Certain infectious and parasitic diseases

R49.1 Aphonia
Loss of voice
R49.2 Hypernasality and hyponasality
R49.8 Other and unspecified voice disturbances
Change in voice NOS
General symptoms and signs
(R50-R69)
R50 Fever of other and unknown origin
Excludes: fever of unknown origin (during)(in):
· labour ( O75.2 )
· newborn ( P81.9 )
puerperal pyrexia NOS ( O86.4 )
R50.2 Drug-induced fever
Use additional external cause code (Chapter XX), if desired, to identify drug.
R50.8 Other specified fever
Fever with chills
Fever with rigors
Persistent fever
R50.9 Fever, unspecified
Hyperpyrexia NOS
Pyrexia NOS
Excludes: malignant hyperthermia due to anaesthesia ( T88.3 )
R51
R52
Headache
Facial pain NOS
Excludes: atypical facial pain ( G50.1 )
migraine and other headache syndromes ( G43-G44 )
trigeminal neuralgia ( G50.0 )
Pain, not elsewhere classified
Includes: pain not referable to any one organ or body region
Excludes: chronic pain personality syndrome ( F62.8 )
headache ( R51 )
pain (in):
· abdomen ( R10.- )
· back ( M54.9 )
· breast ( N64.4 )
· chest ( R07.1-R07.4 )
· ear ( H92.0 )
· eye ( H57.1 )
· joint ( M25.5 )
Version for 2007 599