October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

S55 Injury of blood vessels at forearm level

All 135 codes in the S55 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

135

Can lead a claim

60

Cannot lead a claim

75

What CMS assigns to S55

60 of the 135 codes group to MMTA - Other (30) and Wound (30); 75 are assigned no clinical group. None of the 135 is assigned a comorbidity subgroup. 60 of the 135 can lead a claim.

Every code in S55

Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
S55.0 Injury of ulnar artery at forearm level
S55.00 Unspecified injury of ulnar artery at forearm level
S55.001 Unspecified injury of ulnar artery at forearm level, right arm
S55.001AUnspecified injury of ulnar artery at forearm level, right arm, initial encounterCMS: Unsp injury of ulnar artery at forarm lv, right arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.001DUnspecified injury of ulnar artery at forearm level, right arm, subsequent encounterCMS: Unsp injury of ulnar artery at forarm lv, right arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.001SUnspecified injury of ulnar artery at forearm level, right arm, sequelaCMS: Unsp injury of ulnar artery at forarm lv, right arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.002 Unspecified injury of ulnar artery at forearm level, left arm
S55.002AUnspecified injury of ulnar artery at forearm level, left arm, initial encounterCMS: Unsp injury of ulnar artery at forearm level, left arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.002DUnspecified injury of ulnar artery at forearm level, left arm, subsequent encounterCMS: Unsp injury of ulnar artery at forearm level, left arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.002SUnspecified injury of ulnar artery at forearm level, left arm, sequelaCMS: Unsp injury of ulnar artery at forarm lv, left arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.009 Unspecified injury of ulnar artery at forearm level, unspecified arm
S55.009AUnspecified injury of ulnar artery at forearm level, unspecified arm, initial encounterCMS: Unsp injury of ulnar artery at forearm level, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.009DUnspecified injury of ulnar artery at forearm level, unspecified arm, subsequent encounterCMS: Unsp injury of ulnar artery at forearm level, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.009SUnspecified injury of ulnar artery at forearm level, unspecified arm, sequelaCMS: Unsp injury of ulnar artery at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.01 Laceration of ulnar artery at forearm level
S55.011 Laceration of ulnar artery at forearm level, right arm
S55.011ALaceration of ulnar artery at forearm level, right arm, initial encounterCMS: Laceration of ulnar artery at forearm level, right arm, initCan lead a claimCNone
S55.011DLaceration of ulnar artery at forearm level, right arm, subsequent encounterCMS: Laceration of ulnar artery at forearm level, right arm, subsCan lead a claimCNone
S55.011SLaceration of ulnar artery at forearm level, right arm, sequelaCMS: Laceration of ulnar artery at forarm lv, right arm, sequelaCan lead a claimCNone
S55.012 Laceration of ulnar artery at forearm level, left arm
S55.012ALaceration of ulnar artery at forearm level, left arm, initial encounterCMS: Laceration of ulnar artery at forearm level, left arm, initCan lead a claimCNone
S55.012DLaceration of ulnar artery at forearm level, left arm, subsequent encounterCMS: Laceration of ulnar artery at forearm level, left arm, subsCan lead a claimCNone
S55.012SLaceration of ulnar artery at forearm level, left arm, sequelaCMS: Laceration of ulnar artery at forarm lv, left arm, sequelaCan lead a claimCNone
S55.019 Laceration of ulnar artery at forearm level, unspecified arm
S55.019ALaceration of ulnar artery at forearm level, unspecified arm, initial encounterCMS: Laceration of ulnar artery at forearm level, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.019DLaceration of ulnar artery at forearm level, unspecified arm, subsequent encounterCMS: Laceration of ulnar artery at forearm level, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.019SLaceration of ulnar artery at forearm level, unspecified arm, sequelaCMS: Laceration of ulnar artery at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.09 Other specified injury of ulnar artery at forearm level
S55.091 Other specified injury of ulnar artery at forearm level, right arm
S55.091AOther specified injury of ulnar artery at forearm level, right arm, initial encounterCMS: Inj ulnar artery at forearm level, right arm, init encntrCan lead a claimANone
S55.091DOther specified injury of ulnar artery at forearm level, right arm, subsequent encounterCMS: Inj ulnar artery at forearm level, right arm, subs encntrCan lead a claimANone
S55.091SOther specified injury of ulnar artery at forearm level, right arm, sequelaCMS: Inj ulnar artery at forearm level, right arm, sequelaCan lead a claimANone
