The insurer made the announcement when it reported an expected 20 per cent jump in headline full-year earnings on Wednesday.
ABIL was rescued in a 1.6 billion US dollar bailout led by the central bank last month after being hit by waves of bad debt as its core market of low-income borrowers failed to pay back loans.
"Discovery is only effected through indirect money market and equity unit trust investments and the exposure for shareholders and policy holders is immaterial," South Africa's largest health insurer said in its earnings report.
[DATA DSY:Discovery] said diluted normalised headline earnings increased to 595 cents a share for the year ended June from 496 cents a year earlier. Discovery had already flagged normalised headline earnings would rise by as much as 25 per cent.
The company wrote new business worth 12.2 billion rand (1.14 billion US dollars), up 15 per cent.
Discovery's business model gives customers incentives to lead a healthier lifestyle by subsidising gym fees, fruits and vegetables and even refunding fuel costs to good drivers.
Betting on exponential growth for the Asian insurance industry, Discovery has entered China and Singapore, but has largely shunned Africa where incomes are still relatively low.
It also has businesses in the United Kingdom and the United States.
Discovery shares have risen faster than other blue-chip index constituents this year, climbing 18 per cent compared to the Top-40's 11 per cent.