Q96.4

Mosaicism, 45, X/other cell line(s) with abnormal sex chromosome

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 2 never code together

Q96code

Excludes1

Noonan syndrome (Q87.19)Q87.19

Q90-Q99block

Excludes2

mitochondrial metabolic disorders (E88.4-)E88.4-

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes

No further instructional notes apply.

Index entries leading here 1

Mosaicism, mosaic (autosomal) (chromosomal)
- 45,X/other cell lines NEC with abnormal sex chromosome Q96.4

Alongside this code 6 same parent — Q96

Q96.0 Karyotype 45, X Q96.1 Karyotype 46, X iso (Xq) Q96.2 Karyotype 46, X w abnormal sex chromosome, except iso (Xq) Q96.3 Mosaicism, 45, X/46, XX or XY Q96.8 Other variants of Turner's syndrome Q96.9 Turner's syndrome, unspecified

Medications 2

3 Sex Chromosome Disorders drugs 3 Sex Chromosome Disorders of Sex Development drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: Q96
Block: Q90-Q99
Siblings: 6

Present FY2024–FY2027.