Q33.1
✓ Billable
Accessory lobe of lung
ICD-10-CM · FY2026 · Congenital Malformations, Deformations and Chromosomal Abnormalities
Code
Q33.1
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Congenital Malformations, Deformations and Chromosomal Abnormalities
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Q33.1?
ICD-10-CM code Q33.1 represents Accessory lobe of lung. It is a billable diagnosis code in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective October 1, 2025 – September 30, 2026.
Is Q33.1 billable?
Yes. Q33.1 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is Q33.1 in?
Q33.1 belongs to the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter (Q00–Q99) of ICD-10-CM.
Related codes in the Q33 category
Q33
Congenital malformations of lung
Non-billable
Q33.0
Congenital cystic lung
Billable
Q33.2
Sequestration of lung
Billable
Q33.3
Agenesis of lung
Billable
Q33.4
Congenital bronchiectasis
Billable
Q33.5
Ectopic tissue in lung
Billable
Q33.6
Congenital hypoplasia and dysplasia of lung
Billable
Q33.8
Other congenital malformations of lung
Billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →