ICD-10 CM Code H70.813
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H70 Mastoiditis and related conditions
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H70.8 Other mastoiditis and related conditions
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H70.81 Postauricular fistula
H70.813
Postauricular fistula, bilateral
Excludes Type 1
- preauricular sinus and cyst (Q18.1)
- sinus, fistula, and cyst of branchial cleft (Q18.0)
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