| M20.00 | Unspecified deformity of finger(s) | NON-BILLABLE CODE |
| M20.001 | Unspecified deformity of right finger(s) | BILLABLE CODE |
| M20.002 | Unspecified deformity of left finger(s) | BILLABLE CODE |
| M20.009 | Unspecified deformity of unspecified finger(s) | BILLABLE CODE |
| M20.01 | Mallet finger | NON-BILLABLE CODE |
| M20.011 | Mallet finger of right finger(s) | BILLABLE CODE |
| M20.012 | Mallet finger of left finger(s) | BILLABLE CODE |
| M20.019 | Mallet finger of unspecified finger(s) | BILLABLE CODE |
| M20.02 | Boutonniere deformity | NON-BILLABLE CODE |
| M20.021 | Boutonniere deformity of right finger(s) | BILLABLE CODE |
| M20.022 | Boutonniere deformity of left finger(s) | BILLABLE CODE |
| M20.029 | Boutonniere deformity of unspecified finger(s) | BILLABLE CODE |
| M20.03 | Swan-neck deformity | NON-BILLABLE CODE |
| M20.031 | Swan-neck deformity of right finger(s) | BILLABLE CODE |
| M20.032 | Swan-neck deformity of left finger(s) | BILLABLE CODE |
| M20.039 | Swan-neck deformity of unspecified finger(s) | BILLABLE CODE |
| M20.09 | Other deformity of finger(s) | NON-BILLABLE CODE |
| M20.091 | Other deformity of right finger(s) | BILLABLE CODE |
| M20.092 | Other deformity of left finger(s) | BILLABLE CODE |
| M20.099 | Other deformity of finger(s), unspecified finger(s) | BILLABLE CODE |
