Heating Devices (DME)
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This policy describes Aetna's coverage stance for heating devices as durable medical equipment (DME), specifying which heating devices are considered medically necessary, which are unproven or experimental, and which are excluded from home DME coverage. It applies to Aetna members and providers submitting DME requests.
No material clinical or coverage changes in this revision.
Coverage Criteria for Heating Devices (DME)
Medically necessary heating devices
Covered when ALL of the following are met
Standard (non‑portable) paraffin baths are not appropriate for home use.
Medical review required for multiple devices.
Experimental / Unproven / Not established
Not covered / Unproven / Experimental
Replacement pumps and pads for such systems are also not reasonable and necessary.
See CPB 0604 - Infrared Therapy.
Limited evidence (small case series) exists; clinical justification and objective vascular data preferred if considered.
Exclusions / Not DME
Excluded from home DME
These modalities require trained attendants and supervised clinic settings.
Coverage considerations by device type
Policy descriptions and clinical guidance summarized from background and appendix
Place of service: clinic/supervised therapy setting.
Provide objective vascular studies (ABI, TcPO2) and clinical notes when seeking coverage.
This policy distinguishes multiple types of heating devices and summarizes coverage stance by device. Standard electric heating pads (HCPCS E0210) and moist electric heating pads (HCPCS E0215) are described with device definitions and are addressed as DME when criteria are met. Portable paraffin baths (HCPCS E0235) are recognized as a superficial heating modality used for contractures and inflammatory/connective tissue conditions and may be covered after a successful trial. In contrast, institutional deep‑heating modalities — including ultrasound diathermy (therapeutic ultrasound), short‑wave diathermy, and microwave diathermy — are not appropriate for unsupervised home use and are excluded from home DME. The policy also lists non‑DME consumer items (e.g., hot water bottles, heat and massage foam cushions, portable room heaters) as not meeting the contractual definition of DME.
The policy lists specific HCPCS/CPT codes that are covered if criteria are met and those that are not covered for the indications in this policy; examples include coverage‑eligible codes such as E0210, E0215, E0235, and non‑covered codes such as E0200, E0205, E0217, E0221, E0225, E0236, E0239, E0249, A9273, K1004, K0136.
Infrared (near‑infrared) heating pad systems are identified as devices that generate infrared light (for example, LED elements) integrated into pads. Per DME MAC guidance cited in the policy, infrared heating pads and related accessories are considered not medically reasonable and necessary because no indications have demonstrated therapeutic effect compared with standard electric heating pads and hot packs. The policy lists the corresponding HCPCS code (E0221) among codes not covered for the indications in this policy.
Deep heating modalities — including ultrasound diathermy (frequencies typically 0.8–1 MHz), short‑wave diathermy, and microwave diathermy — convert energy to heat deep in tissues and are used for tendonitis, bursitis, musculoskeletal pain, degenerative arthritis and contractures. Because of the need for appropriate application technique and attendant supervision and the inherent risks of these modalities, the policy states these devices are inappropriate for unsupervised home use and therefore are not covered as home DME.
The policy notes that water‑circulating heating pads with pump (HCPCS E0217) and their replacement pads/pumps are not established as reasonable and necessary compared with standard electric heating pads per Medicare DME MAC policy; therefore, coverage for the primary device and replacement components is not supported. Similarly, the policy indicates that moist electric heating pads have not been shown to provide superior outcomes to standard electric heating pads and are not established as reasonable and necessary compared to the standard devices.
The policy states that infrared (or near‑infrared) heating pad systems have not been demonstrated to be therapeutically effective and, according to DME MAC policy, are not medically reasonable and necessary compared with electric heating pads and hot packs; these devices and related accessories are therefore treated as non‑covered for the indications in this policy.
Coding and Diagnosis Examples
| 97010 | Application of a modality to one or more areas; hot or cold packs. |
| 97018 | Paraffin bath. |
| 97024 | Diathermy (eg, microwave). |
| 97026 | Infrared. |
| 97035 | Ultrasound, each 15 minutes. |
| A4265 | Paraffin, per lb. |
| E0210 | Electric heat pad, standard. |
| E0215 | Electric heat pad, moist. |
| E0235 | Paraffin bath unit, portable. |
| A9273 | Hot water bottle, ice cap or collar, heat and/or cold wrap, any type. |
| E08.40-E08.49 | Diabetes with neurological manifestations. |
| E08.610 | Diabetes with diabetic neuropathy, unspecified. |
| E09.40-E09.49 | Drug or chemical induced diabetes with neurological manifestations. |
| E09.610 | Diabetes due to drugs with neuropathy. |
| E10.40-E10.49 | Type 1 diabetes with neurological manifestations. |
| E10.610 | Type 1 with neuropathy. |
| E11.40-E11.49 | Type 2 diabetes with neurological manifestations. |
| E11.610 | Type 2 with neuropathy. |
| E13.40-E13.49 | Other specified diabetes with neurological manifestations. |
| E13.610 | Other specified diabetes with neuropathy. |
Provider Actions, Prior Authorization & Denial Triggers
Obtain prior authorization / medical review for heating DME
Submit prior authorization/medical review when requesting DME heating devices if medical necessity is in question, when a prior trial is required (e.g., portable paraffin bath), or when more than one heating device is requested for the same medical condition. Include clinical justification and trial results with the request.
