ICD-10-CM Use Additional Code Notes · Chapter 19 · FY 2027 S00-T88

Use Additional Code Notes in Chapter 19: Injury, poisoning and certain other consequences of external causes ICD-10-CM

A Use Additional Code note means a second code should be added, after this one, to fully describe the condition. In Chapter 19 (S00-T88), notes printed in the chapter name other codes 244 times, and Use Additional Code Notes anywhere in the Tabular List name the chapter’s codes 154 times, covering 43 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
244
References in Its Notes
154
References to Its Codes
43
Chapter Codes Named
S00-T88
Chapter 19
Chapter 19

Use Additional Code Notes by the code that carries the note

112 of 112 shown
  • Chapter note Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
    • code to identify any retained foreign body, if applicable (Z18.-)
  • S04.0 Injury of optic nerve and pathways applies to 30 codes
    • code to identify any visual field defect or blindness (H53.4-, H54.-)
  • S06 Intracranial injury applies to 569 codes
    • code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)
  • S06.2 Diffuse traumatic brain injury applies to 29 codes
    • code, if applicable, for traumatic brain compression or herniation (S06.A-)
  • S06.3 Focal traumatic brain injury applies to 261 codes
    • code, if applicable, for traumatic brain compression or herniation (S06.A-)
  • S06.5 Traumatic subdural hemorrhage applies to 29 codes
    • code, if applicable, for traumatic brain compression or herniation (S06.A-)
  • S06.6 Traumatic subarachnoid hemorrhage applies to 29 codes
    • code, if applicable, for traumatic brain compression or herniation (S06.A-)
  • S07 Crushing injury of head applies to 12 codes
    • intracranial injuries (S06.-)
    • skull fractures (S02.-)
  • S17 Crushing injury of neck applies to 9 codes
  • S30.842 External constriction of penis applies to 3 codes
    • cause code to identify the constricting item (W49.0-)
  • S38.1 Crushing injury of abdomen, lower back, and pelvis applies to 3 codes
    • fracture of thoracic or lumbar spine and pelvis (S22.0-, S32.-)
    • injury to intra-abdominal organs (S36.-)
    • injury to urinary and pelvic organs (S37.-)
    • open wound of abdominal wall (S31.-)
    • spinal cord injury (S34.0, S34.1-)
  • S60.34 External constriction of thumb applies to 9 codes
    • cause code to identify the constricting item (W49.0-)
  • S60.44 External constriction of fingers applies to 30 codes
    • cause code to identify the constricting item (W49.0-)
  • S67 Crushing injury of wrist, hand and fingers applies to 75 codes
    • fracture of wrist and hand (S62.-)
    • open wound of wrist and hand (S61.-)
  • Block note Block T15-T19 Effects of foreign body entering through natural orifice applies to 261 codes
    • code, if known, for foreign body entering into or through a natural orifice (W44.-)
  • Block note Block T20-T25 Burns and corrosions of external body surface, specified by site applies to 2,304 codes
    • code from category T31 or T32 to identify extent of body surface involved
  • T20.0 Burn of unspecified degree of head, face, and neck applies to 33 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T20.1 Burn of first degree of head, face, and neck applies to 33 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T20.2 Burn of second degree of head, face, and neck applies to 33 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T20.3 Burn of third degree of head, face, and neck applies to 33 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T20.4 Corrosion of unspecified degree of head, face, and neck applies to 33 codes
    • external cause code to identify place (Y92)
  • T20.5 Corrosion of first degree of head, face, and neck applies to 33 codes
    • external cause code to identify place (Y92)
  • T20.6 Corrosion of second degree of head, face, and neck applies to 33 codes
    • external cause code to identify place (Y92)
  • T20.7 Corrosion of third degree of head, face, and neck applies to 33 codes
    • external cause code to identify place (Y92)
  • T21.0 Burn of unspecified degree of trunk applies to 27 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T21.1 Burn of first degree of trunk applies to 27 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T21.2 Burn of second degree of trunk applies to 27 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T21.3 Burn of third degree of trunk applies to 27 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T21.4 Corrosion of unspecified degree of trunk applies to 27 codes
    • external cause code to identify place (Y92)
  • T21.5 Corrosion of first degree of trunk applies to 27 codes
    • external cause code to identify place (Y92)
  • T21.6 Corrosion of second degree of trunk applies to 27 codes
    • external cause code to identify place (Y92)
  • T21.7 Corrosion of third degree of trunk applies to 27 codes
    • external cause code to identify place (Y92)
