Q52.120 vs Q90
Q52.120 (Longitudinal vaginal septum, nonobstructing) compared with Q90 (Down syndrome), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Q52.120 carries an Excludes1 note covering Q90: “syndromes associated with anomalies in the number and form of chromosomes (Q90-Q99)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| Q52.120Longitudinal vaginal septum, nonobstructing | Q90Down syndrome | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Longitudinal vaginal septum, nonobstructing is a billable ICD-10-CM diagnosis code (Q52.120). | Down syndrome is a non-billable ICD-10-CM category code (Q90). |
| Use additional code | — | code(s) to identify any associated degree of intellectual disabilities (F70-F79) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources