General	12 Months Ended
Dec. 31, 2017
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 a leader within the healthcare management business, and is focused on delivering innovative specialty solutions for the fastest growing, most complex areas of health, including special populations, complete pharmacy benefits, and other specialty carve-out areas of healthcare. The Company develops innovative solutions that combine advanced analytics, agile technology and clinical excellence to drive better decision making, positively impact members’ health outcomes and optimize the cost of care for the customers 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”). Magellan operates three segments: Healthcare, Pharmacy Management and Corporate. Healthcare The Healthcare segment is comprised of two reporting units – Commercial and Government. The Commercial reporting unit’s customers include health plans, accountable care organizations (“ACOs”), and employers for whom Magellan provides carve-out management services for behavioral health, employee assistance plans (“EAP”), and other areas of specialty healthcare including diagnostic imaging, musculoskeletal management, cardiac, and physical medicine. These management services are applied to a health plan’s or ACO’s entire book of business including commercial, Medicaid and Medicare members or targeted complex populations basis. The Government reporting unit contracts with local, state and federal governmental agencies to provide services to recipients under Medicaid, Medicare and other government programs. Currently these management services include behavioral health and EAP. The management of total medical cost, as well as long term support services, for special populations is delivered through Magellan Complete Care (“MCC”). These special populations include individuals with serious mental illness (“SMI”), dual eligibles, aged, blind and disabled (“ABD”) and other populations with unique and often complex healthcare needs. Magellan’s coordination and management of these healthcare and long term support services are provided through its comprehensive network of medical and behavioral health professionals, clinics, hospitals, skilled nursing facilities, home care agencies and ancillary service providers. This network of credentialed 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 Company provides its Healthcare 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, or (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 full responsibility for the cost of the treatment services, in exchange for an administrative fee and, in some instances, a gain share. Pharmacy Management The Pharmacy Management segment (“Pharmacy Management”) is comprised of products and solutions that provide clinical and financial management of pharmaceuticals paid under both the medical and the pharmacy benefit. 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. These services are available individually, in combination, or in a fully integrated manner. The Company markets its pharmacy management services to health plans, employers, third party administrators, managed care organizations, state governments, Medicare Part D, and other government agencies, exchanges, brokers and consultants. In addition, the Company will continue to upsell its pharmacy products to its existing customers and market its pharmacy solutions to the Healthcare customer base. Pharmacy Management contracts with its customers for services using risk‑based, gain share or ASO arrangements. In addition, Pharmacy Management provides services to the Healthcare segment for its MCC business. 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.

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 a leader within the healthcare management business, and is focused on delivering innovative specialty solutions for the fastest growing, most complex areas of health, including special populations, complete pharmacy benefits, and other specialty carve-out areas of healthcare. The Company develops innovative solutions that combine advanced analytics, agile technology and clinical excellence to drive better decision making, positively impact members’ health outcomes and optimize the cost of care for the customers 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”). Magellan operates three segments: Healthcare, Pharmacy Management and Corporate.

Healthcare

The Healthcare segment is comprised of two reporting units – Commercial and Government.

The Commercial reporting unit’s customers include health plans, accountable care organizations (“ACOs”), and employers for whom Magellan provides carve-out management services for behavioral health, employee assistance plans (“EAP”), and other areas of specialty healthcare including diagnostic imaging, musculoskeletal management, cardiac, and physical medicine. These management services are applied to a health plan’s or ACO’s entire book of business including commercial, Medicaid and Medicare members or targeted complex populations basis.

The Government reporting unit contracts with local, state and federal governmental agencies to provide services to recipients under Medicaid, Medicare and other government programs. Currently these management services include behavioral health and EAP. The management of total medical cost, as well as long term support services, for special populations is delivered through Magellan Complete Care (“MCC”). These special populations include individuals with serious mental illness (“SMI”), dual eligibles, aged, blind and disabled (“ABD”) and other populations with unique and often complex healthcare needs.

Magellan’s coordination and management of these healthcare and long term support services are provided through its comprehensive network of medical and behavioral health professionals, clinics, hospitals, skilled nursing facilities, home care agencies and ancillary service providers. This network of credentialed 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 Company provides its Healthcare 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, or (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 full responsibility for the cost of the treatment services, in exchange for an administrative fee and, in some instances, a gain share.

Pharmacy Management

The Pharmacy Management segment (“Pharmacy Management”) is comprised of products and solutions that provide clinical and financial management of pharmaceuticals paid under both the medical and the pharmacy benefit. 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.

These services are available individually, in combination, or in a fully integrated manner. The Company markets its pharmacy management services to health plans, employers, third party administrators, managed care organizations, state governments, Medicare Part D, and other government agencies, exchanges, brokers and consultants. In addition, the Company will continue to upsell its pharmacy products to its existing customers and market its pharmacy solutions to the Healthcare customer base.

Pharmacy Management contracts with its customers for services using risk‑based, gain share or ASO arrangements. In addition, Pharmacy Management provides services to the Healthcare segment for its MCC business.

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.