documentation focus: electrode placement around the knee, patient tolerance, pre/post pain rating, edema measures or functional effect (e.g., improved exercise tolerance). Tie modality to functional goals and plan of care per Medicare outpatient therapy guidance .

Scenario B: Chronic low back pain with transition plan

Clinical picture: Outpatient therapy patient receives TENS/IFC at end of visit primarily for pain modulation to support exercise participation.

Service: Unattended stimulation delivered as a supervised modality while the therapist remains on-site.

Coding approach: Use G0283 for Medicare therapy. Keep the service “unattended” unless the clinician truly provides constant one-on-one skilled attendance meeting attended criteria; Medicare guidance emphasizes not selecting attended codes solely for monitoring .

Documentation focus: describe how stimulation enabled functional exercise participation and note progression/transition plan (e.g., training on home strategies). When any NCCI edit conflict is suspected with other same-day services, apply modifier logic only when services are distinct and documentation supports separation consistent with NCCI principles .

Scenario C: When attended e-stim is actually correct

Clinical picture: A patient requires constant skilled attendance for electrical stimulation because stimulation must be continuously adjusted during a task-specific training activity.

Service: Clinician remains one-on-one throughout, providing continuous instruction, adjustment, and direct skilled involvement.

Coding approach: Bill attended stimulation (97032) in timed units, ensuring documentation supports constant attendance. Medicare’s outpatient therapy billing guidance highlights the conceptual boundary between electrode-based supervised modalities and truly attended services .

Documentation focus: describe why constant attendance was required and how the clinician’s continuous involvement affected the outcome (not merely safety observation).

Scenario D: Facility vs non-facility claim mechanics

Clinical picture: Same modality performed in two different settings: a private practice clinic vs a hospital outpatient therapy department.

Coding approach: Ensure the claim entity and POS match the setting. Facility vs non-facility payment rules differ because overhead is assigned differently, and the payer’s system will price the service accordingly .

Documentation focus: maintain consistent plan-of-care and daily note standards; outpatient therapy documentation expectations apply regardless of whether the claim is institutional or professional .