C ICD-10-CM Categories: Category Index
Browse 91 top-level ICD-10-CM categories beginning with C, then follow their complete FY 2027 child-code hierarchies.
Categories beginning with C
Open a category to continue through its complete hierarchy of more specific codes.
C00Malignant neoplasm of lipC01Malignant neoplasm of base of tongueC02Malignant neoplasm of other and unspecified parts of tongueC03Malignant neoplasm of gumC04Malignant neoplasm of floor of mouthC05Malignant neoplasm of palateC06Malignant neoplasm of other and unspecified parts of mouthC07Malignant neoplasm of parotid glandC08Malignant neoplasm of other and unspecified major salivary glandsC09Malignant neoplasm of tonsilC10Malignant neoplasm of oropharynxC11Malignant neoplasm of nasopharynxC12Malignant neoplasm of pyriform sinusC13Malignant neoplasm of hypopharynxC14Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynxC15Malignant neoplasm of esophagusC16Malignant neoplasm of stomachC17Malignant neoplasm of small intestineC18Malignant neoplasm of colonC19Malignant neoplasm of rectosigmoid junctionC20Malignant neoplasm of rectumC21Malignant neoplasm of anus and anal canalC22Malignant neoplasm of liver and intrahepatic bile ductsC23Malignant neoplasm of gallbladderC24Malignant neoplasm of other and unspecified parts of biliary tractC25Malignant neoplasm of pancreasC26Malignant neoplasm of other and ill-defined digestive organsC30Malignant neoplasm of nasal cavity and middle earC31Malignant neoplasm of accessory sinusesC32Malignant neoplasm of larynxC33Malignant neoplasm of tracheaC34Malignant neoplasm of bronchus and lungC37Malignant neoplasm of thymusC38Malignant neoplasm of heart, mediastinum and pleuraC39Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organsC40Malignant neoplasm of bone and articular cartilage of limbsC41Malignant neoplasm of bone and articular cartilage of other and unspecified sitesC43Malignant melanoma of skinC44Other and unspecified malignant neoplasm of skinC45MesotheliomaC46Kaposi's sarcomaC47Malignant neoplasm of peripheral nerves and autonomic nervous systemC48Malignant neoplasm of retroperitoneum and peritoneumC49Malignant neoplasm of other connective and soft tissueC4AMerkel cell carcinomaC50Malignant neoplasm of breastC51Malignant neoplasm of vulvaC52Malignant neoplasm of vaginaC53Malignant neoplasm of cervix uteriC54Malignant neoplasm of corpus uteriC55Malignant neoplasm of uterus, part unspecifiedC56Malignant neoplasm of ovaryC57Malignant neoplasm of other and unspecified female genital organsC58Malignant neoplasm of placentaC60Malignant neoplasm of penisC61Malignant neoplasm of prostateC62Malignant neoplasm of testisC63Malignant neoplasm of other and unspecified male genital organsC64Malignant neoplasm of kidney, except renal pelvisC65Malignant neoplasm of renal pelvisC66Malignant neoplasm of ureterC67Malignant neoplasm of bladderC68Malignant neoplasm of other and unspecified urinary organsC69Malignant neoplasm of eye and adnexaC70Malignant neoplasm of meningesC71Malignant neoplasm of brainC72Malignant neoplasm of spinal cord, cranial nerves and other parts of central nervous systemC73Malignant neoplasm of thyroid glandC74Malignant neoplasm of adrenal glandC75Malignant neoplasm of other endocrine glands and related structuresC76Malignant neoplasm of other and ill-defined sitesC77Secondary and unspecified malignant neoplasm of lymph nodesC78Secondary malignant neoplasm of respiratory and digestive organsC79Secondary malignant neoplasm of other and unspecified sitesC7AMalignant neuroendocrine tumorsC7BSecondary neuroendocrine tumorsC80Malignant neoplasm without specification of siteC81Hodgkin lymphomaC82Follicular lymphomaC83Non-follicular lymphomaC84Mature T/NK-cell lymphomasC85Other specified and unspecified types of non-Hodgkin lymphomaC86Other specified types of T/NK-cell lymphomaC88Malignant immunoproliferative diseases and certain other B-cell lymphomasC90Multiple myeloma and malignant plasma cell neoplasmsC91Lymphoid leukemiaC92Myeloid leukemiaC93Monocytic leukemiaC94Other leukemias of specified cell typeC95Leukemia of unspecified cell typeC96Other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissueSource and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This category index is generated from Vero’s repository-backed ICD-10-CM hierarchy. Every listed category is a top-level record, and each linked category page exposes its direct child codes.
Frequently asked questions
Which ICD-10-CM categories begin with C?
This index lists 91 top-level categories beginning with C from Vero’s FY 2027 U.S. ICD-10-CM reference dataset.
How do I find a more specific C code?
Open a category below, then follow its linked child-code hierarchy until you reach the code supported by the documentation.
Which ICD-10-CM release does this C index use?
The index uses the FY 2027 U.S. ICD-10-CM release and the repository-backed hierarchy displayed on each linked code page.
Is every C category billable?
No. These are top-level categories used for navigation. Follow the hierarchy to a sufficiently specific code and confirm the active code set, official guidance, and payer requirements.