D12.1 is the authoritative medical code for Benign neoplasm of appendix. This classification is used in medical billing and clinical recording to specify the clinical criteria for benign neoplasm of appendix (ICD-10-CM D12.1), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Benign neoplasm of appendix is a billable ICD-10-CM diagnosis code D12.1. Excludes1 (not coded here): benign carcinoid tumor of the appendix D3A.020. Excludes2 (not included here): benign carcinoid tumors of the large intestine and rectum D3A.02-; polyp of colon NOS K63.5.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for D12.1 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- benign carcinoid tumor of the appendix D3A.020
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- benign carcinoid tumors of the large intestine and rectum D3A.02-
- polyp of colon NOS K63.5
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with D12.1?
Per Excludes1 instructions, D12.1 must not be reported with: benign carcinoid tumor of the appendix (D3A.020).
Can D12.1 be reported alongside related conditions?
Per Excludes2 instructions, D12.1 and the following may both be reported when both are present: benign carcinoid tumors of the large intestine and rectum (D3A.02-); polyp of colon NOS (K63.5).
Codes in This Family (10)
Official ICD-10-CM classifications in the same code family as D12.1, with their registry titles.
- D12 — Benign neoplasm of colon, rectum, anus and anal canal
- D12.0 — Benign neoplasm of cecum
- D12.2 — Benign neoplasm of ascending colon
- D12.3 — Benign neoplasm of transverse colon
- D12.4 — Benign neoplasm of descending colon
- D12.5 — Benign neoplasm of sigmoid colon
- D12.6 — Benign neoplasm of colon, unspecified
- D12.7 — Benign neoplasm of rectosigmoid junction
- D12.8 — Benign neoplasm of rectum
- D12.9 — Benign neoplasm of anus and anal canal
Neoplasm Table Sites (2)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, appendix — Benign
- Neoplasm, neoplastic, intestine, intestinal, large, appendix — Benign
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code D09.1
Carcinoma in situ of other and unspecified urinary organs
ICD Code D17.1
Benign lipomatous neoplasm of skin and subcutaneous tissue of trunk