Oct 15 (Reuters) - UnitedHealth Group ( UNH ) reported a

better-than-expected profit for the third quarter on Tuesday,

due to an increase in the number of members served by its

insurance and Optum businesses.

The company posted an adjusted quarterly profit per share of

$7.15, compared with analysts' average estimate of $7, according

to data compiled by LSEG.

(Reporting by Puyaan Singh and Leroy Leo in Bengaluru; Editing

by Shinjini Ganguli)