<unk>  is a system of procedural codes. It is a subset of ICD-9-CM<unk> s 1 and 2 are used for diagnostic codes.)
The United States National Center for Health Statistics drafted ICD-10-PCS in 2000 as a potential replacement for<unk> , but the World Health Organization (WHO) has neither set an implementation date for ICD-10-PCS nor set a phase-out date for ICD-9-CM.  Hence,<unk>  is still in effect.
ICD-9-CM Volume 3
ICD-10 Chapter F
HAZMAT Class 1 Explosives
Index case
HAZMAT Class 9 Miscellaneous
DSM-IV Codes
Palpitation case study one
ESA guidelines classification scheme