2027 ICD-10-CM Diagnosis Code Q26.2Total anomalous pulmonary venous connection

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q26

ICD-10-CM Q26.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q26.2 is a billable ICD-10-CM diagnosis code for total anomalous pulmonary venous connection. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 306 through 307. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 7 closely related codes. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cardiac and circulatory congenital anomalies.

Q26.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 191 for payment year 2027.

Code Identity

ICD-10-CM Code
Q26.2
Billable Status
Yes — Valid for Submission
Code Describes
Total anomalous pulmonary venous connection
Short Description
Total anomalous pulmonary venous connection
Same as the full description in the CMS dataset.
Parent Code
Q26
Congenital malformations of great veins

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ20-Q28Congenital malformations of the circulatory system
CategoryQ26Congenital malformations of great veins
This CodeQ26.2Total anomalous pulmonary venous connection

Present on Admission (POA)Billing

Q26.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Congenital malformations of the circulatory system (Q20-Q28).

Medicare Risk Adjustment (HCC)Billing

Q26.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
RxHCC 191 — Ventricular Septal Defect and Major Congenital Heart Disorders
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anomalous pulmonary venous connection of mixed type
  • Divided left atrium with all pulmonary veins to proximal chamber and then to left atrium
  • Divided left atrium with all pulmonary veins to proximal chamber and then to left atrium with additional pulmonary venous chamber communication to right atrium
  • Infracardiac location of anomalous pulmonary venous connection
  • Infracardiac location of anomalous pulmonary venous connection to hepatic vein
  • Intracardiac location of anomalous pulmonary venous connection
  • Intracardiac location of anomalous pulmonary venous connection to coronary sinus
  • Intracardiac location of anomalous pulmonary venous connection to right atrium
  • Subdiaphragmatic total anomalous pulmonary venous return
  • Supracardiac location of anomalous pulmonary venous connection
  • Supradiaphragmatic total anomalous pulmonary venous return
  • Total anomalous pulmonary venous connection of infracardiac type
  • Total anomalous pulmonary venous connection of intracardiac type
  • Total anomalous pulmonary venous connection of supracardiac type
  • Total anomalous pulmonary venous connection to coronary sinus
  • Total anomalous pulmonary venous connection to hepatic vein
  • Total anomalous pulmonary venous connection to right atrium
  • Total anomalous pulmonary venous connection to superior vena cava
  • Total anomalous pulmonary venous connections of mixed type
  • Total anomalous pulmonary venous return

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q26.2: its own notes plus those printed at Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Total anomalous pulmonary venous return [TAPVR], subdiaphragmatic
  • Total anomalous pulmonary venous return [TAPVR], supradiaphragmatic

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL001
Cardiac and circulatory congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Congenital Heart Defects

Congenital heart defects (CHDs) are problems with the structure of the heart. "Congenital" means that that the problems are present at birth. These defects happen when a fetus's heart doesn't develop normally during pregnancy. Congenital heart defects are the most common type of birth defect.

The full article covers:

  • What are congenital heart defects?
  • What causes congenital heart defects?
  • Who is more likely to have a baby with a congenital heart defect?
  • What are the symptoms of congenital heart defects?
  • What other problems do congenital heart defects cause?
  • How are congenital heart defects diagnosed?
  • What are the treatments for congenital heart defects?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Q26.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
747.41 Tot anom pulm ven connec
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q26.2Overview

What is the ICD-10 code for total anomalous pulmonary venous connection?

The ICD-10-CM code for total anomalous pulmonary venous connection is Q26.2 (sometimes written as Q262). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is Q26.2 (Congenital malformations of great veins) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report total anomalous pulmonary venous connection on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does Q26.2 group to?

When total anomalous pulmonary venous connection is the principal diagnosis on an inpatient stay, it groups to MS-DRG 306, 307, with relative weights from 0.9146 to 1.5457 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q26.2 a CC or MCC?

CMS lists Q26.2 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 7 closely related codes in its exclusion list.

Is Q26.2 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for total anomalous pulmonary venous connection on inpatient claims. The code appears in the Congenital malformations of the circulatory system (Q20-Q28) range of the CMS exempt list.

Does Q26.2 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: Q26.2 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 191 (Ventricular Septal Defect and Major Congenital Heart Disorders).