NATURE OF OPERATIONS AND PRESENTATION OF FINANCIAL STATEMENTS	9 Months Ended
Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Presentation of Financial Statements	NATURE OF OPERATIONS AND PRESENTATION OF FINANCIAL STATEMENTS Corporate Organization and Business — HC Group Holdings II, Inc. (“HC II”) was incorporated under the laws of the State of Delaware on January 7, 2015, with its sole shareholder being HC Group Holdings I, LLC. (“HC I”). On April 7, 2015, HC I and HC II collectively acquired Walgreens Infusion Services, Inc. and its subsidiaries from Walgreen Co., and the business was rebranded as Option Care (“Option Care”). On March 14, 2019, HC I and HC II entered into a definitive agreement (the “Merger Agreement”) to merge with and into a wholly-owned subsidiary of BioScrip, Inc. (“BioScrip”), a national provider of infusion and home care management solutions, along with certain other subsidiaries of BioScrip and HC II. The merger contemplated by the Merger Agreement (the “Merger”) was completed on August 6, 2019 (the “Merger Date”). The Merger was accounted for as a reverse merger under the acquisition method of accounting for business combinations with Option Care being considered the accounting acquirer and BioScrip being considered the legal acquirer. Under the terms of the Merger Agreement, shares of HC II common stock issued and outstanding immediately prior to the Merger Date were converted into 542,261,567 shares of BioScrip common stock, par value $0.0001 (the “BioScrip common stock”). BioScrip also issued an additional 28,193,428 shares to HC I in respect of certain outstanding unvested contingent restricted stock units of BioScrip, which are held in escrow to prevent dilution related to potential additional vesting on certain share-based instruments. See Note 16, Stockholders’ Equity, for additional discussion of these shares held in escrow. In conjunction with the Merger, holders of BioScrip preferred shares and certain warrants received 3,458,412 additional shares of BioScrip common stock and preferred shares were repurchased for $125.8 million of cash. In addition, all legacy BioScrip debt was settled for $575.0 million. As a result of the Merger, BioScrip’s stockholders hold approximately 19.1% of the combined company, and HC I holds approximately 80.9% of the combined company. Following the close of the transaction, BioScrip was rebranded as Option Care Health, Inc. (“Option Care Health”, or the “Company”). The combined company’s stock was listed on the Nasdaq Capital Market as of September 30, 2019. See Note 3, Business Acquisitions, for further discussion on the Merger. Option Care Health, and its wholly-owned subsidiaries, provides infusion therapy and other ancillary health care services through a national network of 132 locations. The Company contracts with managed care organizations, third-party payers, hospitals, physicians, and other referral sources to provide pharmaceuticals and complex compounded solutions to patients for intravenous delivery in the patients’ homes or other nonhospital settings. The Company operates in one segment, infusion services. Basis of Presentation — The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with generally accepted accounting principles (“GAAP”) in the United States and contain all adjustments, including normal recurring adjustments, necessary to present fairly the Company’s financial position, results of operations and cash flows for interim financial reporting. The results of operations for the interim periods presented are not necessarily indicative of the results of operations for the entire year. These unaudited condensed consolidated financial statements do not include all of the information and notes to the financial statements required by GAAP for complete financial statements and should be read in conjunction with the 2018 audited consolidated financial statements, including the notes thereto, as presented in the definitive merger proxy with the Securities and Exchange Commission filed on June 26, 2019. Principles of Consolidation — The Company’s unaudited condensed consolidated financial statements include the accounts of Option Care Health, Inc. and its subsidiaries. The BioScrip results have been included in the consolidated financial results since the Merger Date. All intercompany transactions and balances are eliminated in consolidation.

NATURE OF OPERATIONS AND PRESENTATION OF FINANCIAL STATEMENTS

Corporate Organization and Business — HC Group Holdings II, Inc. (“HC II”) was incorporated under the laws of the State of Delaware on January 7, 2015, with its sole shareholder being HC Group Holdings I, LLC. (“HC I”). On April 7, 2015, HC I and HC II collectively acquired Walgreens Infusion Services, Inc. and its subsidiaries from Walgreen Co., and the business was rebranded as Option Care (“Option Care”).

On March 14, 2019, HC I and HC II entered into a definitive agreement (the “Merger Agreement”) to merge with and into a wholly-owned subsidiary of BioScrip, Inc. (“BioScrip”), a national provider of infusion and home care management solutions, along with certain other subsidiaries of BioScrip and HC II. The merger contemplated by the Merger Agreement (the “Merger”) was completed on August 6, 2019 (the “Merger Date”). The Merger was accounted for as a reverse merger under the acquisition method of accounting for business combinations with Option Care being considered the accounting acquirer and BioScrip being considered the legal acquirer.

Under the terms of the Merger Agreement, shares of HC II common stock issued and outstanding immediately prior to the Merger Date were converted into 542,261,567 shares of BioScrip common stock, par value $0.0001 (the “BioScrip common stock”). BioScrip also issued an additional 28,193,428 shares to HC I in respect of certain outstanding unvested contingent restricted stock units of BioScrip, which are held in escrow to prevent dilution related to potential additional vesting on certain share-based instruments. See Note 16, Stockholders’ Equity, for additional discussion of these shares held in escrow. In conjunction with the Merger, holders of BioScrip preferred shares and certain warrants received 3,458,412 additional shares of BioScrip common stock and preferred shares were repurchased for $125.8 million of cash. In addition, all legacy BioScrip debt was settled for $575.0 million. As a result of the Merger, BioScrip’s stockholders hold approximately 19.1% of the combined company, and HC I holds approximately 80.9% of the combined company. Following the close of the transaction, BioScrip was rebranded as Option Care Health, Inc. (“Option Care Health”, or the “Company”). The combined company’s stock was listed on the Nasdaq Capital Market as of September 30, 2019. See Note 3, Business Acquisitions, for further discussion on the Merger.

Option Care Health, and its wholly-owned subsidiaries, provides infusion therapy and other ancillary health care services through a national network of 132 locations. The Company contracts with managed care organizations, third-party payers, hospitals, physicians, and other referral sources to provide pharmaceuticals and complex compounded solutions to patients for intravenous delivery in the patients’ homes or other nonhospital settings. The Company operates in one segment, infusion services.

Basis of Presentation — The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with generally accepted accounting principles (“GAAP”) in the United States and contain all adjustments, including normal recurring adjustments, necessary to present fairly the Company’s financial position, results of operations and cash flows for interim financial reporting. The results of operations for the interim periods presented are not necessarily indicative of the results of operations for the entire year. These unaudited condensed consolidated financial statements do not include all of the information and notes to the financial statements required by GAAP for complete financial statements and should be read in conjunction with the 2018 audited consolidated financial statements, including the notes thereto, as presented in the definitive merger proxy with the Securities and Exchange Commission filed on June 26, 2019.

Principles of Consolidation — The Company’s unaudited condensed consolidated financial statements include the accounts of Option Care Health, Inc. and its subsidiaries. The BioScrip results have been included in the consolidated financial results since the Merger Date. All intercompany transactions and balances are eliminated in consolidation.