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 initial encounter
 * D subsequent encounter
 * S sequela
 * T19.0 Foreign body in urethra
 * T19.1 Foreign body in bladder
 * T19.2 Foreign body in vulva and vagina
 * T19.3 Foreign body in uterus
 * T19.4 Foreign body in penis
 * T19.8 Foreign body in other parts of genitourinary tract
 * T19.9 Foreign body in genitourinary tract, part unspecified

=Burns and corrosions (T20-T32)=
 * Includes: burns (thermal) from electrical heating appliances
 * burns (thermal) from electricity
 * burns (thermal) from flame
 * burns (thermal) from friction
 * burns (thermal) from hot air and hot gases
 * burns (thermal) from hot objects
 * burns (thermal) from lightning
 * burns (thermal) from radiation
 * chemical burn [corrosion] (external) (internal)
 * scalds
 * Excludes2: erythema [dermatitis] ab igne (L59.0)
 * radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
 * sunburn (L55.-)

=Burns and corrosions of external body surface, specified by site (T20-T25) =
 * Includes: burns and corrosions of first degree [erythema]
 * burns and corrosions of second degree [blisters][epidermal loss]
 * burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
 * Use additional code from category T31 or T32 to identify extent of body surface involved

T20 Burn and corrosion of head, face, and neck

 * Excludes2: burn and corrosion of ear drum (T28.41, T28.91)
 * burn and corrosion of eye and adnexa (T26.-)
 * burn and corrosion of mouth and pharynx (T28.0)
 * The appropriate 7th character is to be added to each code from category T20 
 * A initial encounter
 * D subsequent encounter
 * S sequela
 * T20.0 Burn of unspecified degree of head, face, and neck