Although White-throated Mountain-gem has a relatively small range, and it population size is not known, its current IUCN status is Least Concern (BirdLife International 2016). This mean that this species is not believed to be approaching to the thresholds for Vulnerable neither under the population size criterion nor under range size criterion. In Costa Rica, this species is a fairly common bird in the proper habitat (Garrigues and Dean 2014). In Panama, it is recognized as a common resident in the highlands of western Chiriquí and around Boquete (Ridgely and Gwynne 1989, Angehr and Dean 2010).
Effects of human activity on populations
Since White-throated Mountain-gem is a species particularly associated with montane forest of the highlands, which are highly threatened by exploitation of wood and disturbance for agricultural advance and coffee plantations throughout much of the range of this species (Hamilton et al. 1995), this hummingbird is potentially threatened by human activities. Although this species has been observed occasionally in disturbed habitats such as gardens (Garrigues and Dean 2014), the effects of human activities on its populations are not studied. White-throated Mountain-gem has been classified as not sensitive to human disturbance in San Gerardo de Dota, Cordillera de Talamanca (Price 2006).
The results of a study in Monteverde, Costa Rica, which investigated the invasions of premontane bird species into cloud forest related to an increase in air temperatures, provide evidence of the sensitivity of the highland ecosystems to climate change. This analysis also evaluated and rejected the pressure of habitat destruction at lower elevations as the sole cause of the upslope movement of birds (Pounds et al. 1999). These observations suggest that highlands may be experiencing the dual stresses of changing microclimates and the invasion of species from lower elevations. In light of these observations, the effects of climate change on cloud forests and their unique biodiversity requires additional research.