ICD-10 · PDGM grouping
S80 Superficial injury of knee and lower leg
All 144 codes in the S80 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
144
Can lead a claim
0
Cannot lead a claim
144
What CMS assigns to S80
None of the 144 codes is assigned a clinical group. None of the 144 is assigned a comorbidity subgroup. None can lead a claim.
Every code in S80
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 |
|---|---|---|---|---|
| S80.0 Contusion of knee | ||||
| S80.00 Contusion of unspecified knee | ||||
| S80.00XA | Contusion of unspecified knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.00XD | Contusion of unspecified knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.00XS | Contusion of unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.01 Contusion of right knee | ||||
| S80.01XA | Contusion of right knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.01XD | Contusion of right knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.01XS | Contusion of right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.02 Contusion of left knee | ||||
| S80.02XA | Contusion of left knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.02XD | Contusion of left knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.02XS | Contusion of left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.1 Contusion of lower leg | ||||
| S80.10 Contusion of unspecified lower leg | ||||
| S80.10XA | Contusion of unspecified lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.10XD | Contusion of unspecified lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.10XS | Contusion of unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.11 Contusion of right lower leg | ||||
| S80.11XA | Contusion of right lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.11XD | Contusion of right lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.11XS | Contusion of right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.12 Contusion of left lower leg | ||||
| S80.12XA | Contusion of left lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.12XD | Contusion of left lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.12XS | Contusion of left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.2 Other superficial injuries of knee | ||||
| S80.21 Abrasion of knee | ||||
| S80.211 Abrasion, right knee | ||||
| S80.211A | Abrasion, right knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.211D | Abrasion, right knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.211S | Abrasion, right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.212 Abrasion, left knee | ||||
| S80.212A | Abrasion, left knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.212D | Abrasion, left knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.212S | Abrasion, left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.219 Abrasion, unspecified knee | ||||
| S80.219A | Abrasion, unspecified knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.219D | Abrasion, unspecified knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.219S | Abrasion, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.22 Blister (nonthermal) of knee | ||||
| S80.221 Blister (nonthermal), right knee | ||||
| S80.221A | Blister (nonthermal), right knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.221D | Blister (nonthermal), right knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.221S | Blister (nonthermal), right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.222 Blister (nonthermal), left knee | ||||
| S80.222A | Blister (nonthermal), left knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.222D | Blister (nonthermal), left knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.222S | Blister (nonthermal), left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.229 Blister (nonthermal), unspecified knee | ||||
| S80.229A | Blister (nonthermal), unspecified knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.229D | Blister (nonthermal), unspecified knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.229S | Blister (nonthermal), unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.24 External constriction of knee | ||||
| S80.241 External constriction, right knee | ||||
| S80.241A | External constriction, right knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.241D | External constriction, right knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.241S | External constriction, right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.242 External constriction, left knee | ||||
| S80.242A | External constriction, left knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.242D | External constriction, left knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.242S | External constriction, left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.249 External constriction, unspecified knee | ||||
| S80.249A | External constriction, unspecified knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.249D | External constriction, unspecified knee, subsequent encounterCMS: External constriction, unspecified knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.249S | External constriction, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.25 Superficial foreign body of knee | ||||
| S80.251 Superficial foreign body, right knee | ||||
| S80.251A | Superficial foreign body, right knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.251D | Superficial foreign body, right knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.251S | Superficial foreign body, right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.252 Superficial foreign body, left knee | ||||
| S80.252A | Superficial foreign body, left knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.252D | Superficial foreign body, left knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.252S | Superficial foreign body, left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.259 Superficial foreign body, unspecified knee | ||||
| S80.259A | Superficial foreign body, unspecified knee, initial encounterCMS: Superficial foreign body, unspecified knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.259D | Superficial foreign body, unspecified knee, subsequent encounterCMS: Superficial foreign body, unspecified knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.259S | Superficial foreign body, unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.26 Insect bite (nonvenomous) of knee | ||||
| S80.261 Insect bite (nonvenomous), right knee | ||||
