ICD-10-CM
ICD-10 code for Syndrome Swyer: Q99.1
The ICD-10-CM index points "Syndrome Swyer" to Q99.1, 46, XX true hermaphrodite. Q99.1 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in Q99
A header groups codes and is not billed. A billable code is one you can report.
- Q99Other chromosome abnormalities, not elsewhere classifiedHeader
- Q99.0Chimera 46, XX/46, XYBillable
- Q99.146, XX true hermaphroditeBillable
- Q99.2Fragile X chromosomeBillable
- Q99.8Other specified chromosome abnormalitiesHeader
- Q99.81Usher syndromeHeader
- Q99.811Usher syndrome, type 1Billable
- Q99.812Usher syndrome, type 2Billable
- Q99.813Usher syndrome, type 3Billable
- Q99.818Other Usher syndromeBillable
- Q99.819Usher syndrome, unspecifiedBillable
- Q99.89Other specified chromosome abnormalitiesBillable
- Q99.9Chromosomal abnormality, unspecifiedBillable
Related conditions
Related pages
- Q99.1 code detailsNotes, nearby codes, CMS-HCC group
- Category Q99Every code under it
- Chapter 17Congenital malformations and chromosomal abnormalities
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Syndrome Swyer?
The ICD-10-CM index points "Syndrome Swyer" to Q99.1, 46, XX true hermaphrodite. Q99.1 is a billable code.
Is Q99.1 billable?
Yes. Q99.1 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What chapter is Q99.1 in?
Chapter 17. Congenital malformations and chromosomal abnormalities.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.