Magellan Health 10K 2007 Annual report | MGLN Filing

QuickLinks -- Click here to rapidly navigate through this document

Exhibit 21

C=corporation; CLS=company limited by shares; GP=general partnership; LLC=limited liability company; LP=limited partnership; MC=medical corporation; NP=non-profit corporation; PC=professional corporation; ULLC=unlimited liability company

MAGELLAN HEALTH SERVICES, INC.
LIST OF SUBSIDIARIES

Entity Name:				Jurisdiction of Domicile:	Entity Type:
Correctional Behavioral Solutions of New Jersey, Inc.				New Jersey	C
Green Spring Health Services, Inc.				Delaware	C
	Subsidiaries:
	Advantage Behavioral Systems, Inc.(1)			Pennsylvania	C
	AdvoCare of Tennessee, Inc.			Tennessee	C
		Subsidiary:
		Premier Holdings, LLC		Tennessee	LLC
			Subsidiary:
			Premier Behavioral Systems of Tennessee, LLC(2)	Tennessee	LLC
	ICORE Healthcare, LLC(3)			Delaware
			Subsidiary:
			ONCORE Healthcare, LLC
	Magellan Behavioral of Michigan, Inc.			Michigan	C
	Magellan Behavioral Health of New Jersey, LLC			New Jersey	LLC
	Managed Care Services Mainstay of Central Pennsylvania, Inc.(4)			Pennsylvania	C
	Magellan Health Services of California, Inc.—Employer Services(5)			California	C
Magellan Behavioral Health, Inc.				Delaware	C
	Subsidiaries:
	Human Affairs International of California, Inc.			California	C
	Magellan Behavioral Health of Colorado, Inc.			Colorado	C
	Magellan Behavioral Health of Florida, Inc.			Florida	C
		Subsidiary:
		The Community Based Care Partnership, Ltd. (6)		Florida

(1): Acquired as a result of the merger of former parent, TAO, Inc. and Green Spring Health Services, Inc. on 9/30/96.
(2): 100% owned by Premier Holdings, Inc.
(3): 100% owned by Green Spring Health Services, Inc.
(4): Acquired by Green Spring Health Services, Inc. on 4/1/97.
(5): Acquired by Green Spring Health Services, Inc. on 1/1/98. Former name was Vista Behavioral Health Plans—Merit Behavioral Care of California merged into this entity and the name of the surviving entity was changed to Magellan Health Services of California, Inc.—Employer Services on 12/30/05.

Magellan Behavioral Health Systems, LLC(7)			Utah	LLC
	Subsidiary:
	Human Affairs International of Pennsylvania, Inc.		Pennsylvania	C
Magellan Health Services of Arizona, Inc.			Arizona	C
Magellan CBHS Holdings, LLC			Delaware	LLC
	Subsidiaries:
	Charter Alvarado Behavioral Health System, Inc.		California	C
	Charter Bay Harbor Behavioral Health System, Inc.		Florida	C
	Charter Behavioral Health System of Dallas, Inc.		Texas	C
	Charter Behavioral Health System of Delmarva, Inc.		Maryland	C
	Charter Behavioral Health System at Hidden Brook, Inc.		Maryland	C
	Charter Behavioral Health System of Lafayette, Inc.		Louisiana	C
		Subsidiary:
		The Charter Cypress Behavioral Health System, L.L.C.(8)	Tennessee	LLC
	Charter Behavioral Health System of Lake Charles, Inc.		Louisiana	C
	Charter Behavioral Health System of Massachusetts, Inc.		Massachusetts	C
	Charter Behavioral Health System of New Mexico, Inc.		New Mexico	C
		Subsidiary:
		The Charter Heights Behavioral Health System Limited Partnership(9)	Delaware	LP
	Charter Behavioral Health System of Paducah, Inc.		Kentucky	C
	Charter Behavioral Health System at Potomac Ridge, Inc.		Maryland	C
	Charter Centennial Peaks Behavioral Health System, Inc.		Colorado	C
	Charter Fairmount Behavioral Health System, Inc.		Pennsylvania	C
	Charter Fenwick Hall Behavioral Health System, Inc.		South Carolina	C
	Charter Hospital of Santa Teresa, Inc.		New Mexico	C
	Charter Hospital of St. Louis, Inc.		Missouri	C

(6): Partnership between Magellan Behavioral Health of Florida, Inc. and Community Based Care of Seminole, Inc. (non- Magellan entity).
(7): Acquired by Magellan Health Services, Inc. on 12/4/97 from Aetna US Healthcare, Inc. Formerly known as Human Affairs International, Inc. The stock of this company was distributed to Magellan Behavioral Health, Inc. on 12/14/01 and the corporation was converted into a limited liability company on 12/31/01 with Magellan Behavioral Health, Inc. being t he sole member.
(8): 50% owned by Charter Behavioral Health System of Lafayette, Inc.
(9): 67% owned by Charter Behavioral Health System of New Mexico, Inc.