| S80.261A | Insect bite (nonvenomous), right knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.261D | Insect bite (nonvenomous), right knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.261S | Insect bite (nonvenomous), right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.262 Insect bite (nonvenomous), left knee | ||||
| S80.262A | Insect bite (nonvenomous), left knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.262D | Insect bite (nonvenomous), left knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.262S | Insect bite (nonvenomous), left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.269 Insect bite (nonvenomous), unspecified knee | ||||
| S80.269A | Insect bite (nonvenomous), unspecified knee, initial encounterCMS: Insect bite (nonvenomous), unspecified knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.269D | Insect bite (nonvenomous), unspecified knee, subsequent encounterCMS: Insect bite (nonvenomous), unspecified knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.269S | Insect bite (nonvenomous), unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.27 Other superficial bite of knee | ||||
| S80.271 Other superficial bite of right knee | ||||
| S80.271A | Other superficial bite of right knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.271D | Other superficial bite of right knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.271S | Other superficial bite of right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.272 Other superficial bite of left knee | ||||
| S80.272A | Other superficial bite of left knee, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.272D | Other superficial bite of left knee, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.272S | Other superficial bite of left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.279 Other superficial bite of unspecified knee | ||||
| S80.279A | Other superficial bite of unspecified knee, initial encounterCMS: Other superficial bite of unspecified knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.279D | Other superficial bite of unspecified knee, subsequent encounterCMS: Other superficial bite of unspecified knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.279S | Other superficial bite of unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.8 Other superficial injuries of lower leg | ||||
| S80.81 Abrasion of lower leg | ||||
| S80.811 Abrasion, right lower leg | ||||
| S80.811A | Abrasion, right lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.811D | Abrasion, right lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.811S | Abrasion, right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.812 Abrasion, left lower leg | ||||
| S80.812A | Abrasion, left lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.812D | Abrasion, left lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.812S | Abrasion, left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.819 Abrasion, unspecified lower leg | ||||
| S80.819A | Abrasion, unspecified lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.819D | Abrasion, unspecified lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.819S | Abrasion, unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.82 Blister (nonthermal) of lower leg | ||||
| S80.821 Blister (nonthermal), right lower leg | ||||
| S80.821A | Blister (nonthermal), right lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.821D | Blister (nonthermal), right lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.821S | Blister (nonthermal), right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.822 Blister (nonthermal), left lower leg | ||||
| S80.822A | Blister (nonthermal), left lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.822D | Blister (nonthermal), left lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.822S | Blister (nonthermal), left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.829 Blister (nonthermal), unspecified lower leg | ||||
| S80.829A | Blister (nonthermal), unspecified lower leg, initial encounterCMS: Blister (nonthermal), unspecified lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.829D | Blister (nonthermal), unspecified lower leg, subsequent encounterCMS: Blister (nonthermal), unspecified lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.829S | Blister (nonthermal), unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.84 External constriction of lower leg | ||||
| S80.841 External constriction, right lower leg | ||||
| S80.841A | External constriction, right lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.841D | External constriction, right lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.841S | External constriction, right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.842 External constriction, left lower leg | ||||
| S80.842A | External constriction, left lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.842D | External constriction, left lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.842S | External constriction, left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.849 External constriction, unspecified lower leg | ||||
| S80.849A | External constriction, unspecified lower leg, initial encounterCMS: External constriction, unspecified lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.849D | External constriction, unspecified lower leg, subsequent encounterCMS: External constriction, unspecified lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.849S | External constriction, unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.85 Superficial foreign body of lower leg | ||||
| S80.851 Superficial foreign body, right lower leg | ||||
| S80.851A | Superficial foreign body, right lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.851D | Superficial foreign body, right lower leg, subsequent encounterCMS: Superficial foreign body, right lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.851S | Superficial foreign body, right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.852 Superficial foreign body, left lower leg | ||||
| S80.852A | Superficial foreign body, left lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.852D | Superficial foreign body, left lower leg, subsequent encounterCMS: Superficial foreign body, left lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.852S | Superficial foreign body, left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.859 Superficial foreign body, unspecified lower leg | ||||
