D02.21 ICD-10-CM Code: Carcinoma in situ of right bronchus and lung
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FY 2026 Apr update / Neoplasms (C00-D49) / In situ neoplasms (D00-D09)
D02.21
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCarcinoma in situ of right bronchus and lung
This code describes abnormal cells found in the right lung or bronchus (airway) that have the potential to become cancer but have not yet invaded deeper tissues. It represents an early stage where cancer cells are present only in the surface lining and have not spread.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for D02.21 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D02.21 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D02.21 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for D02.21 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D02.21 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D02.21 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D02.21 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is D02.21 an HCC code?
No. D02.21 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
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
D02.21 is the ICD-10-CM diagnosis code for carcinoma in situ of right bronchus and lung. This code describes abnormal cells found in the right lung or bronchus (airway) that have the potential to become cancer but have not yet invaded deeper tissues. It represents an early stage where cancer cells are present only in the surface lining and have not spread. D02.21 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering in situ neoplasms (d00-d09).
D02.21 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.
Ensure laterality is documented as right side; if bilateral or left-sided lesions are present, use separate codes D02.11 or D02.12.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D02.21 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.