S55.092 Other specified injury of ulnar artery at forearm level, left arm
S55.092AOther specified injury of ulnar artery at forearm level, left arm, initial encounterCMS: Inj ulnar artery at forearm level, left arm, init encntrCan lead a claimANone
S55.092DOther specified injury of ulnar artery at forearm level, left arm, subsequent encounterCMS: Inj ulnar artery at forearm level, left arm, subs encntrCan lead a claimANone
S55.092SOther specified injury of ulnar artery at forearm level, left arm, sequelaCMS: Inj ulnar artery at forearm level, left arm, sequelaCan lead a claimANone
S55.099 Other specified injury of ulnar artery at forearm level, unspecified arm
S55.099AOther specified injury of ulnar artery at forearm level, unspecified arm, initial encounterCMS: Inj ulnar artery at forearm level, unsp arm, init encntrCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.099DOther specified injury of ulnar artery at forearm level, unspecified arm, subsequent encounterCMS: Inj ulnar artery at forearm level, unsp arm, subs encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.099SOther specified injury of ulnar artery at forearm level, unspecified arm, sequelaCMS: Inj ulnar artery at forearm level, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.1 Injury of radial artery at forearm level
S55.10 Unspecified injury of radial artery at forearm level
S55.101 Unspecified injury of radial artery at forearm level, right arm
S55.101AUnspecified injury of radial artery at forearm level, right arm, initial encounterCMS: Unsp injury of radial artery at forarm lv, right arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.101DUnspecified injury of radial artery at forearm level, right arm, subsequent encounterCMS: Unsp injury of radial artery at forarm lv, right arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.101SUnspecified injury of radial artery at forearm level, right arm, sequelaCMS: Unsp injury of radial art at forarm lv, right arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.102 Unspecified injury of radial artery at forearm level, left arm
S55.102AUnspecified injury of radial artery at forearm level, left arm, initial encounterCMS: Unsp injury of radial artery at forarm lv, left arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.102DUnspecified injury of radial artery at forearm level, left arm, subsequent encounterCMS: Unsp injury of radial artery at forarm lv, left arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.102SUnspecified injury of radial artery at forearm level, left arm, sequelaCMS: Unsp injury of radial artery at forarm lv, left arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.109 Unspecified injury of radial artery at forearm level, unspecified arm
S55.109AUnspecified injury of radial artery at forearm level, unspecified arm, initial encounterCMS: Unsp injury of radial artery at forarm lv, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.109DUnspecified injury of radial artery at forearm level, unspecified arm, subsequent encounterCMS: Unsp injury of radial artery at forarm lv, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.109SUnspecified injury of radial artery at forearm level, unspecified arm, sequelaCMS: Unsp injury of radial artery at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.11 Laceration of radial artery at forearm level
S55.111 Laceration of radial artery at forearm level, right arm
S55.111ALaceration of radial artery at forearm level, right arm, initial encounterCMS: Laceration of radial artery at forarm lv, right arm, initCan lead a claimCNone
S55.111DLaceration of radial artery at forearm level, right arm, subsequent encounterCMS: Laceration of radial artery at forarm lv, right arm, subsCan lead a claimCNone
S55.111SLaceration of radial artery at forearm level, right arm, sequelaCMS: Laceration of radial artery at forarm lv, right arm, sequelaCan lead a claimCNone
S55.112 Laceration of radial artery at forearm level, left arm
S55.112ALaceration of radial artery at forearm level, left arm, initial encounterCMS: Laceration of radial artery at forearm level, left arm, initCan lead a claimCNone
S55.112DLaceration of radial artery at forearm level, left arm, subsequent encounterCMS: Laceration of radial artery at forearm level, left arm, subsCan lead a claimCNone
S55.112SLaceration of radial artery at forearm level, left arm, sequelaCMS: Laceration of radial artery at forarm lv, left arm, sequelaCan lead a claimCNone
S55.119 Laceration of radial artery at forearm level, unspecified arm
S55.119ALaceration of radial artery at forearm level, unspecified arm, initial encounterCMS: Laceration of radial artery at forearm level, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.119DLaceration of radial artery at forearm level, unspecified arm, subsequent encounterCMS: Laceration of radial artery at forearm level, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.119SLaceration of radial artery at forearm level, unspecified arm, sequelaCMS: Laceration of radial artery at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.19 Other specified injury of radial artery at forearm level
