| B977 | Papillomavirus as the cause of diseases classified elsewhere Papillomavirus as the cause of diseases classified elsewhere |
| B978 | Other viral agents as the cause of diseases classified elsewhere |
| B9781 | Human metapneumovirus as the cause of diseases classd elswhr Human metapneumovirus as the cause of diseases classified elsewhere |
| B9789 | Other viral agents as the cause of diseases classified elsewhere |
| B99 | Other and unspecified infectious diseases |
| B998 | Other infectious disease |
| B999 | Unspecified infectious disease |
| C00 | Malignant neoplasm of lip |
| C000 | Malignant neoplasm of external upper lip |
| C001 | Malignant neoplasm of external lower lip |
| C002 | Malignant neoplasm of external lip, unspecified |
| C003 | Malignant neoplasm of upper lip, inner aspect |
| C004 | Malignant neoplasm of lower lip, inner aspect |
| C005 | Malignant neoplasm of lip, unspecified, inner aspect |
| C006 | Malignant neoplasm of commissure of lip, unspecified |
| C008 | Malignant neoplasm of overlapping sites of lip |
| C009 | Malignant neoplasm of lip, unspecified |
| C01 | Malignant neoplasm of base of tongue |
| C02 | Malignant neoplasm of other and unspecified parts of tongue |
| C020 | Malignant neoplasm of dorsal surface of tongue |
| C021 | Malignant neoplasm of border of tongue |
| C022 | Malignant neoplasm of ventral surface of tongue |
| C023 | Malignant neoplasm of anterior two-thirds of tongue, part unspecified |
| C024 | Malignant neoplasm of lingual tonsil |
| C028 | Malignant neoplasm of overlapping sites of tongue |
| C029 | Malignant neoplasm of tongue, unspecified |
| C03 | Malignant neoplasm of gum |
| C030 | Malignant neoplasm of upper gum |
| C031 | Malignant neoplasm of lower gum |
| C039 | Malignant neoplasm of gum, unspecified |
| C04 | Malignant neoplasm of floor of mouth |
| C040 | Malignant neoplasm of anterior floor of mouth |
| C041 | Malignant neoplasm of lateral floor of mouth |
| C048 | Malignant neoplasm of overlapping sites of floor of mouth |
| C049 | Malignant neoplasm of floor of mouth, unspecified |
| C05 | Malignant neoplasm of palate |
| C050 | Malignant neoplasm of hard palate |
| C051 | Malignant neoplasm of soft palate |
| C052 | Malignant neoplasm of uvula |
| C058 | Malignant neoplasm of overlapping sites of palate |
| C059 | Malignant neoplasm of palate, unspecified |
| C06 | Malignant neoplasm of other and unspecified parts of mouth |
| C060 | Malignant neoplasm of cheek mucosa |
| C061 | Malignant neoplasm of vestibule of mouth |
| C062 | Malignant neoplasm of retromolar area |
| C068 | Malignant neoplasm of ovrlp sites of and unsp parts of mouth Malignant neoplasm of overlapping sites of other and unspecified parts of mouth |
| C0680 | Malignant neoplasm of overlapping sites of unspecified parts of mouth |
| C0689 | Malignant neoplasm of overlapping sites of other parts of mouth |
| C069 | Malignant neoplasm of mouth, unspecified |
| C07 | Malignant neoplasm of parotid gland |