Question 1

What is ICD-10 code D49.89?

Accepted Answer

D49.89 is the ICD-10-CM diagnosis code for neoplasm of unspecified behavior of other specified sites. A tumor or growth in other body sites (not previously listed) whose behavior cannot be determined from available information. D49.89 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering neoplasms of unspecified behavior (d49).

D49.89 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

Document the specific anatomical site in the medical record to support coding accuracy.

Question 2

Is D49.89 an HCC code?

Accepted Answer

D49.89 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

Question 3

Is D49.89 billable?

Accepted Answer

Yes. D49.89 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. D49.89 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Question 4

Which HCC does D49.89 map to under V28?

Accepted Answer

D49.89 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

Question 5

What RAF reference is published for D49.89?

Accepted Answer

D49.89 has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

Question 6

What is the V28 vs V24 difference for D49.89?

Accepted Answer

D49.89 has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

Question 7

What documentation supports D49.89?

Accepted Answer

Document the specific anatomical site in the medical record to support coding accuracy Review the complete pathology report to ensure the behavior truly cannot be determined before using this code D49.89 is not a CMS-HCC V28 payment code in the verified current source, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

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D49.89

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D49.89 ICD-10-CM Code: Neoplasm of unspecified behavior of other specified sites

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D49.89

Is D49.89 an HCC code?

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What This Code Means

Coding Tips

Child Codes

Code Hierarchy

Work D49.89 in HCC Buddy