Q96.4

Q96.4: Mosaicism, 45, X/other cell line(s) with abnormal sex chromosome

Billable / specific codeICD-10-CMPOA exempt

Q96.4 is a billable, specific ICD-10-CM code for mosaicism, 45, x/other cell line(s) with abnormal sex chromosome. It is valid for submission on a claim.

Check Q96.4 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above Q96.4

A category’s note binds every code beneath it.

Written on Q96: Turner's syndrome

Noonan syndrome (Q87.19)

Other codes that can never be billed with Q96.4

Their own Excludes1 notes name this code, so the conflict is not listed above.

Q50.0Congenital absence of ovary
Q97Other sex chromosome abnormalities, female phenotype, not elsewhere classified
E28.3Primary ovarian failure

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Q96.4 is named in 4 Medicare coverage policies: 4 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A56781Billing and Coding: Transthoracic Echocardiography (TTE)
A57132Billing and Coding: Bone Mass Measurement
A57306Billing and Coding: Transthoracic Echocardiography (TTE)
A59040Billing and Coding: Bone Mass Measurement

Alphabetic index entries that lead here

Mosaicism, mosaic›45,X/other cell lines NEC with abnormal sex chromosome

Code history

Unchanged in every release from FY2024 to FY2027.