| S81.00 | Unspecified open wound of knee | NON-BILLABLE CODE |
| S81.001 | Unspecified open wound, right knee | NON-BILLABLE CODE |
| S81.001A | Unspecified open wound, right knee, initial encounter | BILLABLE CODE |
| S81.001D | Unspecified open wound, right knee, subsequent encounter | BILLABLE CODE |
| S81.001S | Unspecified open wound, right knee, sequela | BILLABLE CODE |
| S81.002 | Unspecified open wound, left knee | NON-BILLABLE CODE |
| S81.002A | Unspecified open wound, left knee, initial encounter | BILLABLE CODE |
| S81.002D | Unspecified open wound, left knee, subsequent encounter | BILLABLE CODE |
| S81.002S | Unspecified open wound, left knee, sequela | BILLABLE CODE |
| S81.009 | Unspecified open wound, unspecified knee | NON-BILLABLE CODE |
| S81.009A | Unspecified open wound, unspecified knee, initial encounter | BILLABLE CODE |
| S81.009D | Unspecified open wound, unspecified knee, subsequent encounter | BILLABLE CODE |
| S81.009S | Unspecified open wound, unspecified knee, sequela | BILLABLE CODE |
| S81.01 | Laceration without foreign body of knee | NON-BILLABLE CODE |
| S81.011 | Laceration without foreign body, right knee | NON-BILLABLE CODE |
| S81.011A | Laceration without foreign body, right knee, initial encounter | BILLABLE CODE |
| S81.011D | Laceration without foreign body, right knee, subsequent encounter | BILLABLE CODE |
| S81.011S | Laceration without foreign body, right knee, sequela | BILLABLE CODE |
| S81.012 | Laceration without foreign body, left knee | NON-BILLABLE CODE |
| S81.012A | Laceration without foreign body, left knee, initial encounter | BILLABLE CODE |
| S81.012D | Laceration without foreign body, left knee, subsequent encounter | BILLABLE CODE |
| S81.012S | Laceration without foreign body, left knee, sequela | BILLABLE CODE |
| S81.019 | Laceration without foreign body, unspecified knee | NON-BILLABLE CODE |
| S81.019A | Laceration without foreign body, unspecified knee, initial encounter | BILLABLE CODE |
| S81.019D | Laceration without foreign body, unspecified knee, subsequent encounter | BILLABLE CODE |
| S81.019S | Laceration without foreign body, unspecified knee, sequela | BILLABLE CODE |
| S81.02 | Laceration with foreign body of knee | NON-BILLABLE CODE |
| S81.021 | Laceration with foreign body, right knee | NON-BILLABLE CODE |
| S81.021A | Laceration with foreign body, right knee, initial encounter | BILLABLE CODE |
| S81.021D | Laceration with foreign body, right knee, subsequent encounter | BILLABLE CODE |
| S81.021S | Laceration with foreign body, right knee, sequela | BILLABLE CODE |
| S81.022 | Laceration with foreign body, left knee | NON-BILLABLE CODE |
| S81.022A | Laceration with foreign body, left knee, initial encounter | BILLABLE CODE |
| S81.022D | Laceration with foreign body, left knee, subsequent encounter | BILLABLE CODE |
| S81.022S | Laceration with foreign body, left knee, sequela | BILLABLE CODE |
| S81.029 | Laceration with foreign body, unspecified knee | NON-BILLABLE CODE |
| S81.029A | Laceration with foreign body, unspecified knee, initial encounter | BILLABLE CODE |
| S81.029D | Laceration with foreign body, unspecified knee, subsequent encounter | BILLABLE CODE |
| S81.029S | Laceration with foreign body, unspecified knee, sequela | BILLABLE CODE |
| S81.03 | Puncture wound without foreign body of knee | NON-BILLABLE CODE |
| S81.031 | Puncture wound without foreign body, right knee | NON-BILLABLE CODE |
| S81.031A | Puncture wound without foreign body, right knee, initial encounter | BILLABLE CODE |
| S81.031D | Puncture wound without foreign body, right knee, subsequent encounter | BILLABLE CODE |
| S81.031S | Puncture wound without foreign body, right knee, sequela | BILLABLE CODE |
| S81.032 | Puncture wound without foreign body, left knee | NON-BILLABLE CODE |
| S81.032A | Puncture wound without foreign body, left knee, initial encounter | BILLABLE CODE |
| S81.032D | Puncture wound without foreign body, left knee, subsequent encounter | BILLABLE CODE |
| S81.032S | Puncture wound without foreign body, left knee, sequela | BILLABLE CODE |
| S81.039 | Puncture wound without foreign body, unspecified knee | NON-BILLABLE CODE |
| S81.039A | Puncture wound without foreign body, unspecified knee, initial encounter | BILLABLE CODE |
| S81.039D | Puncture wound without foreign body, unspecified knee, subsequent encounter | BILLABLE CODE |
| S81.039S | Puncture wound without foreign body, unspecified knee, sequela | BILLABLE CODE |
| S81.04 | Puncture wound with foreign body of knee | NON-BILLABLE CODE |
| S81.041 | Puncture wound with foreign body, right knee | NON-BILLABLE CODE |
| S81.041A | Puncture wound with foreign body, right knee, initial encounter | BILLABLE CODE |
| S81.041D | Puncture wound with foreign body, right knee, subsequent encounter | BILLABLE CODE |
| S81.041S | Puncture wound with foreign body, right knee, sequela | BILLABLE CODE |
| S81.042 | Puncture wound with foreign body, left knee | NON-BILLABLE CODE |
| S81.042A | Puncture wound with foreign body, left knee, initial encounter | BILLABLE CODE |
| S81.042D | Puncture wound with foreign body, left knee, subsequent encounter | BILLABLE CODE |
| S81.042S | Puncture wound with foreign body, left knee, sequela | BILLABLE CODE |
| S81.049 | Puncture wound with foreign body, unspecified knee | NON-BILLABLE CODE |
| S81.049A | Puncture wound with foreign body, unspecified knee, initial encounter | BILLABLE CODE |
| S81.049D | Puncture wound with foreign body, unspecified knee, subsequent encounter | BILLABLE CODE |
| S81.049S | Puncture wound with foreign body, unspecified knee, sequela | BILLABLE CODE |
| S81.05 | Open bite of knee | NON-BILLABLE CODE |
| S81.051 | Open bite, right knee | NON-BILLABLE CODE |
| S81.051A | Open bite, right knee, initial encounter | BILLABLE CODE |
| S81.051D | Open bite, right knee, subsequent encounter | BILLABLE CODE |
| S81.051S | Open bite, right knee, sequela | BILLABLE CODE |
| S81.052 | Open bite, left knee | NON-BILLABLE CODE |
| S81.052A | Open bite, left knee, initial encounter | BILLABLE CODE |
| S81.052D | Open bite, left knee, subsequent encounter | BILLABLE CODE |
| S81.052S | Open bite, left knee, sequela | BILLABLE CODE |
| S81.059 | Open bite, unspecified knee | NON-BILLABLE CODE |
| S81.059A | Open bite, unspecified knee, initial encounter | BILLABLE CODE |
| S81.059D | Open bite, unspecified knee, subsequent encounter | BILLABLE CODE |
| S81.059S | Open bite, unspecified knee, sequela | BILLABLE CODE |
