Q26.1 — Persistent left superior vena cava

BillableCC

Is Q26.1 billable?

Yes — Q26.1 is billable for FY2027. Q26.1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Q26.1 may be submitted for encounters from October 1, 2026 through September 30, 2027.

Q26.1 at a glance

Code	Q26.1
Description	Persistent left superior vena cava
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does Q26.1 group to?

Q26.1 sits in MDC 05 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.

306Cardiac Congenital and Valvular Disorders with MCCmedical
307Cardiac Congenital and Valvular Disorders without MCCmedical

As a secondary diagnosis, Q26.1 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is Q26.1 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Q26.1. They show the wording a clinician may have documented, which often differs from the Tabular description.

Persistence, persistent › left › superior vena cava (congenital)
Malformation › great › vein › persistent left superior vena cava (congenital)

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q26.1, but a patient may have both at the same time. When documentation supports it, Q26.1 and the excluded code may both be reported.

inborn errors of metabolism (E70-E88)

How long has Q26.1 existed?

Q26.1 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.