Q39.9 — Congenital malformation of esophagus, unspecified

BillableUnspecifiedCC

Is Q39.9 billable?

Yes, but Q39.9 is an unspecified code. Q39.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Q39.9 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 Q39.9 — the more specific alternatives are listed below.

More specific alternatives

Q39.9 at a glance

Code	Q39.9
Description	Congenital malformation of esophagus, unspecified
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does Q39.9 group to?

Q39.9 sits in MDC 06 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

368Major Esophageal Disorders with MCCmedical
369Major Esophageal Disorders with CCmedical
370Major Esophageal Disorders without CC/MCCmedical

As a secondary diagnosis, Q39.9 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is Q39.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Q39.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

Anomaly, anomalous › esophagus (congenital) (unspecified type)
Defect, defective › esophagus, congenital
Deformity › esophagus
Malformation › esophagus (congenital)

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q39.9, but a patient may have both at the same time. When documentation supports it, Q39.9 and the excluded code may both be reported.

inborn errors of metabolism (E70-E88)

How long has Q39.9 existed?

Q39.9 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.