S55.191 Other specified injury of radial artery at forearm level, right arm
S55.191AOther specified injury of radial artery at forearm level, right arm, initial encounterCMS: Inj radial artery at forearm level, right arm, init encntrCan lead a claimANone
S55.191DOther specified injury of radial artery at forearm level, right arm, subsequent encounterCMS: Inj radial artery at forearm level, right arm, subs encntrCan lead a claimANone
S55.191SOther specified injury of radial artery at forearm level, right arm, sequelaCMS: Inj radial artery at forearm level, right arm, sequelaCan lead a claimANone
S55.192 Other specified injury of radial artery at forearm level, left arm
S55.192AOther specified injury of radial artery at forearm level, left arm, initial encounterCMS: Inj radial artery at forearm level, left arm, init encntrCan lead a claimANone
S55.192DOther specified injury of radial artery at forearm level, left arm, subsequent encounterCMS: Inj radial artery at forearm level, left arm, subs encntrCan lead a claimANone
S55.192SOther specified injury of radial artery at forearm level, left arm, sequelaCMS: Inj radial artery at forearm level, left arm, sequelaCan lead a claimANone
S55.199 Other specified injury of radial artery at forearm level, unspecified arm
S55.199AOther specified injury of radial artery at forearm level, unspecified arm, initial encounterCMS: Inj radial artery at forearm level, unsp arm, init encntrCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.199DOther specified injury of radial artery at forearm level, unspecified arm, subsequent encounterCMS: Inj radial artery at forearm level, unsp arm, subs encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.199SOther specified injury of radial artery at forearm level, unspecified arm, sequelaCMS: Inj radial artery at forearm level, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.2 Injury of vein at forearm level
S55.20 Unspecified injury of vein at forearm level
S55.201 Unspecified injury of vein at forearm level, right arm
S55.201AUnspecified injury of vein at forearm level, right arm, initial encounterCMS: Unsp injury of vein at forearm level, right arm, init encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.201DUnspecified injury of vein at forearm level, right arm, subsequent encounterCMS: Unsp injury of vein at forearm level, right arm, subs encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.201SUnspecified injury of vein at forearm level, right arm, sequelaCMS: Unsp injury of vein at forearm level, right arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.202 Unspecified injury of vein at forearm level, left arm
S55.202AUnspecified injury of vein at forearm level, left arm, initial encounterCMS: Unsp injury of vein at forearm level, left arm, init encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.202DUnspecified injury of vein at forearm level, left arm, subsequent encounterCMS: Unsp injury of vein at forearm level, left arm, subs encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.202SUnspecified injury of vein at forearm level, left arm, sequelaCMS: Unsp injury of vein at forearm level, left arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.209 Unspecified injury of vein at forearm level, unspecified arm
S55.209AUnspecified injury of vein at forearm level, unspecified arm, initial encounterCMS: Unsp injury of vein at forearm level, unsp arm, init encntrCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.209DUnspecified injury of vein at forearm level, unspecified arm, subsequent encounterCMS: Unsp injury of vein at forearm level, unsp arm, subs encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.209SUnspecified injury of vein at forearm level, unspecified arm, sequelaCMS: Unsp injury of vein at forearm level, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.21 Laceration of vein at forearm level
S55.211 Laceration of vein at forearm level, right arm
S55.211ALaceration of vein at forearm level, right arm, initial encounterCMS: Laceration of vein at forearm level, right arm, init encntrCan lead a claimCNone
S55.211DLaceration of vein at forearm level, right arm, subsequent encounterCMS: Laceration of vein at forearm level, right arm, subs encntrCan lead a claimCNone
S55.211SLaceration of vein at forearm level, right arm, sequelaCan lead a claimCNone
S55.212 Laceration of vein at forearm level, left arm
S55.212ALaceration of vein at forearm level, left arm, initial encounterCMS: Laceration of vein at forearm level, left arm, init encntrCan lead a claimCNone
S55.212DLaceration of vein at forearm level, left arm, subsequent encounterCMS: Laceration of vein at forearm level, left arm, subs encntrCan lead a claimCNone
