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

381 Nonsuppurative otitis media and Eustachian tube disorders

section notes

381.6 Obstruction of Eustachian tube

section notes
381.60   Obstr eustach tube NOS
381.61   Osseous eustachian obstr
381.62   Intrinsic eustach obstr
381.63   Extrinsic eustach obstr
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