ICD-10 · PDGM grouping
S81 Open wound of knee and lower leg
All 108 codes in the S81 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
108
Can lead a claim
72
Cannot lead a claim
36
What CMS assigns to S81
72 of the 108 codes group to Wound; 36 are assigned no clinical group. None of the 108 is assigned a comorbidity subgroup. 72 of the 108 can lead a claim.
Every code in S81
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| S81.0 Open wound of knee | ||||
| S81.00 Unspecified open wound of knee | ||||
| S81.001 Unspecified open wound, right knee | ||||
| S81.001A | Unspecified open wound, right knee, initial encounter | Can lead a claim | C | None |
| S81.001D | Unspecified open wound, right knee, subsequent encounter | Can lead a claim | C | None |
| S81.001S | Unspecified open wound, right knee, sequela | Can lead a claim | C | None |
| S81.002 Unspecified open wound, left knee | ||||
| S81.002A | Unspecified open wound, left knee, initial encounter | Can lead a claim | C | None |
| S81.002D | Unspecified open wound, left knee, subsequent encounter | Can lead a claim | C | None |
| S81.002S | Unspecified open wound, left knee, sequela | Can lead a claim | C | None |
| S81.009 Unspecified open wound, unspecified knee | ||||
| S81.009A | Unspecified open wound, unspecified knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.009D | Unspecified open wound, unspecified knee, subsequent encounterCMS: Unspecified open wound, unspecified knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.009S | Unspecified open wound, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.01 Laceration without foreign body of knee | ||||
| S81.011 Laceration without foreign body, right knee | ||||
| S81.011A | Laceration without foreign body, right knee, initial encounterCMS: Laceration without foreign body, right knee, init encntr | Can lead a claim | C | None |
| S81.011D | Laceration without foreign body, right knee, subsequent encounterCMS: Laceration without foreign body, right knee, subs encntr | Can lead a claim | C | None |
| S81.011S | Laceration without foreign body, right knee, sequela | Can lead a claim | C | None |
| S81.012 Laceration without foreign body, left knee | ||||
| S81.012A | Laceration without foreign body, left knee, initial encounterCMS: Laceration without foreign body, left knee, init encntr | Can lead a claim | C | None |
| S81.012D | Laceration without foreign body, left knee, subsequent encounterCMS: Laceration without foreign body, left knee, subs encntr | Can lead a claim | C | None |
| S81.012S | Laceration without foreign body, left knee, sequela | Can lead a claim | C | None |
| S81.019 Laceration without foreign body, unspecified knee | ||||
| S81.019A | Laceration without foreign body, unspecified knee, initial encounterCMS: Laceration without foreign body, unsp knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.019D | Laceration without foreign body, unspecified knee, subsequent encounterCMS: Laceration without foreign body, unsp knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.019S | Laceration without foreign body, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.02 Laceration with foreign body of knee | ||||
| S81.021 Laceration with foreign body, right knee | ||||
| S81.021A | Laceration with foreign body, right knee, initial encounter | Can lead a claim | C | None |
| S81.021D | Laceration with foreign body, right knee, subsequent encounterCMS: Laceration with foreign body, right knee, subs encntr | Can lead a claim | C | None |
| S81.021S | Laceration with foreign body, right knee, sequela | Can lead a claim | C | None |
| S81.022 Laceration with foreign body, left knee | ||||
| S81.022A | Laceration with foreign body, left knee, initial encounter | Can lead a claim | C | None |
| S81.022D | Laceration with foreign body, left knee, subsequent encounterCMS: Laceration with foreign body, left knee, subs encntr | Can lead a claim | C | None |
| S81.022S | Laceration with foreign body, left knee, sequela | Can lead a claim | C | None |
| S81.029 Laceration with foreign body, unspecified knee | ||||
| S81.029A | Laceration with foreign body, unspecified knee, initial encounterCMS: Laceration with foreign body, unspecified knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.029D | Laceration with foreign body, unspecified knee, subsequent encounterCMS: Laceration with foreign body, unspecified knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.029S | Laceration with foreign body, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.03 Puncture wound without foreign body of knee | ||||
