Wireless Medical Device Compliance: A Global Guide to Testing and Approval

Written by Element's Alex Toohie, this whitepaper covers the testing and approval requirements for wireless medical devices across the EU, UK, US, and Canada. Topics include CE and UKCA marking, FCC and ISED certification, RF exposure assessment, and modular radio approvals.

Wireless Medical Device Compliance: Scope and Key Findings

This whitepaper is written for medical device manufacturers and designers adding wireless functionality to products targeting the US, EU, UK, and Canadian markets. It does not cover medical device approval processes. It covers the additional radio equipment obligations that apply once a device incorporates a transmitter.

The paper covers the EU and UK approach under the Radio Equipment Directive and the Radio Equipment Regulations 2017; FCC and ISED certification for the US and Canada; MIC certification for Japan; modular versus system approvals and where grant conditions invalidate module certifications in medical device integrations; RF exposure and SAR assessment for body-worn and implantable devices; wireless coexistence under ANSI C63.27; and test readiness planning.

Three findings apply across all markets.

• Modular radio approvals reduce the certification administration burden but do not reduce the testing burden; host-level testing is expected regardless of module certification status.
• RF exposure assessment for body-worn devices is consistently the longest item on a multi-market compliance schedule, and the averaging mass differences between FCC and EU limits mean results do not transfer between markets.
• Manufacturers who address these decisions at design stage avoid the delays, redesigns, and costs that late-stage discovery creates.
  
  

What changes when your medical device goes wireless

Bluetooth, Wi-Fi, cellular, RFID, NFC, GNSS, and wireless power transfer are now standard features across laboratory equipment, portable diagnostics, wearables, implantables, and hospital consumables. The moment you add any of these functions, the product is treated as radio equipment under most regulatory frameworks, and a second set of obligations applies alongside your existing medical device approvals.

Adding wireless functionality brings four new technical questions into scope for your wireless medical device compliance program:

• Whether the radio operates cleanly within its permitted frequency band;
• Whether it interferes with other electronics;
• Whether it causes unacceptable RF exposure to the user; and,
• Whether it continues to function correctly in the presence of other wireless signals.

Each has its own test methods, standards, and regional requirements, and each can affect your route to market.

 

EU wireless medical device compliance: RED and UKCA marking

In the EU, wireless medical devices fall under the Radio Equipment Directive (RED)¹, which applies alongside the Medical Devices Regulation (MDR) or In Vitro Diagnostic Medical Devices Regulation (IVDR). RED’s essential requirements are set out in Article 3. Articles 3.1 (safety and EMC) and 3.2 (spectrum use) form the main focus for most wireless medical devices. Cybersecurity obligations under Articles 3.3(d), 3.3(e), and 3.3(f) do not apply where MDR or IVDR already regulates the equipment.

There is no certification process for CE marking. You draw up and sign a Declaration of Conformity (DoC), taking legal responsibility for the finished product’s compliance. The manufacturer under RED is the party whose name appears on the product. If you integrate a third-party radio module and brand the host product yourself, you become the manufacturer and must sign the DoC for the complete product, including all radio aspects.

The conformity assessment route determines whether you can self-declare or must involve a notified body. For Articles 3.1 and 3.4, Module A self-declaration is available. For Article 3.2, Module A applies only where a harmonized standard is applied in full. Where it is not, notified body involvement via Module B or Module H is required.

Before selecting test standards, you must complete and document a compliance risk assessment. This records which hazards you identified, which standards you selected, how the product was operated during testing, and how you reached the decision to apply CE marking. Every untested mode or operating condition carries risk. The risk assessment is where you make those decisions visible and defensible to market surveillance authorities.

The UK’s Radio Equipment Regulations 2017² closely mirror RED. The UK continues to accept CE marking for radio equipment, so most products do not require a separate UKCA DoC. Where differences exist, such as spectrum allocations for certain frequency bands, you need both. Post-Brexit changes to RED, including Articles 3.3(d), 3.3(e), and 3.3(f) on cybersecurity, have not been transposed into UK law and do not form part of UKCA requirements. The UK government’s position on UKCA and CE marking alignment is subject to ongoing review; verify current guidance before finalizing your compliance documentation.

 

FCC certification for wireless medical devices in the US

The FCC regulates radio emissions of electronic devices in the US under Title 47 of the Code of Federal Regulations³. Every transmitter sold into the US requires FCC authorization, issued by a Telecommunications Certification Body (TCB). Unlike the EU self-declaration route, FCC certification always requires physical test evidence from an FCC-listed laboratory. There is no route to certification without it.

