ICDcodes.org
FY2027

Q98.9 — Sex chromosome abnormality, male phenotype, unspecified

BillableUnspecified

Is Q98.9 billable?

Yes, but Q98.9 is an unspecified code. Q98.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Q98.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting Q98.9 — the more specific alternatives are listed below.

Q98.9 at a glance

CodeQ98.9
DescriptionSex chromosome abnormality, male phenotype, unspecified
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does Q98.9 group to?

Q98.9 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 Q98.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Q98.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Anomaly, anomalous › sex chromosomes NEC › male phenotype (congenital) (unspecified type)
  • Abnormal, abnormality, abnormalities › chromosome, chromosomal › sex › male phenotype
  • Anomaly, anomalous › chromosomes, chromosomal › sex › male phenotype (congenital) (unspecified type)
  • Syndrome › due to abnormality › chromosomal › sex › male phenotype

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q98.9, but a patient may have both at the same time. When documentation supports it, Q98.9 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 Q98.9, but a patient may have both at the same time. When documentation supports it, Q98.9 and the excluded code may both be reported.

  • mitochondrial metabolic disorders (E88.4-)

How long has Q98.9 existed?

Q98.9 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.

What other codes are in the Q98 family? (8)