Q33.0 ICD-10-CM Code: Congenital cystic lung
Q33.0 is not a CMS-HCC payment code. MEAT criteria · RAF calculator · HCC coding software
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FY 2026 Apr update / Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0) / Congenital malformations of the respiratory system (Q30-Q34)
Q33.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCongenital cystic lung
A birth defect where the lung contains one or more fluid-filled sacs (cysts) instead of normal lung tissue, which may affect breathing and oxygen exchange.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Congenital cystic lung disease
- Congenital honeycomb lung
- Congenital polycystic lung disease
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Q33.0 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Q33.0 in this effective period.
Excludes 1
Official- cystic fibrosis (E84.0)
- cystic lung disease, acquired or unspecified (J98.4)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Q33.0 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Q33.0 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Q33.0 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is Q33.0 an HCC code?
No. Q33.0 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Q33.0
- Description
- Congenital cystic lung
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Q33.0 is the ICD-10-CM diagnosis code for congenital cystic lung. A birth defect where the lung contains one or more fluid-filled sacs (cysts) instead of normal lung tissue, which may affect breathing and oxygen exchange. Q33.0 sits in the ICD-10-CM chapter for congenital malformations, deformations and chromosomal abnormalities (q00-qa0), within the section covering congenital malformations of the respiratory system (q30-q34).
Q33.0 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Congenital cystic lung may require imaging confirmation; ensure radiology reports are reviewed.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Q33.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Congenital cystic lung may require imaging confirmation; ensure radiology reports are reviewed
- •Code any associated respiratory complications or infections separately