	Charter Lakeside Behavioral Health Systems, Inc.			Tennessee	C
	Charter Linden Oaks Behavioral Health System, Inc.			Illinois	C
		Subsidiary:
		Naperville Psychiatric Ventures(10)		Illinois	GP
	Charter Medical—Clayton County, Inc.			Georgia	C
	Charter Medical—Long Beach, Inc.			California	C
	Charter Medical of Puerto Rico, Inc.			Puerto Rico	C
	Charter MOB of Charlottesville, Inc.			Virginia	C
		Subsidiary:
		Mental Healthsource, L.L.C.(11)		Virginia	LLC
	Charter North Star Behavioral Health System, L.L.C.(12)			Tennessee	LLC
	Charter Northridge Behavioral Health System, Inc.			North Carolina	C
		Subsidiary:
		Holly Hill/Charter Behavioral Health System, L.L.C.(13)		Tennessee	LLC
	Florida Health Facilities, Inc.			Florida	C
	Plymouth Insurance Company, Ltd.			Bermuda	C
MBH of Puerto Rico, Inc.				Puerto Rico	C
Merit Behavioral Care Corporation(14)				Delaware	C
	Subsidiaries:
	AGCA, Inc.			Pennsylvania	C
		Subsidiary:
		AGCA New York, Inc.		New York	C
			Subsidiary:
			U.S. IPA Providers, Inc.	New York	C
	Arizona Biodyne, Inc.			Arizona	C
	Magellan HRSC, Inc.(15)			Ohio	C

(10): 75% owned by Charter Linden Oaks Behavioral Health System, Inc.
(11): 50% owned by Charter MOB of Charlottesville, Inc. (previously 50% owned by Charter Behavioral Health System of Central Virginia,, Inc. which merged in Charter MOB of Charlottesville on 1/28/00)
(12): 57% owned by Magellan CBHS Holdings, Inc.
(13): 50% owned by Charter Northridge Behavioral Health System, Inc.
(14): Acquired on 2/12/98 by stock purchase. The holding company, MBCH, Inc., merged into Magellan Behavioral Health, Inc. on 2/15/01, thereby transferring the ownership of Merit Behavioral Care Corporation and its subsidiaries under Magellan Behavioral Health, Inc. American Biodyne, Inc. merged into its parent, Merit Behavioral Care Corporation on 5/31/02.
(15): Formerly known as Merit Behavioral Care Systems Corporation

		Magellan Health Services of New Mexico, Inc.		New Mexico	C
		Merit Behavioral Care of Massachusetts, Inc.		Massachusetts	C
			Subsidiary:
			Magellan Behavioral Health of Connecticut, LLC	Connecticut	LLC
		Magellan Behavioral Health of Pennsylvania, Inc.		Pennsylvania	C
		CMG Health, Inc.(16)		Maryland	C
			Montana Community Partners, Inc.(17)	Montana	C
		Continuum Behavioral Care, LLC(18)		Rhode Island	LLC
		Continuum Behavioral Healthcare Corporation		Delaware	C
		Magellan Behavioral Health Providers of Texas, Inc.		Texas	C
		MBC of America, Inc.		Delaware	C
			Subsidiary:
			Empire Community Delivery Systems, LLC(19)	New York	LLC
		MBC of North Carolina, LLC		North Carolina	LLC
		Magellan Behavioral Care of Iowa, Inc.		Iowa	C
		Merit Health Insurance Company		Illinois	C
			Subsidiary:
			Magellan Life Insurance Company	Delaware	C
		Merit INROADS Behavioral Health Services, LLC(20)		Delaware	LLC
			Subsidiary:
			Merit INROADS Behavioral Health Services of Illinois, LLC(21)	Illinois	LLC
	PPC Group, Inc.			Delaware	C
	P.P.C., Inc.			Missouri	C
		Subsidiary:
		Personal Performance Consultants of New York, Inc.		New York	C
	National Imaging Associates, Inc.			Delaware
		Subsidiary:
		NIA IPA of New York, Inc.		New York
	Tennessee Behavioral Health, Inc.(22)			Tennessee	C
Magellan Capital, Inc.(23)				Delaware	LLC
Magellan Financial Capital, Inc.				Nevada	C
Magellan Sub Co III, Inc.				Florida	C

(16): Acquired by stock purchase on 9/11/97.
(17): 55% owned by CMG Health, Inc.
(18): 50% owned by Merit Behavioral Care Corporation
(19): 16.667% owned by MBC of America, Inc.
(20): 100% owned by Merit Behavioral Care Corporation
(21): 99% owned by Merit INROADS Behavioral Health Services, LLC; 1% owned by Magellan HRSC, Inc.
(22): Acquired as a result of a stock purchase on 3/31/99.
(23): Formerly known as Magellan Capital, Inc. Ownership transferred from Green Spring Health Services, Inc. to Magellan Health Services, Inc. Name changed back to Magellan Capital, Inc. on 3/24/05.

QuickLinks

Exhibit 21

MAGELLAN HEALTH SERVICES, INC. LIST OF SUBSIDIARIES

Positive
Negative
Uncertain
Constraining
Legalese
Litigous
Readability	H.S. freshman Avg

Magellan Health (MGLN) 10-K2007 FY Annual report

Content analysis