H70 Mastoiditis and related conditions

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Mastoiditis and related conditions is H70 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
H65-H75: Diseases of middle ear and mastoid (H65-H75)
Category H70
54 codes (40 billable)
FY2026 Status
Stable since FY2024

Official Coding Guidelines

Chapter 8 reserved for future guideline expansion

8. Chapter 8: Diseases of the Ear and Mastoid Process (H60-H95) Reserved for future guideline expansion

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.8

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference H70 with the canonical source and edition:

H70 — Mastoiditis and related conditions. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/H70

Canonical URL: https://icd10codingpro.com/codes/H70

Related Codes

More Specific Codes

H70.0 Acute mastoiditis H70.1 Chronic mastoiditis H70.2 Petrositis H70.8 Other mastoiditis and related conditions H70.9 Unspecified mastoiditis

All Codes in H70

Every most-specific code under H70 Mastoiditis and related conditions (40 codes):

Show the complete H70 code list
H70.001 Acute mastoiditis without complications, right ear H70.002 Acute mastoiditis without complications, left ear H70.003 Acute mastoiditis without complications, bilateral H70.009 Acute mastoiditis without complications, unspecified ear H70.011 Subperiosteal abscess of mastoid, right ear H70.012 Subperiosteal abscess of mastoid, left ear H70.013 Subperiosteal abscess of mastoid, bilateral H70.019 Subperiosteal abscess of mastoid, unspecified ear H70.091 Acute mastoiditis with other complications, right ear H70.092 Acute mastoiditis with other complications, left ear H70.093 Acute mastoiditis with other complications, bilateral H70.099 Acute mastoiditis with other complications, unspecified ear H70.10 Chronic mastoiditis, unspecified ear H70.11 Chronic mastoiditis, right ear H70.12 Chronic mastoiditis, left ear H70.13 Chronic mastoiditis, bilateral H70.201 Unspecified petrositis, right ear H70.202 Unspecified petrositis, left ear H70.203 Unspecified petrositis, bilateral H70.209 Unspecified petrositis, unspecified ear H70.211 Acute petrositis, right ear H70.212 Acute petrositis, left ear H70.213 Acute petrositis, bilateral H70.219 Acute petrositis, unspecified ear H70.221 Chronic petrositis, right ear H70.222 Chronic petrositis, left ear H70.223 Chronic petrositis, bilateral H70.229 Chronic petrositis, unspecified ear H70.811 Postauricular fistula, right ear H70.812 Postauricular fistula, left ear H70.813 Postauricular fistula, bilateral H70.819 Postauricular fistula, unspecified ear H70.891 Other mastoiditis and related conditions, right ear H70.892 Other mastoiditis and related conditions, left ear H70.893 Other mastoiditis and related conditions, bilateral H70.899 Other mastoiditis and related conditions, unspecified ear H70.90 Unspecified mastoiditis, unspecified ear H70.91 Unspecified mastoiditis, right ear H70.92 Unspecified mastoiditis, left ear H70.93 Unspecified mastoiditis, bilateral
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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