ICD-10-CM 2027
ICD-10 code for long bones adamantinoma
Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb
From the official ICD-10-CM alphabetic index entry “Adamantinoma › long bones”. Page updated September 29, 2026.
About coding long bones adamantinoma
The ICD-10-CM code for long bones adamantinoma is C40.90 (Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on C40.90.
Within C40.9, choose C40.90 (unspecified limb) only when documentation doesn't support a more specific option: right limb (C40.91) and left limb (C40.92).
Use an additional code to identify major osseous defect, if applicable (M89.7-).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific long bones adamantinoma codes (official index)
Common questions about long bones adamantinoma ICD-10 codes
What is the ICD-10 code for long bones adamantinoma?
- C40.90 — Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb. More specific codes apply when the documentation supports them: C40.2, C40.0.
What is the ICD-10 code for lower limb long bones adamantinoma?
- C40.2 — Malignant neoplasm of long bones of lower limb (header code; choose a more specific subcode).
What is the ICD-10 code for upper limb long bones adamantinoma?
- C40.0 — Malignant neoplasm of scapula and long bones of upper limb (header code; choose a more specific subcode).
Is C40.90 billable?
- Yes. C40.90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can C40.90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict C40.90 as a principal diagnosis.
Is C40.90 a CC or MCC?
- C40.90 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.