S55.212SLaceration of vein at forearm level, left arm, sequelaCan lead a claimCNone
S55.219 Laceration of vein at forearm level, unspecified arm
S55.219ALaceration of vein at forearm level, unspecified arm, initial encounterCMS: Laceration of vein at forearm level, unsp arm, init encntrCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.219DLaceration of vein at forearm level, unspecified arm, subsequent encounterCMS: Laceration of vein at forearm level, unsp arm, subs encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.219SLaceration of vein at forearm level, unspecified arm, sequelaCMS: Laceration of vein at forearm level, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.29 Other specified injury of vein at forearm level
S55.291 Other specified injury of vein at forearm level, right arm
S55.291AOther specified injury of vein at forearm level, right arm, initial encounterCMS: Oth injury of vein at forearm level, right arm, init encntrCan lead a claimANone
S55.291DOther specified injury of vein at forearm level, right arm, subsequent encounterCMS: Oth injury of vein at forearm level, right arm, subs encntrCan lead a claimANone
S55.291SOther specified injury of vein at forearm level, right arm, sequelaCMS: Oth injury of vein at forearm level, right arm, sequelaCan lead a claimANone
S55.292 Other specified injury of vein at forearm level, left arm
S55.292AOther specified injury of vein at forearm level, left arm, initial encounterCMS: Oth injury of vein at forearm level, left arm, init encntrCan lead a claimANone
S55.292DOther specified injury of vein at forearm level, left arm, subsequent encounterCMS: Oth injury of vein at forearm level, left arm, subs encntrCan lead a claimANone
S55.292SOther specified injury of vein at forearm level, left arm, sequelaCMS: Oth injury of vein at forearm level, left arm, sequelaCan lead a claimANone
S55.299 Other specified injury of vein at forearm level, unspecified arm
S55.299AOther specified injury of vein at forearm level, unspecified arm, initial encounterCMS: Oth injury of vein at forearm level, unsp arm, init encntrCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.299DOther specified injury of vein at forearm level, unspecified arm, subsequent encounterCMS: Oth injury of vein at forearm level, unsp arm, subs encntrCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.299SOther specified injury of vein at forearm level, unspecified arm, sequelaCMS: Oth injury of vein at forearm level, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.8 Injury of other blood vessels at forearm level
S55.80 Unspecified injury of other blood vessels at forearm level
S55.801 Unspecified injury of other blood vessels at forearm level, right arm
S55.801AUnspecified injury of other blood vessels at forearm level, right arm, initial encounterCMS: Unsp injury of blood vessels at forarm lv, right arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.801DUnspecified injury of other blood vessels at forearm level, right arm, subsequent encounterCMS: Unsp injury of blood vessels at forarm lv, right arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.801SUnspecified injury of other blood vessels at forearm level, right arm, sequelaCMS: Unsp inj blood vessels at forarm lv, right arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.802 Unspecified injury of other blood vessels at forearm level, left arm
S55.802AUnspecified injury of other blood vessels at forearm level, left arm, initial encounterCMS: Unsp injury of blood vessels at forarm lv, left arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.802DUnspecified injury of other blood vessels at forearm level, left arm, subsequent encounterCMS: Unsp injury of blood vessels at forarm lv, left arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.802SUnspecified injury of other blood vessels at forearm level, left arm, sequelaCMS: Unsp injury of blood vessels at forarm lv, left arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.809 Unspecified injury of other blood vessels at forearm level, unspecified arm
S55.809AUnspecified injury of other blood vessels at forearm level, unspecified arm, initial encounterCMS: Unsp injury of blood vessels at forarm lv, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.809DUnspecified injury of other blood vessels at forearm level, unspecified arm, subsequent encounterCMS: Unsp injury of blood vessels at forarm lv, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.809SUnspecified injury of other blood vessels at forearm level, unspecified arm, sequelaCMS: Unsp injury of blood vessels at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.81 Laceration of other blood vessels at forearm level
S55.811 Laceration of other blood vessels at forearm level, right arm
S55.811ALaceration of other blood vessels at forearm level, right arm, initial encounterCMS: Laceration of blood vessels at forarm lv, right arm, initCan lead a claimCNone
