ICD-10 Coding for Down Syndrome(Q21.2U, Q90.0, Q90.0B)
Comprehensive guide to ICD-10 coding for Down syndrome, including nonmosaic, mosaic, and translocation types, with documentation requirements.
Complete code families applicable to Down Syndrome
Compare key differences between these codes to ensure accurate selection
| Code | Description | When to Use | Key Documentation |
|---|---|---|---|
| Q90.0 | Trisomy 21, nonmosaicism | Use when genetic testing confirms nonmosaic trisomy 21. |
|
| Q90.1 | Trisomy 21, mosaicism | Use when genetic testing confirms mosaic trisomy 21. |
|
| Q90.2 | Trisomy 21, translocation | Use when genetic testing confirms translocation trisomy 21. |
|
| Q90.9 | Down syndrome, unspecified | Use when Down syndrome is suspected but not yet confirmed by genetic testing. |
|
Clinical Decision Support
Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.
Key Information
Essential facts and insights aboutDown Syndrome
Alternative codes to consider when ruling out similar conditions
Documentation & Coding Risks
Avoid these common issues when documenting Down Syndrome.
Failure to update code after genetic testing results.
Impact
Clinical: May lead to inappropriate treatment plans., Regulatory: Non-compliance with coding standards., Financial: Potential loss of reimbursement due to incorrect DRG.
Mitigation
Regularly review genetic testing results., Update codes promptly upon confirmation.
Using Q90.9 indefinitely without genetic confirmation.
Impact
Reimbursement: May lead to incorrect DRG assignment and reimbursement issues., Compliance: Non-compliance with coding guidelines., Data Quality: Impacts accuracy of patient records and data reporting.
Mitigation
Update to specific code (Q90.0, Q90.1, or Q90.2) once genetic testing confirms the type.
Genetic Testing Documentation
Impact
Lack of genetic testing documentation can lead to audit failures.
Mitigation
Ensure all genetic testing results are included in the patient's medical record.