D16.21
✓ BillableBenign neoplasm of long bones of right lower limb
Neoplasms (C00-D49)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • benign neoplasm of connective tissue of ear (D21.0)
- • benign neoplasm of connective tissue of eyelid (D21.0)
- • benign neoplasm of connective tissue of larynx (D14.1)
- • benign neoplasm of connective tissue of nose (D14.0)
- • benign neoplasm of synovia (D21.-)
Clinical Description
ICD-10-CM code D16.21 represents benign neoplasm of long bones of right lower limb. This code falls under the Neoplasms (C00-D49) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory. Coders should note that D16.21 has 5 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code D16.21?
ICD-10-CM code D16.21 is "Benign neoplasm of long bones of right lower limb". It belongs to the category: Neoplasms (C00-D49).
Is D16.21 a billable ICD-10 code?
Yes, D16.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with D16.21?
D16.21 has 5 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in D16.2
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)