FCC authorization takes one of two forms. System approval certifies the complete device, including the antenna, enclosure, radio, power supply, and electronics. Any change to the product requires going through the process again. Modular approval certifies a transmitter radio module as a standalone unit, allowing it to be integrated into multiple host products under one certification, subject to conditions. The FCC distinguishes between single modular approval and limited modular approval. Single modular approval requires the module to meet all criteria in FCC KDB 996369 D04: shielded RF circuitry, buffered data inputs, its own power supply regulation, tested standalone antennas, and standalone testing. Where only some criteria are met, limited modular approval restricts the module to specific host environments where the unmet conditions are satisfied.

Every FCC-approved transmitter carries a Grant of Equipment Authorization. Check the Grant before integrating any module into your design. Grants often include conditions: no co-location with other transmitters, minimum 20 cm separation from the body, or use of specific antennas only. Breaking any condition invalidates the certification. This is where wireless medical device manufacturers most commonly run into problems, because body-worn use is frequently the intended application and a 20 cm separation condition makes that impossible without additional RF exposure assessment.

“In practice, the most common point of failure we see in wireless medical device projects is a module grant condition that was never checked at selection stage. A module approved for use at 20 cm from the body gets specified into a wearable glucose monitor or ECG patch, and the incompatibility only surfaces when the host integration review is done. At that point you are either retesting for RF exposure, replacing the module, or redesigning the antenna placement. Any of those options adds weeks. Reading the Grant of Equipment Authorization before finalizing the module selection costs nothing.”

Alex Toohie, Technical Solutions Manager, Connected Technologies, Element

When a product changes after certification, the FCC’s Permissive Change process applies. Class I changes do not degrade certified characteristics and the manufacturer handles them with no update to the certificate. Class II and Class III changes degrade certified characteristics or modify a software-defined radio and require TCB involvement and a certificate update. Managing these classifications throughout a product’s lifecycle is an ongoing compliance obligation. For a full breakdown of FCC certification requirements, visit our FCC certification page.

 

ISED certification for wireless medical devices in Canada

ISED regulates radio emissions in Canada under the Radiocommunication Act⁴. The ISED process closely mirrors FCC, but one procedural difference affects launch timing: a product is not market-approved until ISED has accepted the submission and listed the device on its public Radio Equipment List (REL). That REL listing step is a separate schedule item. Manufacturers planning simultaneous US and Canadian launches must account for it explicitly or risk a delayed Canadian market entry.

ISED allows modular approvals on similar terms to the FCC, with one important additional restriction. For handheld, wearable, or small devices with a maximum dimension under 20 cm, host certification is always required when the product contains more than one transmitter, regardless of whether those modules already hold portable-use approval. This directly affects many wireless medical device designs.

ISED’s Permissive Change classes differ slightly from the FCC. Class IV specifically covers new host products for certified modules and requires ISED or Certification Body involvement. Unlike the FCC, ISED certification rules are contained in Radio Standards Specifications (RSS) documents that change regularly. When any applicable RSS is updated, you must re-assess your product to the latest version, which may require new testing. In this respect, Canada resembles the EU: each individual product must comply at the point it is placed on the market.

Japan: MIC certification under the Japan Radio Law

Japan requires separate radio approval under the Radio Law, administered by the Ministry of Internal Affairs and Communications (MIC)⁵. Technical standards for Japan do not map directly to ETSI or FCC standards. Some radio technologies, particularly in sub-GHz ISM bands, have Japan-specific channel plans or power limits. Element is a Registered Certification Body (RCB) for MIC, enabling Japanese certification to run through the same engagement as other markets. For wireless medical devices targeting simultaneous global launch, plan Japan’s radio approval timeline in parallel with your FCC and RED programs, not sequentially after them.

 

Pre-certified radio modules: what wireless medical device approvals transfer and what do not

Many manufacturers integrate an off-the-shelf Wi-Fi, Bluetooth, or cellular module rather than designing a radio from scratch. Under FCC and ISED, modular approvals may carry forward to your host product, but only when every grant condition is preserved. Host-level testing is still expected regardless of the module’s certification status. A module tested standalone in a lab, without your PCB layout, enclosure materials, display cables, or battery packs, cannot be assumed to perform identically in your finished product. Harmonic and spurious emissions are particularly sensitive to host integration.

Under CE and UKCA marking, there is no legal concept of modular approval. RED applies in full to the finished product, and you as the finished-product manufacturer hold complete compliance responsibility. A module supplier’s Declaration of Conformity covers only the module in its own configuration. Module test reports are still valuable under ETSI Guide EG 203 367 as baseline evidence for your Article 3.2 assessment, but they do not remove your obligation to assess and document the finished product’s compliance. Read our guide to using pre-certified radio modules in medical devices for a full breakdown of each market’s position.

