Q99.0 — Chimera 46, XX/46, XY
Is Q99.0 billable?
Yes — Q99.0 is billable for FY2027. Q99.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Q99.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Q99.0 at a glance
| Code | Q99.0 |
|---|---|
| Description | Chimera 46, XX/46, XY |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Q99.0 group to?
Q99.0 sits in MDC 12 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 729Other Male Reproductive System Diagnoses with CC/MCCmedical
- 730Other Male Reproductive System Diagnoses without CC/MCCmedical
How is Q99.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Q99.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Chimera 46,XX/46,XY
- Hermaphrodite, hermaphroditism › 46,XX/46,XY (true)
- Hermaphrodite, hermaphroditism › chimera 46,XX/46,XY (true)
Inclusion terms
Alternative wording in documentation that is classified to Q99.0.
- Chimera 46, XX/46, XY true hermaphrodite
Excludes2 — not included here — inherited from Chapter 17
The conditions below are not part of Q99.0, but a patient may have both at the same time. When documentation supports it, Q99.0 and the excluded code may both be reported.
- inborn errors of metabolism (E70-E88)
Excludes2 — not included here — inherited from Q90-Q99
The conditions below are not part of Q99.0, but a patient may have both at the same time. When documentation supports it, Q99.0 and the excluded code may both be reported.
- mitochondrial metabolic disorders (E88.4-)
How long has Q99.0 existed?
Q99.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with Q99.0?
ICD-10-CM declares these codes mutually exclusive with Q99.0 — exactly one of each pair can be correct for a given encounter.