UPDATE 1-LabCorp profit beats on strong demand for diagnostic services

(Adds estimates, forecast, unit revenues)

Oct 25 (Reuters) - Laboratory Corp of America Holdings reported a higher-than-expected quarterly profit on Wednesday, and raised its full-year revenue growth forecast, as demand for its diagnostic services increased.

Revenue from its diagnostic services, the company's biggest business, increased 10 percent to $1.84 billion, despite the impact of hurricanes in the quarter, the company said.

LabCorp's Covance unit, which carries out trials for drugmakers, raked in revenue of $761.1 million, an increase of 8.6 percent from a year earlier.

The company raised its full-year forecast for net revenue growth to 8-8.5 percent from 5-6.5 percent.

LabCorp also raised the bottom end of its adjusted earnings forecast range to $9.40 from $9.30, but lowered the top end to $9.60 from $9.65.

Net earnings attributable to LabCorp rose to $180.6 million, or $1.74 per share, in the third quarter ended Sept. 30, from $179.5 million, or $1.71 per share, a year ago.

Net revenue rose 10 percent to $2.66 billion.

The company earned $2.46 per share, excluding items. Analysts on average had estimated earnings per share of $2.40, according to Thomson Reuters I/B/E/S.

(Reporting by Manas Mishra in Bengaluru; Editing by Martina D'Couto)