H70.8

Non-Billable

ChapterH60–H95

Ranksubcategory

Official Description

Other mastoiditis and related conditions

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 8: Diseases of the Ear and Mastoid Process (H60-H95).

Instructional Notes

Excludes1(Not coded here)

preauricular sinus and cyst (Q18.1)
sinus, fistula, and cyst of branchial cleft (Q18.0)

General instructions are available for the parent sections:

View CH8 Notes

Clinical Hierarchy

CH8Diseases of the ear and mastoid process (H60-H95)

H65-H75Diseases of middle ear and mastoid (H65-H75)

H70Mastoiditis and related conditions

H70.8Other mastoiditis and related conditions

H70.81Postauricular fistula

H70.89Other mastoiditis and related conditions

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to H70.8:

chapterCH8

Diseases of the ear and mastoid process (H60-H95)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to H70.8. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths

Fistula (cutaneous)1 unique routes

postauricular→H70.8

Mastoiditis (coalescent) (hemorrhagic) (suppurative)1 unique routes

specified NEC→H70.8

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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