2026 ICD-10-CM Diagnosis Code H75.01Mastoiditis in infectious and parasitic diseases classified elsewhere, right ear
ICD-10-CM Codes›H60–H95›H65-H75›H75
- Billable — Valid for Submission
- Not Chronic
H75.01 is a billable ICD-10-CM diagnosis code for mastoiditis in infectious and parasitic diseases classified elsewhere, right ear. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 154 through 156. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diseases of middle ear and mastoid (except otitis media).
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for H75.01.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Ear Disorders
Your ear has three main parts: outer, middle and inner. You use all of them in hearing. Sound waves come in through your outer ear. They reach your middle ear, where they make your eardrum vibrate. The vibrations are transmitted through three tiny bones, called ossicles, in your middle ear.
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Convert H75.01 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H75.01Overview
Is H75.01 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report mastoiditis in infectious and parasitic diseases classified elsewhere, right ear on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does H75.01 group to?
On inpatient claims, mastoiditis in infectious and parasitic diseases classified elsewhere, right ear maps to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.
Can H75.01 be a principal diagnosis?
No. This is a manifestation code: mastoiditis in infectious and parasitic diseases classified elsewhere, right ear describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of H75.01?
Under the General Equivalence Mappings, mastoiditis in infectious and parasitic diseases classified elsewhere, right ear converts to ICD-9-CM 383.89 (disorders of mastoid NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