S55.811DLaceration of other blood vessels at forearm level, right arm, subsequent encounterCMS: Laceration of blood vessels at forarm lv, right arm, subsCan lead a claimCNone
S55.811SLaceration of other blood vessels at forearm level, right arm, sequelaCMS: Laceration of blood vessels at forarm lv, right arm, sequelaCan lead a claimCNone
S55.812 Laceration of other blood vessels at forearm level, left arm
S55.812ALaceration of other blood vessels at forearm level, left arm, initial encounterCMS: Laceration of blood vessels at forearm level, left arm, initCan lead a claimCNone
S55.812DLaceration of other blood vessels at forearm level, left arm, subsequent encounterCMS: Laceration of blood vessels at forearm level, left arm, subsCan lead a claimCNone
S55.812SLaceration of other blood vessels at forearm level, left arm, sequelaCMS: Laceration of blood vessels at forarm lv, left arm, sequelaCan lead a claimCNone
S55.819 Laceration of other blood vessels at forearm level, unspecified arm
S55.819ALaceration of other blood vessels at forearm level, unspecified arm, initial encounterCMS: Laceration of blood vessels at forearm level, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.819DLaceration of other blood vessels at forearm level, unspecified arm, subsequent encounterCMS: Laceration of blood vessels at forearm level, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.819SLaceration of other blood vessels at forearm level, unspecified arm, sequelaCMS: Laceration of blood vessels at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.89 Other specified injury of other blood vessels at forearm level
S55.891 Other specified injury of other blood vessels at forearm level, right arm
S55.891AOther specified injury of other blood vessels at forearm level, right arm, initial encounterCMS: Inj oth blood vessels at forearm level, right arm, initCan lead a claimANone
S55.891DOther specified injury of other blood vessels at forearm level, right arm, subsequent encounterCMS: Inj oth blood vessels at forearm level, right arm, subsCan lead a claimANone
S55.891SOther specified injury of other blood vessels at forearm level, right arm, sequelaCMS: Inj oth blood vessels at forearm level, right arm, sequelaCan lead a claimANone
S55.892 Other specified injury of other blood vessels at forearm level, left arm
S55.892AOther specified injury of other blood vessels at forearm level, left arm, initial encounterCMS: Inj oth blood vessels at forearm level, left arm, initCan lead a claimANone
S55.892DOther specified injury of other blood vessels at forearm level, left arm, subsequent encounterCMS: Inj oth blood vessels at forearm level, left arm, subsCan lead a claimANone
S55.892SOther specified injury of other blood vessels at forearm level, left arm, sequelaCMS: Inj oth blood vessels at forearm level, left arm, sequelaCan lead a claimANone
S55.899 Other specified injury of other blood vessels at forearm level, unspecified arm
S55.899AOther specified injury of other blood vessels at forearm level, unspecified arm, initial encounterCMS: Inj oth blood vessels at forearm level, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.899DOther specified injury of other blood vessels at forearm level, unspecified arm, subsequent encounterCMS: Inj oth blood vessels at forearm level, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.899SOther specified injury of other blood vessels at forearm level, unspecified arm, sequelaCMS: Inj oth blood vessels at forearm level, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.9 Injury of unspecified blood vessel at forearm level
S55.90 Unspecified injury of unspecified blood vessel at forearm level
S55.901 Unspecified injury of unspecified blood vessel at forearm level, right arm
S55.901AUnspecified injury of unspecified blood vessel at forearm level, right arm, initial encounterCMS: Unsp injury of unsp blood vess at forarm lv, right arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.901DUnspecified injury of unspecified blood vessel at forearm level, right arm, subsequent encounterCMS: Unsp injury of unsp blood vess at forarm lv, right arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.901SUnspecified injury of unspecified blood vessel at forearm level, right arm, sequelaCMS: Unsp inj unsp blood vess at forarm lv, right arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.902 Unspecified injury of unspecified blood vessel at forearm level, left arm
S55.902AUnspecified injury of unspecified blood vessel at forearm level, left arm, initial encounterCMS: Unsp injury of unsp blood vess at forarm lv, left arm, initCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.902DUnspecified injury of unspecified blood vessel at forearm level, left arm, subsequent encounterCMS: Unsp injury of unsp blood vess at forarm lv, left arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.902SUnspecified injury of unspecified blood vessel at forearm level, left arm, sequelaCMS: Unsp inj unsp blood vess at forarm lv, left arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.909 Unspecified injury of unspecified blood vessel at forearm level, unspecified arm
