H70.899
Billable codeOther mastoiditis and related conditions, unspecified ear
The ICD-10 code for other mastoiditis and related conditions, unspecified ear is H70.899.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •Laterality-specific codes exist for this condition — confirm the affected side is documented.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- H70.891Other mastoiditis and related conditions, right ear
- H70.892Other mastoiditis and related conditions, left ear
- H70.893Other mastoiditis and related conditions, bilateral
- H70.899Other mastoiditis and related conditions, unspecified ear
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 38389Approximate match
Associated MS-DRGs
H70.899 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.