| M1A.161 | Lead-induced chronic gout, right knee | NON-BILLABLE CODE |
| M1A.1610 | Lead-induced chronic gout, right knee, without tophus (tophi) | BILLABLE CODE |
| M1A.1611 | Lead-induced chronic gout, right knee, with tophus (tophi) | BILLABLE CODE |
| M1A.162 | Lead-induced chronic gout, left knee | NON-BILLABLE CODE |
| M1A.1620 | Lead-induced chronic gout, left knee, without tophus (tophi) | BILLABLE CODE |
| M1A.1621 | Lead-induced chronic gout, left knee, with tophus (tophi) | BILLABLE CODE |
| M1A.169 | Lead-induced chronic gout, unspecified knee | NON-BILLABLE CODE |
| M1A.1690 | Lead-induced chronic gout, unspecified knee, without tophus (tophi) | BILLABLE CODE |
| M1A.1691 | Lead-induced chronic gout, unspecified knee, with tophus (tophi) | BILLABLE CODE |
