Collaborative Stage for TNM 7 - Revised 11/12/2010 [ Schema ]
| Code | Description |
| 010 | Clark level I In situ, intraepidermal, intraepithelial, noninvasive Basement membrane of epidermis is intact |
| 020 | Clark level II Papillary dermis invaded |
| 030 | Clark level III Papillary-reticular dermal interface invaded |
| 040 | Clark level IV Reticular dermis invaded |
| 050 | Clark level V Subcutaneous tissue invaded (through entire dermis) |
| 988 | Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code 988 may result in an edit error.) |
| 998 | No histologic examination of primary site |
| 999 | Unknown Clark level or no information Not documented in patient record |