Q99.819 — Usher syndrome, unspecified
Is Q99.819 billable?
Yes, but Q99.819 is an unspecified code. Q99.819 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Q99.819 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting Q99.819 — the more specific alternatives are listed below.
Q99.819 at a glance
| Code | Q99.819 |
|---|---|
| Description | Usher syndrome, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Q99.819 group to?
Q99.819 sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
- 565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
- 566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical
As a secondary diagnosis, Q99.819 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is Q99.819 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Q99.819. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Syndrome › usher
Use additional code — inherited from Q99.81
Report an additional code alongside Q99.819 to fully describe the condition. Q99.819 is sequenced first.
- code to identify any auditory and visual manifestations
Excludes2 — not included here — inherited from Chapter 17
The conditions below are not part of Q99.819, but a patient may have both at the same time. When documentation supports it, Q99.819 and the excluded code may both be reported.
- inborn errors of metabolism (E70-E88)
Excludes2 — not included here — inherited from Q90-Q99
The conditions below are not part of Q99.819, but a patient may have both at the same time. When documentation supports it, Q99.819 and the excluded code may both be reported.
- mitochondrial metabolic disorders (E88.4-)
How long has Q99.819 existed?
Q99.819 first appears in FY2026.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.