As you asking here I am telling LSE's institution code is 0972 for TOEFL exam TOEFL IBT (Internet based test)- At least 107 overall with a minimum of 25 in each of the four components (in one sitting only).

Departments

Accounting
Anthropology
Economics
Economic History
European Institute
Finance
Gender Institute
Geography & Environment
Global Affairs (IGA)

Government
International Development
International History
International Inequalities Institute
International Relations
Language Centre
Law
Management
Mathematics

Media & Communications
Methodology
Philosophy, Logic and Scientific Method
Public Affairs (IPA)
Social Policy
Social Psychology
Sociology
Statistics

Address
London School of Economics and Political Science
Houghton Street
London
WC2A 2AE
UK