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D13.99

D13.99Benign neoplasm of ill-defined sites within the digestive system

Billable / specific codeICD-10-CM

D13.99 is a billable, specific ICD-10-CM code for benign neoplasm of ill-defined sites within the digestive system. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Benign neoplasm of digestive system NOS
  • Benign neoplasm of intestine NOS
  • Benign neoplasm of spleen

Risk adjustment

D13.99 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

D13.99 is named in 8 Medicare coverage policies 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56531Billing and Coding: Octreotide Acetate for Injectable Suspension (Sandostatin® LAR Depot)
  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
  • A56695Billing and Coding: Implantable Infusion Pump
  • A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy

Related codes at this level

Codes that share D13.9. If D13.99 is not quite right, the correct code is usually one of these.

Questions about D13.99

Is D13.99 a billable ICD-10-CM code?
Yes. D13.99 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does D13.99 sit in the tabular list?
Neoplasms (C00-D49), in the block Benign neoplasms, except benign neuroendocrine tumors (D10-D36).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.