UPDATE 1-Express Scripts CFO Eric Slusser resigns

(Adds details on Anthem contract; analysts' estimates)

Oct 24 (Reuters) - Express Scripts Holding Co on Tuesday said its Chief Financial Officer Eric Slusser has resigned and named James Havel as his successor, effective Oct 25.

The news comes a week after the pharmacy benefit manager's top client and health insurer Anthem Inc decided to launch its own pharmacy business and signed a new contract with drug retailer CVS Health Corp from 2020.

Anthem, which accounted for about 19 percent of Express Scripts' total revenue in the second quarter, sued the pharmacy benefit manager in 2016 over claims of being overcharged by $3 billion annually.

Express Scripts said on Tuesday Slusser is leaving to pursue other opportunities, but would remain with the company through the first quarter of 2018 to ensure a smooth transition.

The company said net profit attributable to Express Scripts rose to $841.7 million, or $1.46 per share, in the third-quarter ended Sept. 30, from $722.9 million, or $1.15 per share, a year earlier.

Excluding items, the company earned $1.90 per share, in line with analysts' expectations, according to Thomson Reuters I/B/E/S.

The pharmacy benefit manager's revenue fell about 3 percent to $24.68 billion, below the analyst average estimate of $25.64 billion.

The company increased the lower end of its full-year adjusted earnings per share forecast by 2 cents to $6.97 and kept the higher end unchanged at $7.05.

(Reporting by Divya Grover in Bengaluru; Editing by Arun Koyyur)