New code ยท FY2026
Not billable: this is a header. Use one of the more specific codes below.
- New code, effective October 1, 2025 (FY2026).
Code breakdown
Q99.81
- Q99CategoryOther chromosome abnormalities, not elsewhere classified
- 8Character 4Other specified chromosome abnormalities
- 1Character 5Usher syndrome
Coding notes
Use additional code
- code to identify any auditory and visual manifestations
Codes under Q99.81
- Q99.811 Usher syndrome, type 1
- Q99.812 Usher syndrome, type 2
- Q99.813 Usher syndrome, type 3
- Q99.818 Other Usher syndrome
- Q99.819 Usher syndrome, unspecified
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ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.