| S81.031 Puncture wound without foreign body, right knee | ||||
| S81.031A | Puncture wound without foreign body, right knee, initial encounterCMS: Puncture wound without foreign body, right knee, init encntr | Can lead a claim | C | None |
| S81.031D | Puncture wound without foreign body, right knee, subsequent encounterCMS: Puncture wound without foreign body, right knee, subs encntr | Can lead a claim | C | None |
| S81.031S | Puncture wound without foreign body, right knee, sequela | Can lead a claim | C | None |
| S81.032 Puncture wound without foreign body, left knee | ||||
| S81.032A | Puncture wound without foreign body, left knee, initial encounterCMS: Puncture wound without foreign body, left knee, init encntr | Can lead a claim | C | None |
| S81.032D | Puncture wound without foreign body, left knee, subsequent encounterCMS: Puncture wound without foreign body, left knee, subs encntr | Can lead a claim | C | None |
| S81.032S | Puncture wound without foreign body, left knee, sequela | Can lead a claim | C | None |
| S81.039 Puncture wound without foreign body, unspecified knee | ||||
| S81.039A | Puncture wound without foreign body, unspecified knee, initial encounterCMS: Puncture wound without foreign body, unsp knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.039D | Puncture wound without foreign body, unspecified knee, subsequent encounterCMS: Puncture wound without foreign body, unsp knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.039S | Puncture wound without foreign body, unspecified knee, sequelaCMS: Puncture wound without foreign body, unsp knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.04 Puncture wound with foreign body of knee | ||||
| S81.041 Puncture wound with foreign body, right knee | ||||
| S81.041A | Puncture wound with foreign body, right knee, initial encounterCMS: Puncture wound with foreign body, right knee, init encntr | Can lead a claim | C | None |
| S81.041D | Puncture wound with foreign body, right knee, subsequent encounterCMS: Puncture wound with foreign body, right knee, subs encntr | Can lead a claim | C | None |
| S81.041S | Puncture wound with foreign body, right knee, sequela | Can lead a claim | C | None |
| S81.042 Puncture wound with foreign body, left knee | ||||
| S81.042A | Puncture wound with foreign body, left knee, initial encounterCMS: Puncture wound with foreign body, left knee, init encntr | Can lead a claim | C | None |
| S81.042D | Puncture wound with foreign body, left knee, subsequent encounterCMS: Puncture wound with foreign body, left knee, subs encntr | Can lead a claim | C | None |
| S81.042S | Puncture wound with foreign body, left knee, sequela | Can lead a claim | C | None |
| S81.049 Puncture wound with foreign body, unspecified knee | ||||
| S81.049A | Puncture wound with foreign body, unspecified knee, initial encounterCMS: Puncture wound with foreign body, unsp knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.049D | Puncture wound with foreign body, unspecified knee, subsequent encounterCMS: Puncture wound with foreign body, unsp knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.049S | Puncture wound with foreign body, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.05 Open bite of knee | ||||
| S81.051 Open bite, right knee | ||||
| S81.051A | Open bite, right knee, initial encounter | Can lead a claim | C | None |
| S81.051D | Open bite, right knee, subsequent encounter | Can lead a claim | C | None |
| S81.051S | Open bite, right knee, sequela | Can lead a claim | C | None |
| S81.052 Open bite, left knee | ||||
| S81.052A | Open bite, left knee, initial encounter | Can lead a claim | C | None |
| S81.052D | Open bite, left knee, subsequent encounter | Can lead a claim | C | None |
| S81.052S | Open bite, left knee, sequela | Can lead a claim | C | None |
| S81.059 Open bite, unspecified knee | ||||
| S81.059A | Open bite, unspecified knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.059D | Open bite, unspecified knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.059S | Open bite, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.8 Open wound of lower leg | ||||
| S81.80 Unspecified open wound of lower leg | ||||
| S81.801 Unspecified open wound, right lower leg | ||||
| S81.801A | Unspecified open wound, right lower leg, initial encounter | Can lead a claim | C | None |
