April 18 (Reuters) - UnitedHealth Group ( UNH ) said on

Thursday it had resolved an issue that had hampered processing

of batches of medical claims for some customers of its

technology unit, Change Healthcare.

A fix has been implemented and is being monitored to ensure

operability, Change operator Optum, said in a statement, before

confirming the issue was resolved.

A spokesperson for Optum told Reuters the incident may have

affected "a small subset and customers may have already been

communicated", and that the company will provide more

information when it has any.

It was not clear if the latest incident was related to a

widespread hack in February or the resolution process following

the attack.

The company was still working on resuming operations that

were disrupted by the February hack, and on Tuesday said it

expects a hit of up to $1.6 billion this year from the cyber

attack.

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

by Shounak Dasgupta and Shinjini Ganguli)