Q99.81 – Usher syndrome

ICD-10-CM 2027 diagnosis code · Chromosomal abnormalities, not elsewhere classified

Non-billable header

ICD-10-CM code Q99.81

Code: Q99.81 (claims format: Q9981)
Description: Usher syndrome
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
Block: Q90-Q99 Chromosomal abnormalities, not elsewhere classified
Parent codes: Q99 › Q99.8

Billable codes under Q99.81

Q99.81 is a header code and cannot be used on claims. Choose the most specific code:

Q99.811 – Usher syndrome, type 1Billable
Q99.812 – Usher syndrome, type 2Billable
Q99.813 – Usher syndrome, type 3Billable
Q99.818 – Other Usher syndromeBillable
Q99.819 – Usher syndrome, unspecifiedBillable

Notes for Q99.81

Use additional code:

code to identify any auditory and visual manifestations

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block Q90-Q99

Excludes2 (not included here):

mitochondrial metabolic disorders (E88.4-)

Related codes in Q99.8

Q99.89 – Other specified chromosome abnormalitiesBillable

Frequently asked questions

What is ICD-10 code Q99.81?

Q99.81 is the ICD-10-CM code for usher syndrome, in the block Q90-Q99 (Chromosomal abnormalities, not elsewhere classified).

Is Q99.81 a billable code?

No. Q99.81 is a header code with more specific child codes; report one of the billable codes listed above.

What category does Q99.81 belong to?

It belongs to category Q99 – Other chromosome abnormalities, not elsewhere classified.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.