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HomeICD-10 CodesQ91
ICD-10-CM
Non-billable

Q91

Classification
Category:Congenital malformations, deformations and chromosomal abnormalities
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Coding Guidance
Q91 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.
Excludes 2
From Q00-Q99

More Specific Codes

Q91.0
Trisomy 18, nonmosaicism (meiotic nondisjunction)
Q91.1
Trisomy 18, mosaicism (mitotic nondisjunction)
Q91.2
Trisomy 18, translocation
Q91.3
Trisomy 18, unspecified
Q91.4
Trisomy 13, nonmosaicism (meiotic nondisjunction)
Q91.5
Trisomy 13, mosaicism (mitotic nondisjunction)
Q91.6
Trisomy 13, translocation
Q91.7
Trisomy 13, unspecified

External Resources

2025 ICD-10 guidelines from CMS.gov