| S81.801D | Unspecified open wound, right lower leg, subsequent encounterCMS: Unspecified open wound, right lower leg, subs encntr | Can lead a claim | C | None |
| S81.801S | Unspecified open wound, right lower leg, sequela | Can lead a claim | C | None |
| S81.802 Unspecified open wound, left lower leg | ||||
| S81.802A | Unspecified open wound, left lower leg, initial encounter | Can lead a claim | C | None |
| S81.802D | Unspecified open wound, left lower leg, subsequent encounter | Can lead a claim | C | None |
| S81.802S | Unspecified open wound, left lower leg, sequela | Can lead a claim | C | None |
| S81.809 Unspecified open wound, unspecified lower leg | ||||
| S81.809A | Unspecified open wound, unspecified lower leg, initial encounterCMS: Unspecified open wound, unspecified lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.809D | Unspecified open wound, unspecified lower leg, subsequent encounterCMS: Unspecified open wound, unspecified lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.809S | Unspecified open wound, unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.81 Laceration without foreign body of lower leg | ||||
| S81.811 Laceration without foreign body, right lower leg | ||||
| S81.811A | Laceration without foreign body, right lower leg, initial encounterCMS: Laceration w/o foreign body, right lower leg, init encntr | Can lead a claim | C | None |
| S81.811D | Laceration without foreign body, right lower leg, subsequent encounterCMS: Laceration w/o foreign body, right lower leg, subs encntr | Can lead a claim | C | None |
| S81.811S | Laceration without foreign body, right lower leg, sequela | Can lead a claim | C | None |
| S81.812 Laceration without foreign body, left lower leg | ||||
| S81.812A | Laceration without foreign body, left lower leg, initial encounterCMS: Laceration without foreign body, left lower leg, init encntr | Can lead a claim | C | None |
| S81.812D | Laceration without foreign body, left lower leg, subsequent encounterCMS: Laceration without foreign body, left lower leg, subs encntr | Can lead a claim | C | None |
| S81.812S | Laceration without foreign body, left lower leg, sequela | Can lead a claim | C | None |
| S81.819 Laceration without foreign body, unspecified lower leg | ||||
| S81.819A | Laceration without foreign body, unspecified lower leg, initial encounterCMS: Laceration without foreign body, unsp lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.819D | Laceration without foreign body, unspecified lower leg, subsequent encounterCMS: Laceration without foreign body, unsp lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.819S | Laceration without foreign body, unspecified lower leg, sequelaCMS: Laceration without foreign body, unsp lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.82 Laceration with foreign body of lower leg | ||||
| S81.821 Laceration with foreign body, right lower leg | ||||
| S81.821A | Laceration with foreign body, right lower leg, initial encounterCMS: Laceration with foreign body, right lower leg, init encntr | Can lead a claim | C | None |
| S81.821D | Laceration with foreign body, right lower leg, subsequent encounterCMS: Laceration with foreign body, right lower leg, subs encntr | Can lead a claim | C | None |
| S81.821S | Laceration with foreign body, right lower leg, sequela | Can lead a claim | C | None |
| S81.822 Laceration with foreign body, left lower leg | ||||
| S81.822A | Laceration with foreign body, left lower leg, initial encounterCMS: Laceration with foreign body, left lower leg, init encntr | Can lead a claim | C | None |
| S81.822D | Laceration with foreign body, left lower leg, subsequent encounterCMS: Laceration with foreign body, left lower leg, subs encntr | Can lead a claim | C | None |
| S81.822S | Laceration with foreign body, left lower leg, sequela | Can lead a claim | C | None |
| S81.829 Laceration with foreign body, unspecified lower leg | ||||
| S81.829A | Laceration with foreign body, unspecified lower leg, initial encounterCMS: Laceration with foreign body, unsp lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.829D | Laceration with foreign body, unspecified lower leg, subsequent encounterCMS: Laceration with foreign body, unsp lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.829S | Laceration with foreign body, unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.83 Puncture wound without foreign body of lower leg | ||||
