BASIS OF PRESENTATION (Policies)	3 Months Ended
BASIS OF PRESENTATION (Policies)	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	These Unaudited Consolidated Financial Statements should be read in conjunction with the Audited Consolidated Financial Statements, including the notes thereto, and other information included in the Annual Report on Form 10-K of BioScrip, Inc. and its wholly-owned subsidiaries (the “Company”) for the year ended December 31, 2016 (the “Annual Report”) filed with the U.S. Securities and Exchange Commission (“SEC”). These Unaudited Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information, and the instructions to Form 10-Q and Article 10 of Regulation S-X promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The information furnished in these Unaudited Consolidated Financial Statements reflects all adjustments, including normal recurring adjustments, which are, in the opinion of management, necessary for a fair presentation of the results for the interim periods presented. Operating results for the three months ended March 31, 2017 require management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes and are not necessarily indicative of the results that may be expected for the full year ending December 31, 2017.
Consolidation	The Unaudited Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.
Business Combinations	Business Combinations Business combinations are accounted for using the acquisition method as of the acquisition date, the date on which control is transferred to the Company. Goodwill is measured at the acquisition date as the fair value of the consideration transferred, plus the fair value of the identifiable assets acquired and liabilities assumed. Transaction costs are expensed as incurred. Contingent consideration payable is measured at fair value at the acquisition date. Contingent consideration classified as equity is not re-measured and settlement is accounted for within equity.
Cash and Cash Equivalents and Restricted Cash	Cash and Cash Equivalents and Restricted Cash Highly liquid investments with a maturity of three months or less when purchased are classified as cash equivalents. Restricted cash consists of cash balances held by financial institutions as collateral for letters of credit. These balances are reclassified to cash and cash equivalents when the underlying obligation is satisfied, or in accordance with the governing agreement. Restricted cash balances expected to become unrestricted during the next twelve months are recorded as current assets.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-04—Intangibles–Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. ASU 2017-04 modifies the accounting for goodwill impairment. The guidance removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The effective date for ASU 2017-04 is for annual or any interim periods beginning after December 15, 2019. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company’s business, financial position, results of operations or liquidity. In August 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-15—Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 provides guidance for eight specific cash flow issues with respect to how cash receipts and cash payments are classified in the statements of cash flows, with the objective of reducing diversity in practice. The effective date for ASU 2016-15 is for annual periods beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently assessing the impact of this new standard on its financial statements. In March 2016, the FASB issued ASU 2016-09—Compensation–Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”). ASU 2016-09 modifies the accounting for share-based payment awards, including income tax consequences, classification of awards as equity or liabilities, and classification on the statement of cash flows. The effective date for ASU 2016-09 is for annual periods beginning after December 15, 2016, and interim periods within those fiscal years. The adoption of this standard did not have a material impact on the Company’s business, financial position, results of operations or liquidity. In February 2016, the FASB issued ASU 2016-02—Leases (Topic 842), requiring lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. The effective date of the new standard for public companies is for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. The new standard must be adopted using a modified retrospective transition and requires application of the new guidance at the beginning of the earliest comparative period presented. The Company is evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures. In May 2014, the FASB issued ASU 2014-09—Revenue from Contracts with Customers (Topic 606). The guidance requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The FASB delayed the effective date to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. In addition, in March and April 2016, the FASB issued new guidance intended to improve the operability and understandability of the implementation guidance on principal versus agent considerations. Both amendments permit the use of either a retrospective or cumulative effect transition method and are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early application permitted. The Company is assessing the impact of this new standard on its financial statements and has not yet selected a transition method.