D09.21
✓ Billable
Carcinoma in situ of right eye
ICD-10-CM · FY2026 · Neoplasms
Code
D09.21
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Neoplasms
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 D09.21?
ICD-10-CM code D09.21 represents Carcinoma in situ of right eye. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is D09.21 billable?
Yes. D09.21 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is D09.21 in?
D09.21 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the D09 category
D09
Carcinoma in situ of other and unspecified sites
Non-billable
D09.0
Carcinoma in situ of bladder
Billable
D09.1
Carcinoma in situ of other and unspecified urinary organs
Non-billable
D09.2
Carcinoma in situ of eye
Non-billable
D09.3
Carcinoma in situ of thyroid and other endocrine glands
Billable
D09.8
Carcinoma in situ of other specified sites
Billable
D09.9
Carcinoma in situ, unspecified
Billable
D09.10
Carcinoma in situ of unspecified urinary organ
Billable
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