- Usually no more than one heating device is considered medically necessary per medical condition; requests for multiple devices are subject to medical review.
- Paraffin bath portable units require documentation of a successful trial prior to approval.
Prior authorization for home‑use deep heating devices
Obtain prior authorization/medical review before seeking coverage for deep heating devices for home use (ultrasound, short‑wave, microwave diathermy), since these modalities are described as inappropriate for unsupervised home use and may be denied.
- Deep heating modalities require trained attendants and are generally inappropriate for unsupervised home use.
- Prior authorization recommended when requesting home use coverage inconsistent with DME MAC guidance.
Successful trial required for portable paraffin baths
Document and submit evidence of a successful supervised trial of paraffin therapy before requesting coverage for a portable paraffin bath for home use.
- Portable paraffin baths are considered medically necessary only after a successful trial period of paraffin therapy.
- Record the trial duration, clinical response, and expectation of long‑term benefit (e.g., severe rheumatoid arthritis of the hands).
No additional step therapy specified
No specific step‑therapy sequencing beyond the paraffin trial is specified in this policy; do not assume additional step therapy requirements apply unless stated elsewhere.
Medical review: supply supporting clinical documentation
Provide clinical documentation to support medical necessity for heating device requests, especially when multiple devices are requested for the same condition; include prior trial documentation where applicable and identify the specific HCPCS/CPT code requested.
- State the diagnosis and clinical rationale demonstrating expected long‑term benefit.
- Attach documentation of prior conservative measures, trial outcomes, and the specific device code being requested.
Provide ABI, TcPO2 and clinical response data for SAW devices
When requesting coverage for a PainShield MD / SAW device for ischemic feet, supply objective vascular studies (e.g., TcPO2, ABI) and clinical notes documenting prior treatments and clinical response to support medical necessity.
- Rosenblum (2014) used TcPO2 and ABI and reported clinical response; provide similar objective data when available.
- Document prior therapies and any observed symptom or tissue oxygenation response.
Document trial and clinical rationale for paraffin bath requests
Include documentation of a successful trial period and clinical rationale when requesting a portable paraffin bath; failure to document a trial is a basis for denial.
- Record trial method (immersion or repetitive dipping), duration (typically 20–30 minutes per session), and clinical improvement.
- State the diagnosis indicating expected long‑term benefit (e.g., rheumatoid arthritis, hand contractures).
Denial risk: water‑circulating, infrared, replacement parts, and home SAW devices
Do not expect coverage for water‑circulating heating pads/pumps, infrared heating pad systems, replacement pads/pumps for water‑circulating systems, or low‑frequency ultrasonic diathermy devices for home use — these are treated as experimental/unproven or not medically necessary and are likely to be denied.
Excluded equipment — likely denial
Requests for heat lamps, hydrocollator units, hot water bottles, heat‑and‑massage foam cushions, and portable room heaters are excluded (not DME) and will not be covered.
- Hydrocollator units, microwave/short‑wave diathermy, and ultrasound devices are institutional equipment not appropriate for home use and are not covered.
- Heat and massage foam cushion pads, hot water bottles, and portable room heaters do not meet the contractual definition of DME.
Infrared heating pads — high denial risk
Infrared heating pad systems and related accessories are considered not medically reasonable and necessary per DME MAC policy; claims for these items are at high risk for denial.
- Infrared systems have not demonstrated therapeutic effect and are not shown to be more effective than electric heating pads or hot packs.
- Do not submit infrared heating pad systems for coverage as they are considered not medically necessary.
Medical Necessity Criteria and Device-specific Rationale
Equipment-specific necessity
Medical necessity criteria for specific equipment
Must be UL certified and have automatic shut‑off timer per device definitions.
Requires UL certification and water‑containing element separated from electrical components.
Standard (non‑portable) paraffin baths are not appropriate for home use.