S55.909AUnspecified injury of unspecified blood vessel at forearm level, unspecified arm, initial encounterCMS: Unsp injury of unsp blood vess at forarm lv, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.909DUnspecified injury of unspecified blood vessel at forearm level, unspecified arm, subsequent encounterCMS: Unsp injury of unsp blood vess at forarm lv, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.909SUnspecified injury of unspecified blood vessel at forearm level, unspecified arm, sequelaCMS: Unsp inj unsp blood vess at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.91 Laceration of unspecified blood vessel at forearm level
S55.911 Laceration of unspecified blood vessel at forearm level, right arm
S55.911ALaceration of unspecified blood vessel at forearm level, right arm, initial encounterCMS: Lacerat unsp blood vessel at forarm lv, right arm, initCan lead a claimCNone
S55.911DLaceration of unspecified blood vessel at forearm level, right arm, subsequent encounterCMS: Lacerat unsp blood vessel at forarm lv, right arm, subsCan lead a claimCNone
S55.911SLaceration of unspecified blood vessel at forearm level, right arm, sequelaCMS: Lacerat unsp blood vessel at forarm lv, right arm, sequelaCan lead a claimCNone
S55.912 Laceration of unspecified blood vessel at forearm level, left arm
S55.912ALaceration of unspecified blood vessel at forearm level, left arm, initial encounterCMS: Laceration of unsp blood vessel at forarm lv, left arm, initCan lead a claimCNone
S55.912DLaceration of unspecified blood vessel at forearm level, left arm, subsequent encounterCMS: Laceration of unsp blood vessel at forarm lv, left arm, subsCan lead a claimCNone
S55.912SLaceration of unspecified blood vessel at forearm level, left arm, sequelaCMS: Lacerat unsp blood vessel at forarm lv, left arm, sequelaCan lead a claimCNone
S55.919 Laceration of unspecified blood vessel at forearm level, unspecified arm
S55.919ALaceration of unspecified blood vessel at forearm level, unspecified arm, initial encounterCMS: Laceration of unsp blood vessel at forarm lv, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.919DLaceration of unspecified blood vessel at forearm level, unspecified arm, subsequent encounterCMS: Laceration of unsp blood vessel at forarm lv, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.919SLaceration of unspecified blood vessel at forearm level, unspecified arm, sequelaCMS: Lacerat unsp blood vessel at forarm lv, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.99 Other specified injury of unspecified blood vessel at forearm level
S55.991 Other specified injury of unspecified blood vessel at forearm level, right arm
S55.991AOther specified injury of unspecified blood vessel at forearm level, right arm, initial encounterCMS: Inj unsp blood vessel at forearm level, right arm, initCan lead a claimANone
S55.991DOther specified injury of unspecified blood vessel at forearm level, right arm, subsequent encounterCMS: Inj unsp blood vessel at forearm level, right arm, subsCan lead a claimANone
S55.991SOther specified injury of unspecified blood vessel at forearm level, right arm, sequelaCMS: Inj unsp blood vessel at forearm level, right arm, sequelaCan lead a claimANone
S55.992 Other specified injury of unspecified blood vessel at forearm level, left arm
S55.992AOther specified injury of unspecified blood vessel at forearm level, left arm, initial encounterCMS: Inj unsp blood vessel at forearm level, left arm, initCan lead a claimANone
S55.992DOther specified injury of unspecified blood vessel at forearm level, left arm, subsequent encounterCMS: Inj unsp blood vessel at forearm level, left arm, subsCan lead a claimANone
S55.992SOther specified injury of unspecified blood vessel at forearm level, left arm, sequelaCMS: Inj unsp blood vessel at forearm level, left arm, sequelaCan lead a claimANone
S55.999 Other specified injury of unspecified blood vessel at forearm level, unspecified arm
S55.999AOther specified injury of unspecified blood vessel at forearm level, unspecified arm, initial encounterCMS: Inj unsp blood vessel at forearm level, unsp arm, initCannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the conditionNoneNone
S55.999DOther specified injury of unspecified blood vessel at forearm level, unspecified arm, subsequent encounterCMS: Inj unsp blood vessel at forearm level, unsp arm, subsCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone
S55.999SOther specified injury of unspecified blood vessel at forearm level, unspecified arm, sequelaCMS: Inj unsp blood vessel at forearm level, unsp arm, sequelaCannot lead a claimPrincipal diagnosis not assigned to a clinical groupNoneNone

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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