| S80.21 | Abrasion of knee | NON-BILLABLE CODE |
| S80.211 | Abrasion, right knee | NON-BILLABLE CODE |
| S80.211A | Abrasion, right knee, initial encounter | BILLABLE CODE |
| S80.211D | Abrasion, right knee, subsequent encounter | BILLABLE CODE |
| S80.211S | Abrasion, right knee, sequela | BILLABLE CODE |
| S80.212 | Abrasion, left knee | NON-BILLABLE CODE |
| S80.212A | Abrasion, left knee, initial encounter | BILLABLE CODE |
| S80.212D | Abrasion, left knee, subsequent encounter | BILLABLE CODE |
| S80.212S | Abrasion, left knee, sequela | BILLABLE CODE |
| S80.219 | Abrasion, unspecified knee | NON-BILLABLE CODE |
| S80.219A | Abrasion, unspecified knee, initial encounter | BILLABLE CODE |
| S80.219D | Abrasion, unspecified knee, subsequent encounter | BILLABLE CODE |
| S80.219S | Abrasion, unspecified knee, sequela | BILLABLE CODE |
| S80.22 | Blister (nonthermal) of knee | NON-BILLABLE CODE |
| S80.221 | Blister (nonthermal), right knee | NON-BILLABLE CODE |
| S80.221A | Blister (nonthermal), right knee, initial encounter | BILLABLE CODE |
| S80.221D | Blister (nonthermal), right knee, subsequent encounter | BILLABLE CODE |
| S80.221S | Blister (nonthermal), right knee, sequela | BILLABLE CODE |
| S80.222 | Blister (nonthermal), left knee | NON-BILLABLE CODE |
| S80.222A | Blister (nonthermal), left knee, initial encounter | BILLABLE CODE |
| S80.222D | Blister (nonthermal), left knee, subsequent encounter | BILLABLE CODE |
| S80.222S | Blister (nonthermal), left knee, sequela | BILLABLE CODE |
| S80.229 | Blister (nonthermal), unspecified knee | NON-BILLABLE CODE |
| S80.229A | Blister (nonthermal), unspecified knee, initial encounter | BILLABLE CODE |
| S80.229D | Blister (nonthermal), unspecified knee, subsequent encounter | BILLABLE CODE |
| S80.229S | Blister (nonthermal), unspecified knee, sequela | BILLABLE CODE |
| S80.24 | External constriction of knee | NON-BILLABLE CODE |
| S80.241 | External constriction, right knee | NON-BILLABLE CODE |
| S80.241A | External constriction, right knee, initial encounter | BILLABLE CODE |
| S80.241D | External constriction, right knee, subsequent encounter | BILLABLE CODE |
| S80.241S | External constriction, right knee, sequela | BILLABLE CODE |
| S80.242 | External constriction, left knee | NON-BILLABLE CODE |
| S80.242A | External constriction, left knee, initial encounter | BILLABLE CODE |
| S80.242D | External constriction, left knee, subsequent encounter | BILLABLE CODE |
| S80.242S | External constriction, left knee, sequela | BILLABLE CODE |
| S80.249 | External constriction, unspecified knee | NON-BILLABLE CODE |
| S80.249A | External constriction, unspecified knee, initial encounter | BILLABLE CODE |
| S80.249D | External constriction, unspecified knee, subsequent encounter | BILLABLE CODE |
| S80.249S | External constriction, unspecified knee, sequela | BILLABLE CODE |
| S80.25 | Superficial foreign body of knee | NON-BILLABLE CODE |
| S80.251 | Superficial foreign body, right knee | NON-BILLABLE CODE |
| S80.251A | Superficial foreign body, right knee, initial encounter | BILLABLE CODE |
| S80.251D | Superficial foreign body, right knee, subsequent encounter | BILLABLE CODE |
| S80.251S | Superficial foreign body, right knee, sequela | BILLABLE CODE |
| S80.252 | Superficial foreign body, left knee | NON-BILLABLE CODE |
| S80.252A | Superficial foreign body, left knee, initial encounter | BILLABLE CODE |
| S80.252D | Superficial foreign body, left knee, subsequent encounter | BILLABLE CODE |
| S80.252S | Superficial foreign body, left knee, sequela | BILLABLE CODE |
| S80.259 | Superficial foreign body, unspecified knee | NON-BILLABLE CODE |
| S80.259A | Superficial foreign body, unspecified knee, initial encounter | BILLABLE CODE |
| S80.259D | Superficial foreign body, unspecified knee, subsequent encounter | BILLABLE CODE |
| S80.259S | Superficial foreign body, unspecified knee, sequela | BILLABLE CODE |
| S80.26 | Insect bite (nonvenomous) of knee | NON-BILLABLE CODE |
| S80.261 | Insect bite (nonvenomous), right knee | NON-BILLABLE CODE |
| S80.261A | Insect bite (nonvenomous), right knee, initial encounter | BILLABLE CODE |
| S80.261D | Insect bite (nonvenomous), right knee, subsequent encounter | BILLABLE CODE |
| S80.261S | Insect bite (nonvenomous), right knee, sequela | BILLABLE CODE |
| S80.262 | Insect bite (nonvenomous), left knee | NON-BILLABLE CODE |
| S80.262A | Insect bite (nonvenomous), left knee, initial encounter | BILLABLE CODE |
| S80.262D | Insect bite (nonvenomous), left knee, subsequent encounter | BILLABLE CODE |
| S80.262S | Insect bite (nonvenomous), left knee, sequela | BILLABLE CODE |
| S80.269 | Insect bite (nonvenomous), unspecified knee | NON-BILLABLE CODE |
| S80.269A | Insect bite (nonvenomous), unspecified knee, initial encounter | BILLABLE CODE |
| S80.269D | Insect bite (nonvenomous), unspecified knee, subsequent encounter | BILLABLE CODE |
| S80.269S | Insect bite (nonvenomous), unspecified knee, sequela | BILLABLE CODE |
| S80.27 | Other superficial bite of knee | NON-BILLABLE CODE |
| S80.271 | Other superficial bite of right knee | NON-BILLABLE CODE |
| S80.271A | Other superficial bite of right knee, initial encounter | BILLABLE CODE |
| S80.271D | Other superficial bite of right knee, subsequent encounter | BILLABLE CODE |
| S80.271S | Other superficial bite of right knee, sequela | BILLABLE CODE |
| S80.272 | Other superficial bite of left knee | NON-BILLABLE CODE |
| S80.272A | Other superficial bite of left knee, initial encounter | BILLABLE CODE |
| S80.272D | Other superficial bite of left knee, subsequent encounter | BILLABLE CODE |
| S80.272S | Other superficial bite of left knee, sequela | BILLABLE CODE |
| S80.279 | Other superficial bite of unspecified knee | NON-BILLABLE CODE |
| S80.279A | Other superficial bite of unspecified knee, initial encounter | BILLABLE CODE |
| S80.279D | Other superficial bite of unspecified knee, subsequent encounter | BILLABLE CODE |
| S80.279S | Other superficial bite of unspecified knee, sequela | BILLABLE CODE |
