Q33.1

Billable

ChapterQ00–Q99

Ranksubcategory

Official Description

Accessory lobe of lung

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

Instructional Notes

Includes

Azygos lobe (fissured), lung

General instructions are available for the parent sections:

View CH17 Notes

Clinical Hierarchy

CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Q30-Q34Congenital malformations of the respiratory system (Q30-Q34)

Q33Congenital malformations of lung

Q33.1Accessory lobe of lung

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q33.1:

chapterCH17

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to Q33.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths

Accessory (congenital)1 unique routes

lung (lobe)→Q33.1

Azygos1 unique routes

lobe (lung)→Q33.1

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 205

Other Respiratory System Diagnoses with MCC

DRG 206

Other Respiratory System Diagnoses without MCC

Cross Reference

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