While affirming that an FCC proposal to allocate 413-457 MHz spectrum for medical devices that could help restore mobility to patients with paralyzed limbs is well-intentioned, public safety, amateur and other licensees adjacent to that frequency band warned that the plan could result in harmful interference not only to their operations but also to the medical devices, thus putting patients at risk. Comments from these parties were filed with the FCC this week in response to a rulemaking notice that was issued last March in tandem with a Report and Order establishing rules for a new MedRadio service in the 400 MHz band. In response to a 2007 petition filed by the Alfred Mann Foundation (AMF), the FCC has proposed a secondary allocation of frequencies in four segments—413-419 MHz, 426-432 MHz, 438-444 MHz, and 451-457 MHz—that would support implanted neuromuscular microstimulation devices that would operate as part of medical micropower networks (MMNs). Taking issue with the proposed allocation in the 451-457 MHz band, which “is heavily used throughout the nation by public safety and other entities,” the Association of Public Safety Communications Officials (APSCO) told the FCC that “individuals with implanted . . . devices are likely to be in very close physical proximity at various times to portable radios being used in these frequency bands” by emergency first responders. While warning of potential interference to these medical devices, APSCO recommended “further study . . . to ensure that the proposed medical devices do not interfere with portable or mobile radios used by public safety entities.” Voicing similar concerns, the Land Mobile Communications Council (LMCC) noted that the 451-457 MHz band “is perhaps one of the most intensely used segments of the UHF band,” which is “used on a daily basis for a wide variety of high power voice and data operations.” Thus, LMCC stressed: “given the predicted variety of serious medical problems that would be improved using these implanted devices . . . it could be disastrous if an implanted device was to malfunction as a result of the presence of another medical radio signal.” While various other parties urged consideration of other frequency bands for these devices, AMF defended the proposed 413-457 MHz allocation as “ideally suited for MNN operation,” as it “falls within the range of spectrum widely viewed as most suitable for radiofrequency signal propagation within the human body.” AMF also sought to allay fears about interference, adding that the implanted devices “will employ sophisticated techniques to mitigate harmful interference from incumbent systems.”