ICD-10-CM 2027
ICD-10 code for Chimera 46
From the official ICD-10-CM alphabetic index entry “Chimera 46,XX/46,XY”. Page updated September 29, 2026.
About coding Chimera 46
The ICD-10-CM code for Chimera 46 is Q99.0 (Chimera 46, XX/46, XY).
Within Q99 (other chromosome abnormalities, not elsewhere classified), Q99.0 is specifically for Chimera 46, XX/46, XY. Related codes cover 46, XX true hermaphrodite (Q99.1), fragile X chromosome (Q99.2), other specified chromosome abnormalities (Q99.8) and chromosomal abnormality, unspecified (Q99.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 729 (Other Male Reproductive System Diagnoses with CC/MCC, relative weight 1.0544), DRG 730 (Other Male Reproductive System Diagnoses without CC/MCC, relative weight 0.6597), DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC, relative weight 1.8456), DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC, relative weight 1.2974), DRG 760 (Menstrual and Other Female Reproductive System Disorders with CC/MCC, relative weight 1.0129) and DRG 761 (Menstrual and Other Female Reproductive System Disorders without CC/MCC, relative weight 0.7041), in MDC 12 (Diseases and Disorders of the Male Reproductive System) and MDC 13 (Diseases and Disorders of the Female Reproductive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Chimera 46 ICD-10 codes
What is the ICD-10 code for Chimera 46?
- Q99.0 — Chimera 46, XX/46, XY.
Is Q99.0 billable?
- Yes. Q99.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q99.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q99.0 as a principal diagnosis.
Is Q99.0 a CC or MCC?
- No. Q99.0 is neither a CC nor an MCC under MS-DRG v44.0.