Bangladesh, Bhutan, China (mainland), India, Laos, Myanmar, Nepal, Thailand, Vietnam.
Himalayas from northern India (eastern Uttaranchal) and northern Nepal eastern discontinuously to Arunachal Pradesh, Nagaland and Manipur, north-eastern Bangladesh, western and eastern Myanmar and southern China (western and south-western Sichuan south to western and north-western Yunnan). Non-breeding also south to northern Thailand, northern Laos and extreme northern Vietnam.
 
Population
Estimated population is unknown (2010).
Yellow-bellied Flowerpecker (Dicaeum melanozanthum) [XC437568]
by id from South of Zhongdian, China (call)
Yellow-bellied Flowerpecker (Dicaeum melanozanthum) [XC328321]
by Thijs Fijen from Tambon Ban Luang, Amphoe Chom Thong, Chang Wat Chiang Mai, Thailand (call)
Subspecies
No subspecies.
The only member of its genus possessing a visible outermost primary, which is the character state in Prionochilus, but was placed in present genus owing to superficial resemblance to White-throated Flowerpecker (Dicaeum vincens). However, in tongue morphology resembles Red-keeled Flowerpecker (Dicaeum australe) and Buzzing Flowerpecker (Dicaeum hypoleucum), and not Prionochilus.