DME medical necessity by device
Device-specific clinical rationale drawn from background and appendix
Place of service should be supervised clinic/therapy setting.
Provide ABI/TcPO2 and clinical course when requesting coverage.
Rental, Purchase, and Coverage Status by Device
| Equipment | HCPCS / Code(s) | Rental / Purchase Rule |
|---|---|---|
| Water-circulating heating pad with pump and replacement parts | ||
| E0217 (water circulating heat pad with pump); E0236 (pump for water circulating pad); E0249 (pad for water circulating heat unit, replacement) | ||
| Not covered / not applicable — Medicare DME MAC policy states water‑circulating systems are not reasonable and necessary compared to standard electric heating pads; replacement pumps or pads therefore are not reasonable and necessary. |
| Equipment / Code group | HCPCS Codes listed | Rental / Purchase Rule |
|---|---|---|
| Standard electric and moist electric heating pads; portable paraffin bath (codes shown) | ||
| E0210 (Electric heat pad, standard); E0215 (Electric heat pad, moist); E0235 (Paraffin bath unit, portable) | ||
| Purchase vs rental not specified in this policy text for these codes; coverage contingent on meeting applicable selection criteria. |
| Equipment | HCPCS / CPT | Rental / Purchase Rule |
|---|---|---|
| Paraffin baths (small commercial portable units for home use) | ||
| E0235; CPT 97018; A4265 (paraffin supply) | ||
| Purchase — small commercial paraffin units are available for home use and the policy describes purchase as the rule for paraffin baths when criteria are met (successful trial and expectation of long‑term benefit). |
| Equipment | Examples (HCPCS / CPT) | Rental / Purchase Rule |
|---|---|---|
| Ultrasound diathermy machines (deep heating modalities) | ||
| CPT 97035; HCPCS codes for diathermy generally referenced (e.g., 97024 for diathermy/microwave) | ||
| Not covered for home use — deep heating modalities (ultrasound, short‑wave, microwave diathermy) are inappropriate for unsupervised home use and therefore not considered home DME purchase or rental. |
Definitions of Device Types
Documentation Requirements
Document trial results and clinical rationale for paraffin baths
For portable paraffin baths, include documentation of the successful trial period, the diagnosis indicating likely long‑term benefit (e.g., severe rheumatoid arthritis of the hands), and clinical notes describing expected durable improvement.
- Record trial length, objective and subjective response to paraffin therapy, and clinician assessment that long‑term home use is expected to benefit the condition.
Include clinical justification for multiple‑device requests
When requesting multiple heating devices for the same condition, include explanatory clinical justification and supporting notes for medical review to demonstrate why a single device would be insufficient.
- Attach prior treatment records and rationale distinguishing the need for each device.
Supply objective vascular studies and prior treatment response for SAW
For SAW/PainShield device requests in ischemic extremities, provide objective vascular studies (ABI, TcPO2) and clinical notes documenting prior treatments and patient response to therapy to support medical necessity.
- Provide baseline ABI and TcPO2 values and documentation of any observed improvements during SAW use.
- Include prior vascular and wound care treatment history.
Items Not Covered / Excluded
The policy lists several items as not covered for home DME. Hydrocollator units (hot packs) (e.g., HCPCS E0225, E0239) are institutional devices and are excluded from home DME because use of these modalities must be performed by or under supervision of a qualified physical therapist. Likewise, deep diathermy machines — including microwave diathermy devices and short‑wave diathermy devices — are identified as inappropriate for unsupervised home use and therefore not covered. Ultrasound devices intended for home use are likewise excluded. The policy also identifies consumer items such as heat lamps, hot water bottles, and massage cushion pads as not meeting the contractual definition of DME.
Background and Clinical Context
Therapeutic heating devices are used to relieve pain, reduce joint and soft‑tissue stiffness, relax muscles, and assist in reducing inflammation primarily by increasing local blood flow and metabolic activity. Superficial heating (for example, paraffin baths) is commonly used for hand contractures and inflammatory connective tissue conditions; paraffin baths are typically applied by immersion or repeated dipping at approximately 52–54°C for 20–30 minutes. Standard and moist electric heating pads provide topical heat to the skin; because electric heating pads do not cool spontaneously, use should be limited to 20 minutes to avoid risk of burns. Deep heating modalities (ultrasound, short‑wave, microwave) deliver heat beneath the skin and require trained attendants and appropriate technique, which is why these are considered unsuitable for unsupervised home use. The policy also summarizes that infrared heating pad systems have not been shown to offer therapeutic benefit over electric heating pads and hot packs.
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