ICD-9-CM Vol. 1 Diagnostic Codes
6. DISEASES OF THE NERVOUS SYSTEM AND SENSE ORGANS (320-389)
section notes
DISEASES OF THE EAR AND MASTOID PROCESS (380-389)
section notes
380 Disorders of external ear
section notes
380.8 Other disorders of external ear
section notes
380.81   Exostosis ext ear canal
380.89   Dis external ear NEC
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