C00-D49
Neoplasms
Chapter coding notes
Blocks in this chapter
C00-C14
Malignant neoplasms of lip, oral cavity and pharynx
C15-C26
Malignant neoplasms of digestive organs
C30-C39
Malignant neoplasms of respiratory and intrathoracic organs
C40-C41
Malignant neoplasms of bone and articular cartilage
C43-C44
Melanoma and other malignant neoplasms of skin
C45-C49
Malignant neoplasms of mesothelial and soft tissue
C50
Malignant neoplasms of breast
C51-C58
Malignant neoplasms of female genital organs
C60-C63
Malignant neoplasms of male genital organs
C64-C68
Malignant neoplasms of urinary tract
C69-C72
Malignant neoplasms of eye, brain and other parts of central nervous system
C73-C75
Malignant neoplasms of thyroid and other endocrine glands
C76-C80
Malignant neoplasms of ill-defined, other secondary and unspecified sites
C7A
Malignant neuroendocrine tumors
C7B
Secondary neuroendocrine tumors
C81-C96
Malignant neoplasms of lymphoid, hematopoietic and related tissue
D00-D09
In situ neoplasms
D10-D36
Benign neoplasms, except benign neuroendocrine tumors
D37-D48
Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
D3A
Benign neuroendocrine tumors
D49
Neoplasms of unspecified behavior
Official Guidelines for Chapter 2
FY 2026 ›Subsections
- I.C.2.aAdmission/Encounter for treatment of primary site
- I.C.2.bAdmission/Encounter for treatment of secondary site
- I.C.2.cCoding and sequencing of complications
- I.C.2.dPrimary malignancy previously excised
- I.C.2.eAdmissions/Encounters involving antineoplastic chemotherapy, immunotherapy and radiation therapy
- I.C.2.fAdmission/encounter to determine extent of malignancy
- I.C.2.gSymptoms, signs, and abnormal findings listed in Chapter 18 associated with neoplasms
- I.C.2.hAdmission/encounter for pain control/management
- I.C.2.iMalignancy in two or more noncontiguous sites
- I.C.2.jDisseminated malignant neoplasm, unspecified
- I.C.2.kMalignant neoplasm without specification of site
- I.C.2.lSequencing of neoplasm codes
- I.C.2.mCurrent malignancy versus personal history of malignancy
- I.C.2.nLeukemia, Multiple Myeloma, and Malignant Plasma Cell
- I.C.2.oAftercare following surgery for neoplasm
- I.C.2.pFollow-up care for completed treatment of a malignancy
- I.C.2.qProphylactic organ removal for prevention of malignancy
- I.C.2.rMalignant neoplasm associated with transplanted organ
- I.C.2.sBreast Implant Associated Anaplastic Large Cell Lymphoma
- I.C.2.tSecondary malignant neoplasm of lymphoid tissue
Sections that reference codes in Chapter 2
- I.C.2.jDisseminated malignant neoplasm, unspecifiedC80.0
- I.C.2.kMalignant neoplasm without specification of siteC80.1
- I.C.2.nLeukemia, Multiple Myeloma, and Malignant Plasma CellC90
- I.C.2.rMalignant neoplasm associated with transplanted organC80.2
- I.C.2.sBreast Implant Associated Anaplastic Large Cell LymphomaC84.7A
- I.C.2.tSecondary malignant neoplasm of lymphoid tissueC81-C85