Abbott headquarters in North Chicago. (January 23, 2013)

9:19 a.m. CST, February 15, 2013

Liberty Medical Supply Inc., which lists Abbott Laboratories as one of its largest creditors, has filed for chapter 11 bankruptcy protection, according to court documents.

Liberty Medical Supply Inc. lists assets and liabilities of between $100 million and $500 million. Abbott Laboratories of Abbott Park is owed more than $5 million, documents showed.

Liberty Medical listed CGS Administrators as its largest unsecured creditor, with a disputed claim of $137.2 million. Express Scripts Holding Co unit Medco Health Solutions Inc was next with a disputed claim of $14.2 million. Abbott was fifth.

Liberty is based in Port St Lucie, Fla. and provides home delivery of health care products. It said on its website more than 1 million Americans use Liberty Medical for daily diabetes supplies.

The company listed between 1,000 and 5,000 employees in its bankruptcy filing.

Nine affiliated entities also filed for bankruptcy, including Polymedica Corp and Liberty Healthcare Group Inc.

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Liberty Medical, related entities file for bankruptcy