Q51.9 — Congenital malformation of uterus and cervix, unspecified

BillableUnspecified

Is Q51.9 billable?

Yes, but Q51.9 is an unspecified code. Q51.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Q51.9 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 Q51.9 — the more specific alternatives are listed below.

More specific alternatives

Q51.9 at a glance

Code	Q51.9
Description	Congenital malformation of uterus and cervix, unspecified
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does Q51.9 group to?

Q51.9 sits in MDC 13 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.

742Uterine and Adnexa Procedures for Non-Malignancy with CC/MCCsurgical
743Uterine and Adnexa Procedures for Non-Malignancy without CC/MCCsurgical

How is Q51.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Q51.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

Anomaly, anomalous › cervix (congenital) (unspecified type)
Anomaly, anomalous › uterus (congenital) (unspecified type)
Deformity › uterus
Distortion › cervix (s) (congenital)
Distortion › uterus (s) (congenital)
Malformation › cervix uteri (congenital)
Malformation › uterus (congenital)
Deformity › cervixNEC › congenital

Excludes1 — never code together — inherited from Q50-Q56

The conditions below can never be reported together with Q51.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

androgen insensitivity syndrome (E34.5-)
syndromes associated with anomalies in the number and form of chromosomes (Q90-Q99)

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q51.9, but a patient may have both at the same time. When documentation supports it, Q51.9 and the excluded code may both be reported.

inborn errors of metabolism (E70-E88)

How long has Q51.9 existed?

Q51.9 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.

Which conditions are coded to Q51.9?

ICD-10 code for Anomaly