D12.1 – Benign neoplasm of appendix

ICD-10-CM 2027 diagnosis code · Benign neoplasms, except benign neuroendocrine tumors

Billable code

ICD-10-CM code D12.1

Code: D12.1 (claims format: D121)
Description: Benign neoplasm of appendix
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: D10-D36 Benign neoplasms, except benign neuroendocrine tumors
Parent codes: D12

Notes for D12.1

Excludes1 (not coded here):

benign carcinoid tumor of the appendix (D3A.020)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

D12 – Benign neoplasm of colon, rectum, anus and anal canal

Excludes2 (not included here):

benign carcinoid tumors of the large intestine and rectum (D3A.02-)
polyp of colon NOS (K63.5)

Related codes in D12

D12.0 – Benign neoplasm of cecumBillable
D12.2 – Benign neoplasm of ascending colonBillable
D12.3 – Benign neoplasm of transverse colonBillable
D12.4 – Benign neoplasm of descending colonBillable
D12.5 – Benign neoplasm of sigmoid colonBillable
D12.6 – Benign neoplasm of colon, unspecifiedBillable
D12.7 – Benign neoplasm of rectosigmoid junctionBillable
D12.8 – Benign neoplasm of rectumBillable
D12.9 – Benign neoplasm of anus and anal canalBillable

Frequently asked questions

What is ICD-10 code D12.1?

D12.1 is the ICD-10-CM code for benign neoplasm of appendix, in the block D10-D36 (Benign neoplasms, except benign neuroendocrine tumors).

Is D12.1 a billable code?

Yes. D12.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does D12.1 belong to?

It belongs to category D12 – Benign neoplasm of colon, rectum, anus and anal canal.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.