General	12 Months Ended
Dec. 31, 2016
General
General	1. General Basis of Presentation The consolidated financial statements of Magellan Health, Inc., a Delaware corporation (“Magellan”), include Magellan and its subsidiaries (together with Magellan, the “Company”). All significant intercompany accounts and transactions have been eliminated in consolidation. Business Overview The Company is engaged in the healthcare management business, and is focused on managing the fastest growing, most complex areas of health, including special populations, complete pharmacy benefits and other specialty areas of healthcare. The Company develops innovative solutions that combine advanced analytics, agile technology and clinical excellence to drive better decision making, positively impact health outcomes and optimize the cost of care for the members we serve. The Company provides services to health plans and other managed care organizations (“MCOs”), employers, labor unions, various military and governmental agencies and third party administrators (“TPAs”). Healthcare Healthcare includes the Company’s: (i) management of behavioral healthcare services and employee assistance program (“EAP”) services, (ii) management of other specialty areas including diagnostic imaging and musculoskeletal management, and (iii) the integrated management of physical, behavioral and pharmaceutical healthcare for special populations, delivered through Magellan Complete Care (“MCC”). These special populations include individuals with serious mental illness (“SMI”), dual eligibles, long‑term services and supports and other populations with unique and often complex healthcare needs. The Company’s coordination and management of these healthcare services are provided through its comprehensive network of medical and behavioral health professionals, clinics, hospitals and ancillary service providers. This network of credentialed and privileged providers is integrated with clinical and quality improvement programs to improve access to care and enhance the healthcare experience for individuals in need of care, while at the same time making the cost of these services more affordable for our customers. The Company generally does not directly provide or own any provider of treatment services, although it does employ licensed behavioral health counselors to deliver non‑medical counseling under certain government contracts. The Healthcare segment’s commercial division serves a variety of customers, with services, inclusive of special population management, provided under contracts with health plans and accountable care organizations for some or all of their commercial, Medicaid and Medicare members, as well as with employers. The government division contracts with local, state and federal governmental agencies to provide services to recipients under Medicaid, Medicare and other government programs. The Company provides its management services primarily through: (i) risk‑based products, where the Company assumes all or a substantial portion of the responsibility for the cost of providing treatment services in exchange for a fixed per member per month fee and (ii) administrative services only (“ASO”) products, where the Company provides services such as utilization review, claims administration and/or provider network management, but does not assume responsibility for the cost of the treatment services. Pharmacy Management The Pharmacy Management segment (“Pharmacy Management”) comprises products and solutions that provide clinical and financial management of pharmaceuticals paid under medical and pharmacy benefit programs. Pharmacy Management’s services include: (i) pharmacy benefit management (“PBM”) services; (ii) pharmacy benefit administration (“PBA”) for state Medicaid and other government sponsored programs; (iii) pharmaceutical dispensing operations; (iv) clinical and formulary management programs; (v) medical pharmacy management programs; and (vi) programs for the integrated management of specialty drugs across both the medical and pharmacy benefit that treat complex conditions, regardless of site of service, method of delivery, or benefit reimbursement. Pharmacy Management’s services are provided under contracts with health plans, employers, MCOs, state Medicaid programs, Medicare Part D and other government agencies, and encompass risk‑based and fee‑for‑service (“FFS”) arrangements. In addition, Pharmacy Management has subcontract arrangements to provide PBM services for certain Healthcare customers. Corporate This segment of the Company is comprised primarily of amounts not allocated to the Healthcare and Pharmacy Management segments that are largely associated with costs related to being a publicly traded company. In order to better represent the operations of the Company’s segments, effective January 1, 2016, the Company began allocating operational and corporate support costs to the Healthcare and Pharmacy Management segments. These costs, which were historically reported in the Corporate segment, include operational support functions such as sales and marketing and information technology, as well as corporate support functions such as executive, finance and human resources. Prior period balances have been reclassified to reflect this change

1. General

Basis of Presentation

The consolidated financial statements of Magellan Health, Inc., a Delaware corporation (“Magellan”), include Magellan and its subsidiaries (together with Magellan, the “Company”). All significant intercompany accounts and transactions have been eliminated in consolidation.

