D3A.8: Other benign neuroendocrine tumors
D3A.8, other benign neuroendocrine tumors, is listed as a covered diagnosis in 3 Medicare billing and coding articles that apply to 13 HCPCS Level II codes, including G0105 (Colorectal cancer screening; colonoscopy on individual at…), G9998 (Documentation of medical reason(s) for an interval of less…), G9999 (Documentation of system reason(s) for an interval of less…). The articles come from 1 Medicare contractor. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.
HCPCS Level II codes with D3A.8 as a covered diagnosis
| Code | Description | Medicare coverage | DMEPOS fee 2026 (state range) | Articles listing it |
|---|---|---|---|---|
| G0105 | Colorectal cancer screening; colonoscopy on individual at high risk | Special coverage instructions apply | — | 1 |
| G9998 | Documentation of medical reason(s) for an interval of less than 3 years since the last colonoscopy (e.g., last colonoscopy incomplete, last colonoscopy had inadequate prep, piecemeal removal of adenomas, or sessile serrated polyps >= 20 mm in size, last colonoscopy found greater than 10 adenomas, lower gastrointestinal bleeding, or patient at high risk for colon cancer due to underlying medical history ([i.e. crohn's disease, ulcerative colitis, personal or family history of colon cancer, hereditary colorectal cancer syndromes]) | Carrier judgment | — | 1 |
| G9999 | Documentation of system reason(s) for an interval of less than 3 years since the last colonoscopy (e.g., unable to locate previous colonoscopy report, patient cannot provide precise date or details from previous colonoscopy, previous colonoscopy report was incomplete) | Carrier judgment | — | 1 |
| J0585 | Injection, onabotulinumtoxina, 1 unit | Special coverage instructions apply | — | 1 |
| G2187 | Patients with clinical indications for imaging of the head: head trauma | Carrier judgment | — | 1 |
| G2188 | Patients with clinical indications for imaging of the head: new or change in headache above 50 years of age | Carrier judgment | — | 1 |
| G2189 | Patients with clinical indications for imaging of the head: abnormal neurologic exam | Carrier judgment | — | 1 |
| G2190 | Patients with clinical indications for imaging of the head: headache radiating to the neck | Carrier judgment | — | 1 |
| G2191 | Patients with clinical indications for imaging of the head: positional headaches | Carrier judgment | — | 1 |
| G2192 | Patients with clinical indications for imaging of the head: temporal headaches in patients over 55 years of age | Carrier judgment | — | 1 |
| G2193 | Patients with clinical indications for imaging of the head: new onset headache in pre-school children or younger (<6 years of age) | Carrier judgment | — | 1 |
| G2194 | Patients with clinical indications for imaging of the head: new onset headache in pediatric patients with disabilities for which headache is a concern as inferred from behavior | Carrier judgment | — | 1 |
| G2195 | Patients with clinical indications for imaging of the head: occipital headache in children | Carrier judgment | — | 1 |
Medicare policy articles listing D3A.8
- A56632: Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy (Palmetto GBA (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L34005, L34454
- A56389: Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization (Palmetto GBA (MAC - Part A, MAC - Part B); 1 Level II codes). LCD with the same title: L34434
- A56612: Billing and Coding: CT of the Head (Palmetto GBA (MAC - Part A, MAC - Part B); 9 Level II codes). LCD with the same title: L34417
A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.
Frequently asked questions
Does Medicare cover D3A.8 (Other benign neuroendocrine tumors)?
Medicare covers items and services, not diagnoses. 3 Medicare billing and coding articles list D3A.8 as a covered diagnosis for 13 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.
Which HCPCS codes can be billed with ICD-10 D3A.8?
The Level II codes from the policies most specific to this diagnosis are G0105 (Colorectal cancer screening; colonoscopy on individual at…, 1 article); G9998 (Documentation of medical reason(s) for an interval of less…, 1 article); G9999 (Documentation of system reason(s) for an interval of less…, 1 article); J0585 (Injection, onabotulinumtoxina, 1 unit, 1 article); G2187 (Patients with clinical indications for imaging of the…, 1 article). Code choice depends on the item supplied; check each code's descriptor.
Which Medicare policy articles list D3A.8?
A56632 (Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy); A56389 (Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization); A56612 (Billing and Coding: CT of the Head).
What is ICD-10-CM code D3A.8?
D3A.8 is the ICD-10-CM code for other benign neuroendocrine tumors, in category D3A (Benign neuroendocrine tumors), chapter 2: Neoplasms.
Next steps
- Run a reimbursement report for a device billed under G0105
- Watch G0105 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G0105
Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.