Code edition

UpcomingOct 1, 2026 – Sep 30, 2027

D12.1UpcomingBillable / specific

Benign neoplasm of appendix

Code-level instructions

Excludes 1

benign carcinoid tumor of the appendix (D3A.020)

Excludes 2 · 2

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

Excludes 2

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

Claims & coverage

Coverage depends on the payer, service and applicable policy. A billable code does not guarantee payment.

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

Check Medicare coverage ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2024

ChangedUnchanged

FY2024

Effective from 2023-10-01

Inherited rules changed

Benign neoplasm of appendix

Billable diagnosis code

CDC/NCHS · FY2024

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	No tabular change
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	Inherited rules changed
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	Inherited rules changed
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Historical ICD-9 mappings · 2018

Historical mapping only; not an automatic code substitution.

211.3 · Approximate

CDC/NCHS · GEM 2018

Code-level instructions

Excludes 1

benign carcinoid tumor of the appendix (D3A.020)

Inherited instructions

Chapters 2 · Neoplasms (C00-D49)

Note

Functional activity
All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
Morphology [Histology]
Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
Primary malignant neoplasms overlapping site boundaries
A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
Malignant neoplasm of ectopic tissue
Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

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

Excludes 2

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

Official index references (2)

Neoplasm, neoplastic (2)

Neoplasm, neoplastic › appendixNeoplasms
Neoplasm, neoplastic › intestine, intestinal › large › appendixNeoplasms

Related codes

Other entries in the same category; these are not automatic substitutes.

Code	Description	Category · further specificity required
D12.0	Benign neoplasm of cecum	Billable / specific
D12.2	Benign neoplasm of ascending colon	Billable / specific
D12.3	Benign neoplasm of transverse colon	Billable / specific
D12.4	Benign neoplasm of descending colon	Billable / specific
D12.5	Benign neoplasm of sigmoid colon	Billable / specific
D12.6	Benign neoplasm of colon, unspecified	Billable / specific
D12.7	Benign neoplasm of rectosigmoid junction	Billable / specific
D12.8	Benign neoplasm of rectum	Billable / specific
D12.9	Benign neoplasm of anus and anal canal	Billable / specific

Official titles and instructions are preserved in their source language. Official sources ↗

D12.1UpcomingBillable / specific

Benign neoplasm of appendix

Code-level instructions

Excludes 1

benign carcinoid tumor of the appendix (D3A.020)

Excludes 2 · 2

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

Excludes 2

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

Claims & coverage

Coverage depends on the payer, service and applicable policy. A billable code does not guarantee payment.

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Official coding guidelines → · CMS ↗

Check Medicare coverage ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2024

ChangedUnchanged

FY2024

Effective from 2023-10-01

Inherited rules changed

Benign neoplasm of appendix

Billable diagnosis code

CDC/NCHS · FY2024

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	No tabular change
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	Inherited rules changed
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	Inherited rules changed
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Historical ICD-9 mappings · 2018

Historical mapping only; not an automatic code substitution.

211.3 · Approximate

CDC/NCHS · GEM 2018

Code-level instructions

Excludes 1

benign carcinoid tumor of the appendix (D3A.020)

Inherited instructions

Chapters 2 · Neoplasms (C00-D49)

Note

Functional activity
All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
Morphology [Histology]
Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
Primary malignant neoplasms overlapping site boundaries
A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
Malignant neoplasm of ectopic tissue
Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

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

Excludes 2

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

Official index references (2)

Neoplasm, neoplastic (2)

Neoplasm, neoplastic › appendixNeoplasms
Neoplasm, neoplastic › intestine, intestinal › large › appendixNeoplasms

Related codes

Other entries in the same category; these are not automatic substitutes.

Code	Description	Category · further specificity required
D12.0	Benign neoplasm of cecum	Billable / specific
D12.2	Benign neoplasm of ascending colon	Billable / specific
D12.3	Benign neoplasm of transverse colon	Billable / specific
D12.4	Benign neoplasm of descending colon	Billable / specific
D12.5	Benign neoplasm of sigmoid colon	Billable / specific
D12.6	Benign neoplasm of colon, unspecified	Billable / specific
D12.7	Benign neoplasm of rectosigmoid junction	Billable / specific
D12.8	Benign neoplasm of rectum	Billable / specific
D12.9	Benign neoplasm of anus and anal canal	Billable / specific

Official titles and instructions are preserved in their source language. Official sources ↗