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UnitedHealth did say that some screen shots containing protected health information or personally identifiable information were posted for about a week online on the dark web, which standard browsers can’t access.

The company is still monitoring the internet and dark web and said there has been no addition file publication. It has started to answer questions and a call center. But the company said it won’t be able to offer specifics on the impact to individual data.

The company also is offering free credit monitoring and identity theft protection for people affected by the attack.

UnitedHealth bought Change Healthcare in a roughly $8 billion deal after surviving a challenge from federal regulators. The U.S. Department of Justice to block the deal, arguing that it would hurt competition by putting too much information about health care claims in the hands of one company.

UnitedHealth said in February that a ransomware group had gained access to some of the systems of its Change Healthcare business, which provides technology used to submit and process insurance claims.

The attack disrupted payment and claims processing around the country, stressing doctor’s offices and health care systems.

are already looking into whether protected health information was exposed in the attack.

UnitedHealth said Monday that it was still restoring services disrupted by the attack. It has been focused first on restoring those that affect patient access to care or medication.

The company said both pharmacy services and medical claims were back to near normal levels. It said payment process was back to about 86% of pre-attack levels.

UnitedHealth said last week when it reported that the company has provided more than $6 billion in advance funding and interest-free loans to health care providers affected by the attack.

UnitedHealth took an $872 million hit from from the cyberattack in the first quarter, and company officials said that could grow beyond $1.5 billion for the year.

Minnetonka, Minnesota-based UnitedHealth Group Inc. runs one of the nation’s largest health insurers. It also runs one of the nation’s largest pharmacy benefits management businesses, provides care and offers technology services.

Company slipped nearly $3 to $488.36 in midday trading Tuesday while broader indexes climbed.