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Dx

ICD-10-CM 2027

ICD-10 code for tibial ameloblastoma

C40.2

Malignant neoplasm of long bones of lower limb

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Ameloblastoma › tibial”. Page updated September 29, 2026.

About coding tibial ameloblastoma

The ICD-10-CM code for tibial ameloblastoma is C40.2 (Malignant neoplasm of long bones of lower limb).

Within C40 (malignant neoplasm of bone and articular cartilage of limbs), C40.2 is specifically for malignant neoplasm of long bones of lower limb. Related codes cover scapula and long bones of upper limb (C40.0), short bones of upper limb (C40.1), short bones of lower limb (C40.3), overlapping sites of bone and articular cartilage of limb (C40.8) and unspecified bones and articular cartilage of limb (C40.9).

To report this condition, pick the subcode that matches the documentation: C40.20 (limb), C40.21 (limb) and C40.22 (limb).

Use an additional code to identify major osseous defect, if applicable (M89.7-).

Common questions about tibial ameloblastoma ICD-10 codes

What is the ICD-10 code for tibial ameloblastoma?

C40.2 — Malignant neoplasm of long bones of lower limb (a header code; report a more specific subcode).

Is C40.2 billable?

No. C40.2 is a header code. Report one of its more specific subcodes instead.