 

RF exposure, wireless coexistence, and test readiness for wireless medical devices

 

SAR and RF exposure

For wearable and implantable wireless medical devices, Specific Absorption Rate (SAR) assessment is often the most time-consuming part of a multi-market compliance program. FCC limits of 1.6 W/kg averaged over 1 gram and ICNIRP-derived EU limits of 2.0 W/kg averaged over 10 grams differ in averaging mass, which means results do not transfer between markets automatically and tests are run differently. Antenna design, transmit power, and body-contact assumptions are all design decisions with direct SAR implications. Make these decisions before design freeze, not after. Element is one of very few labs globally to offer ASCA-accredited safety testing for medical devices alongside SAR testing under the same roof.

“SAR testing for a body-worn device targeting both the US and EU is rarely a parallel exercise. The FCC limit of 1.6 W/kg averaged over 1 gram and the ICNIRP-derived EU limit of 2.0 W/kg averaged over 10 grams require different test setups, different phantom configurations, and produce results that cannot be directly compared. Manufacturers who assume that passing in one market means passing in the other consistently find that the second market test adds weeks to the program. Scoping both assessments from the start, with antenna design and transmit power fixed before either test begins, is the only reliable way to avoid that delay.”

Alex Toohie, Technical Solutions Manager, Connected Technologies, Element

Wireless coexistence

The FDA expects wireless coexistence testing for devices where the wireless link is essential to clinical function⁶. The relevant standard is ANSI C63.27, supported by AAMI TIR69 for risk management. Standard EMC immunity testing does not address coexistence because it uses continuous-wave interferers rather than the modulated signals your device will encounter in real hospital environments. Coexistence testing should be scoped during design, not treated as a final verification step.

Test readiness

Having transmit and idle modes, conducted test fixtures, companion devices, receiver performance indicators, and ETSI declaration forms ready before your sample arrives at the lab is consistently the most controllable factor in a wireless medical device compliance program’s schedule. Labs charge for time, and an unprepared sample costs more than a prepared one. Assess test readiness at design freeze, not at sample submission.

 

A planning framework for wireless medical device compliance

Wireless medical device compliance is managed most efficiently when treated as a product-level decision from early design rather than a component-level check late in development. The choice of radio technology, module, antenna design, and intended use distance all shape which test routes apply, which approvals carry forward, and how long the full program takes.

A practical planning sequence for most wireless medical devices:

1. Determine all target markets and the applicable radio approval framework for each.
2. Identify the relevant medical device regulation alongside each radio framework and confirm how they interact.
3. Confirm which conformity assessment route applies, self-declaration or third-party certification, and plan evidence accordingly.
4. Address SAR and coexistence requirements based on the device’s form factor and intended use distance.
5. Assess test readiness at design freeze, not at sample submission.
   
   

References

1. European Parliament and Council. Directive 2014/53/EU on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment (Radio Equipment Directive). Official Journal of the European Union, 2014. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014L0053
2. UK Government. The Radio Equipment Regulations 2017, SI 2017/1206. https://www.legislation.gov.uk/uksi/2017/1206/contents
3. Federal Communications Commission. Title 47 Code of Federal Regulations. https://www.ecfr.gov/current/title-47
4. Government of Canada. Radiocommunication Act, RSC 1985, c R-2. https://laws-lois.justice.gc.ca/eng/acts/R-2/
5. Ministry of Internal Affairs and Communications, Japan. Radio Law. https://www.soumu.go.jp/main_sosiki/joho_tsusin/eng/Releases/Telecommunications/
6. US Food and Drug Administration. Radio Frequency Wireless Technology in Medical Devices: Guidance for Industry and FDA Staff. 2013. https://www.fda.gov/media/71975/download

 

Wireless medical device compliance requires meeting two regulatory frameworks simultaneously. Your medical device approvals do not satisfy your radio equipment obligations. The approval processes, timelines, and evidence requirements differ by region. Manufacturers who treat wireless compliance as a late-stage check consistently encounter delays, redesigns, and unexpected costs that earlier planning would have prevented.

Three findings apply across every market covered in this whitepaper. The approval routes differ significantly between Europe and North America, so planning them sequentially rather than in parallel is the most common cause of delayed launches. Modular radio approvals reduce certification administration but do not reduce testing. And for body-worn devices, RF exposure assessment is almost always the longest item on the schedule because FCC and EU limits use different averaging masses and tests cannot be shared between the two. Addressing these three areas at design stage, before sample submission, is consistently where manufacturers save the most time and cost. For further reading, see our guides on IEC 60601 medical device compliance and accelerating FDA approval with the ASCA program.

To learn more, visit our wireless medical device testing page, our FCC certification page, or speak to our experts.

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