Q33.1 — Accessory lobe of lung
Q33.1 is a billable, specific ICD-10-CM code for accessory lobe of lung. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Azygos lobe (fissured), lung
Risk adjustment
Q33.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
Q33.1 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
How Q33.1 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q33.1.
- Accessory›lung(lobe)
- Azygos›lobe(lung)
Related codes at this level
Codes that share Q33. If Q33.1 is not quite right, the correct code is usually one of these.
Questions about Q33.1
- Is Q33.1 a billable ICD-10-CM code?
- Yes. Q33.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q33.1 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the respiratory system (Q30-Q34).