Business Overview

The Company is engaged in the healthcare management business, and is focused on managing the fastest growing, most complex areas of health, including special populations, complete pharmacy benefits and other specialty areas of healthcare. The Company develops innovative solutions that combine advanced analytics, agile technology and clinical excellence to drive better decision making, positively impact health outcomes and optimize the cost of care for the members we serve. The Company provides services to health plans and other managed care organizations (“MCOs”), employers, labor unions, various military and governmental agencies and third party administrators (“TPAs”).

Healthcare

Healthcare includes the Company’s: (i) management of behavioral healthcare services and employee assistance program (“EAP”) services, (ii) management of other specialty areas including diagnostic imaging and musculoskeletal management, and (iii) the integrated management of physical, behavioral and pharmaceutical healthcare for special populations, delivered through Magellan Complete Care (“MCC”). These special populations include individuals with serious mental illness (“SMI”), dual eligibles, long‑term services and supports and other populations with unique and often complex healthcare needs.

The Company’s coordination and management of these healthcare services are provided through its comprehensive network of medical and behavioral health professionals, clinics, hospitals and ancillary service providers. This network of credentialed and privileged providers is integrated with clinical and quality improvement programs to improve access to care and enhance the healthcare experience for individuals in need of care, while at the same time making the cost of these services more affordable for our customers. The Company generally does not directly provide or own any provider of treatment services, although it does employ licensed behavioral health counselors to deliver non‑medical counseling under certain government contracts.

The Healthcare segment’s commercial division serves a variety of customers, with services, inclusive of special population management, provided under contracts with health plans and accountable care organizations for some or all of their commercial, Medicaid and Medicare members, as well as with employers. The government division contracts with local, state and federal governmental agencies to provide services to recipients under Medicaid, Medicare and other government programs.

The Company provides its management services primarily through: (i) risk‑based products, where the Company assumes all or a substantial portion of the responsibility for the cost of providing treatment services in exchange for a fixed per member per month fee and (ii) administrative services only (“ASO”) products, where the Company provides services such as utilization review, claims administration and/or provider network management, but does not assume responsibility for the cost of the treatment services.

Pharmacy Management

The Pharmacy Management segment (“Pharmacy Management”) comprises products and solutions that provide clinical and financial management of pharmaceuticals paid under medical and pharmacy benefit programs. Pharmacy Management’s services include: (i) pharmacy benefit management (“PBM”) services; (ii) pharmacy benefit administration (“PBA”) for state Medicaid and other government sponsored programs; (iii) pharmaceutical dispensing operations; (iv) clinical and formulary management programs; (v) medical pharmacy management programs; and (vi) programs for the integrated management of specialty drugs across both the medical and pharmacy benefit that treat complex conditions, regardless of site of service, method of delivery, or benefit reimbursement.

Pharmacy Management’s services are provided under contracts with health plans, employers, MCOs, state Medicaid programs, Medicare Part D and other government agencies, and encompass risk‑based and fee‑for‑service (“FFS”) arrangements. In addition, Pharmacy Management has subcontract arrangements to provide PBM services for certain Healthcare customers.

Corporate

This segment of the Company is comprised primarily of amounts not allocated to the Healthcare and Pharmacy Management segments that are largely associated with costs related to being a publicly traded company. In order to better represent the operations of the Company’s segments, effective January 1, 2016, the Company began allocating operational and corporate support costs to the Healthcare and Pharmacy Management segments. These costs, which were historically reported in the Corporate segment, include operational support functions such as sales and marketing and information technology, as well as corporate support functions such as executive, finance and human resources. Prior period balances have been reclassified to reflect this change