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ICD-10-CM Code H74.03: Tympanosclerosis, bilateral
ICD-10-CM code H74.03 represents the diagnosis of bilateral tympanosclerosis. This code is listed in the ICD10CM 2025 edition and is grouped among diseases of the middle ear and mastoid. It is distinct from other middle ear conditions like adhesive middle ear disease, and it appears in Medicare billing and coding contexts. 1 2 3
Plain-language overview
Code H74.03 is designated for the diagnosis of tympanosclerosis when the condition is bilateral. The ICD10CM 2025 edition lists the official display label for this code as "Tympanosclerosis, bilateral." 1
What this code represents
The code H74.03 is grouped under the H65-H75 range of diseases of the middle ear and mastoid. This code specifically identifies tympanosclerosis affecting bilateral ears. 3
Coding details
The ICD-10-CM 2024 code tree lists H74.03 for bilateral tympanosclerosis alongside H74.01 for the right ear and H74.09 for an unspecified ear. The provided source does not list a distinct code for the left ear. 3
The code H74.03 for bilateral tympanosclerosis is listed separately from H74.13, which designates adhesive middle ear disease, bilateral. The source also lists H74.43 for polyp of middle ear, bilateral. 3
Coverage and utilization context
The code H74.03 appears in a CMS article that also lists H74.11 for adhesive right middle ear disease and H74.12 for adhesive left middle ear disease. The provided excerpt does not state that this code guarantees coverage. 2
What the sources add
The EVS Explore source lists H74.03 in the ICD10CM 2025 edition, while the Unbound Medicine source lists H74.03 in the ICD-10-CM 2024 code tree. Both sources identify the condition as tympanosclerosis, bilateral. 1 3
The CMS source lists H74.03 alongside codes for adhesive middle ear disease, while the Unbound Medicine source lists H74.03 alongside codes for right ear, unspecified ear, bilateral polyp, and bilateral cholesteatoma. The sources provide different lists of related codes. 2 3
Documentation considerations
The available sources establish that H74.03 is the code for bilateral tympanosclerosis and that separate codes exist for the right ear and unspecified ear. The sources do not state what specific clinical documentation elements are needed to select this code. 3
Sources
- EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
- Article - Billing and Coding: Vestibular and Audiologic Function Studies (A57434) — cms.gov; accessed 2026-07-25.
- ICD-10-CM 2024 | H65-H75 - Diseases of middle ear and mastoid — unboundmedicine.com; accessed 2026-07-25.
H74.03 policy automation walkthrough
Walk through the policies, prior authorization requirements, and workflow automation opportunities connected to this code.