He was 86 and is survived by his wife, four sons and one daughter.
Nagaland Chief Minister Neiphiu Rio and current Speaker Vikho-o Yhoshu condoled the death of Phom.
In his message, Rio said the former Speaker was a senior statesman who had served the people with commitment.
He said in his death the Nagas have lost a seasoned leader whose absence will be deeply felt by all.
During his long political career, Chenlom contested nine times from Longleng constituency. He won five times and had served as cabinet minister, deputy speaker and speaker.
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