| S81.831 Puncture wound without foreign body, right lower leg | ||||
| S81.831A | Puncture wound without foreign body, right lower leg, initial encounterCMS: Puncture wound w/o foreign body, right lower leg, init | Can lead a claim | C | None |
| S81.831D | Puncture wound without foreign body, right lower leg, subsequent encounterCMS: Puncture wound w/o foreign body, right lower leg, subs | Can lead a claim | C | None |
| S81.831S | Puncture wound without foreign body, right lower leg, sequelaCMS: Puncture wound w/o foreign body, right lower leg, sequela | Can lead a claim | C | None |
| S81.832 Puncture wound without foreign body, left lower leg | ||||
| S81.832A | Puncture wound without foreign body, left lower leg, initial encounterCMS: Puncture wound w/o foreign body, left lower leg, init encntr | Can lead a claim | C | None |
| S81.832D | Puncture wound without foreign body, left lower leg, subsequent encounterCMS: Puncture wound w/o foreign body, left lower leg, subs encntr | Can lead a claim | C | None |
| S81.832S | Puncture wound without foreign body, left lower leg, sequela | Can lead a claim | C | None |
| S81.839 Puncture wound without foreign body, unspecified lower leg | ||||
| S81.839A | Puncture wound without foreign body, unspecified lower leg, initial encounterCMS: Puncture wound w/o foreign body, unsp lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.839D | Puncture wound without foreign body, unspecified lower leg, subsequent encounterCMS: Puncture wound w/o foreign body, unsp lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.839S | Puncture wound without foreign body, unspecified lower leg, sequelaCMS: Puncture wound without foreign body, unsp lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.84 Puncture wound with foreign body of lower leg | ||||
| S81.841 Puncture wound with foreign body, right lower leg | ||||
| S81.841A | Puncture wound with foreign body, right lower leg, initial encounterCMS: Puncture wound w foreign body, right lower leg, init encntr | Can lead a claim | C | None |
| S81.841D | Puncture wound with foreign body, right lower leg, subsequent encounterCMS: Puncture wound w foreign body, right lower leg, subs encntr | Can lead a claim | C | None |
| S81.841S | Puncture wound with foreign body, right lower leg, sequela | Can lead a claim | C | None |
| S81.842 Puncture wound with foreign body, left lower leg | ||||
| S81.842A | Puncture wound with foreign body, left lower leg, initial encounterCMS: Puncture wound w foreign body, left lower leg, init encntr | Can lead a claim | C | None |
| S81.842D | Puncture wound with foreign body, left lower leg, subsequent encounterCMS: Puncture wound w foreign body, left lower leg, subs encntr | Can lead a claim | C | None |
| S81.842S | Puncture wound with foreign body, left lower leg, sequela | Can lead a claim | C | None |
| S81.849 Puncture wound with foreign body, unspecified lower leg | ||||
| S81.849A | Puncture wound with foreign body, unspecified lower leg, initial encounterCMS: Puncture wound w foreign body, unsp lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.849D | Puncture wound with foreign body, unspecified lower leg, subsequent encounterCMS: Puncture wound w foreign body, unsp lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.849S | Puncture wound with foreign body, unspecified lower leg, sequelaCMS: Puncture wound with foreign body, unsp lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.85 Open bite of lower leg | ||||
| S81.851 Open bite, right lower leg | ||||
| S81.851A | Open bite, right lower leg, initial encounter | Can lead a claim | C | None |
| S81.851D | Open bite, right lower leg, subsequent encounter | Can lead a claim | C | None |
| S81.851S | Open bite, right lower leg, sequela | Can lead a claim | C | None |
| S81.852 Open bite, left lower leg | ||||
| S81.852A | Open bite, left lower leg, initial encounter | Can lead a claim | C | None |
| S81.852D | Open bite, left lower leg, subsequent encounter | Can lead a claim | C | None |
| S81.852S | Open bite, left lower leg, sequela | Can lead a claim | C | None |
| S81.859 Open bite, unspecified lower leg | ||||
| S81.859A | Open bite, unspecified lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.859D | Open bite, unspecified lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S81.859S | Open bite, unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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