| S80.859A | Superficial foreign body, unspecified lower leg, initial encounterCMS: Superficial foreign body, unspecified lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.859D | Superficial foreign body, unspecified lower leg, subsequent encounterCMS: Superficial foreign body, unspecified lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.859S | Superficial foreign body, unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.86 Insect bite (nonvenomous) of lower leg | ||||
| S80.861 Insect bite (nonvenomous), right lower leg | ||||
| S80.861A | Insect bite (nonvenomous), right lower leg, initial encounterCMS: Insect bite (nonvenomous), right lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.861D | Insect bite (nonvenomous), right lower leg, subsequent encounterCMS: Insect bite (nonvenomous), right lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.861S | Insect bite (nonvenomous), right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.862 Insect bite (nonvenomous), left lower leg | ||||
| S80.862A | Insect bite (nonvenomous), left lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.862D | Insect bite (nonvenomous), left lower leg, subsequent encounterCMS: Insect bite (nonvenomous), left lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.862S | Insect bite (nonvenomous), left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.869 Insect bite (nonvenomous), unspecified lower leg | ||||
| S80.869A | Insect bite (nonvenomous), unspecified lower leg, initial encounterCMS: Insect bite (nonvenomous), unsp lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.869D | Insect bite (nonvenomous), unspecified lower leg, subsequent encounterCMS: Insect bite (nonvenomous), unsp lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.869S | Insect bite (nonvenomous), unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.87 Other superficial bite of lower leg | ||||
| S80.871 Other superficial bite, right lower leg | ||||
| S80.871A | Other superficial bite, right lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.871D | Other superficial bite, right lower leg, subsequent encounterCMS: Other superficial bite, right lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.871S | Other superficial bite, right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.872 Other superficial bite, left lower leg | ||||
| S80.872A | Other superficial bite, left lower leg, initial encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.872D | Other superficial bite, left lower leg, subsequent encounter | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.872S | Other superficial bite, left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.879 Other superficial bite, unspecified lower leg | ||||
| S80.879A | Other superficial bite, unspecified lower leg, initial encounterCMS: Other superficial bite, unspecified lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.879D | Other superficial bite, unspecified lower leg, subsequent encounterCMS: Other superficial bite, unspecified lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.879S | Other superficial bite, unspecified lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.9 Unspecified superficial injury of knee and lower leg | ||||
| S80.91 Unspecified superficial injury of knee | ||||
| S80.911 Unspecified superficial injury of right knee | ||||
| S80.911A | Unspecified superficial injury of right knee, initial encounterCMS: Unspecified superficial injury of right knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.911D | Unspecified superficial injury of right knee, subsequent encounterCMS: Unspecified superficial injury of right knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.911S | Unspecified superficial injury of right knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.912 Unspecified superficial injury of left knee | ||||
| S80.912A | Unspecified superficial injury of left knee, initial encounterCMS: Unspecified superficial injury of left knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.912D | Unspecified superficial injury of left knee, subsequent encounterCMS: Unspecified superficial injury of left knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.912S | Unspecified superficial injury of left knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.919 Unspecified superficial injury of unspecified knee | ||||
| S80.919A | Unspecified superficial injury of unspecified knee, initial encounterCMS: Unsp superficial injury of unspecified knee, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.919D | Unspecified superficial injury of unspecified knee, subsequent encounterCMS: Unsp superficial injury of unspecified knee, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.919S | Unspecified superficial injury of unspecified knee, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.92 Unspecified superficial injury of lower leg | ||||
| S80.921 Unspecified superficial injury of right lower leg | ||||
| S80.921A | Unspecified superficial injury of right lower leg, initial encounterCMS: Unsp superficial injury of right lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.921D | Unspecified superficial injury of right lower leg, subsequent encounterCMS: Unsp superficial injury of right lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.921S | Unspecified superficial injury of right lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.922 Unspecified superficial injury of left lower leg | ||||
| S80.922A | Unspecified superficial injury of left lower leg, initial encounterCMS: Unsp superficial injury of left lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.922D | Unspecified superficial injury of left lower leg, subsequent encounterCMS: Unsp superficial injury of left lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.922S | Unspecified superficial injury of left lower leg, sequela | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.929 Unspecified superficial injury of unspecified lower leg | ||||
| S80.929A | Unspecified superficial injury of unspecified lower leg, initial encounterCMS: Unsp superficial injury of unsp lower leg, init encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.929D | Unspecified superficial injury of unspecified lower leg, subsequent encounterCMS: Unsp superficial injury of unsp lower leg, subs encntr | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| S80.929S | Unspecified superficial injury of unspecified lower leg, sequelaCMS: Unsp superficial injury of 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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