This code system http://fhir.health.gov.lk/CodeSystem/lk-core-institution-type-cs defines the following codes:

Code	Display
IT01	Teaching
IT02	NTS
IT03	District General
IT04	Provincial General
IT05	Medical Supplies
IT06	Base A
IT07	Base B
IT08	Nephrology
IT09	Prison
IT10	Engineering
IT11	Food and Nutrition
IT12	Head Office
IT13	Mental
IT14	Other
IT15	Port
IT16	Dental
IT17	Anti Filariasis
IT18	Anti Leprosy
IT19	Anti Malaria
IT20	Cancer Control
IT21	Dengue Control
IT22	Epidemiology
IT23	Family Health
IT24	NPTCCD
IT25	STD/AIDS Control
IT26	Training
IT27	Divisional A
IT28	Divisional B
IT29	PMCU
IT30	Divisional C
IT31	MOH
IT32	Laboratory
IT33	MLTT
IT34	NIHS
IT35	Faculty of Medicine
IT36	Other
IT37	PDHS
IT38	Provincial Ministry
IT39	RDHS
IT40	ADC
IT41	Leprosy
IT42	CDC
IT43	RTC
IT44	Rehabilitation