  • T22.0 Burn of unspecified degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T22.1 Burn of first degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T22.2 Burn of second degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T22.3 Burn of third degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T22.4 Corrosion of unspecified degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify place (Y92)
  • T22.5 Corrosion of first degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify place (Y92)
  • T22.6 Corrosion of second degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify place (Y92)
  • T22.7 Corrosion of third degree of shoulder and upper limb, except wrist and hand applies to 66 codes
    • external cause code to identify place (Y92)
  • T23.0 Burn of unspecified degree of wrist and hand applies to 81 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T23.1 Burn of first degree of wrist and hand applies to 81 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T23.2 Burn of second degree of wrist and hand applies to 81 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T23.3 Burn of third degree of wrist and hand applies to 81 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T23.4 Corrosion of unspecified degree of wrist and hand applies to 81 codes
    • external cause code to identify place (Y92)
  • T23.5 Corrosion of first degree of wrist and hand applies to 81 codes
    • external cause code to identify place (Y92)
  • T23.6 Corrosion of second degree of wrist and hand applies to 81 codes
    • external cause code to identify place (Y92)
  • T23.7 Corrosion of third degree of wrist and hand applies to 81 codes
    • external cause code to identify place (Y92)
  • T24.0 Burn of unspecified degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T24.1 Burn of first degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T24.2 Burn of second degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T24.3 Burn of third degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T24.4 Corrosion of unspecified degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify place (Y92)
  • T24.5 Corrosion of first degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify place (Y92)
  • T24.6 Corrosion of second degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify place (Y92)
  • T24.7 Corrosion of third degree of lower limb, except ankle and foot applies to 45 codes
    • external cause code to identify place (Y92)
  • T25.0 Burn of unspecified degree of ankle and foot applies to 36 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T25.1 Burn of first degree of ankle and foot applies to 36 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T25.2 Burn of second degree of ankle and foot applies to 36 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T25.3 Burn of third degree of ankle and foot applies to 36 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T25.4 Corrosion of unspecified degree of ankle and foot applies to 36 codes
    • external cause code to identify place (Y92)
  • T25.5 Corrosion of first degree of ankle and foot applies to 36 codes
    • external cause code to identify place (Y92)
  • T25.6 Corrosion of second degree of ankle and foot applies to 36 codes
    • external cause code to identify place (Y92)
  • T25.7 Corrosion of third degree of ankle and foot applies to 36 codes
    • external cause code to identify place (Y92)
  • T26.0 Burn of eyelid and periocular area applies to 9 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T26.1 Burn of cornea and conjunctival sac applies to 9 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T26.2 Burn with resulting rupture and destruction of eyeball applies to 9 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T26.3 Burns of other specified parts of eye and adnexa applies to 9 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T26.4 Burn of eye and adnexa, part unspecified applies to 9 codes
    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
  • T26.5 Corrosion of eyelid and periocular area applies to 9 codes
    • external cause code to identify place (Y92)
  • T26.6 Corrosion of cornea and conjunctival sac applies to 9 codes
    • external cause code to identify place (Y92)
  • T26.7 Corrosion with resulting rupture and destruction of eyeball applies to 9 codes
    • external cause code to identify place (Y92)
  • T26.8 Corrosions of other specified parts of eye and adnexa applies to 9 codes
    • external cause code to identify place (Y92)
  • T26.9 Corrosion of eye and adnexa, part unspecified applies to 9 codes
    • external cause code to identify place (Y92)
  • T27 Burn and corrosion of respiratory tract applies to 24 codes
    • external cause code to identify the source and intent of the burn (X00-X19, X75-X77, X96-X98)
    • external cause code to identify place (Y92)
  • T28 Burn and corrosion of other internal organs applies to 54 codes
    • external cause code to identify the source and intent of the burn (X00-X19, X75-X77, X96-X98)
    • external cause code to identify place (Y92)
  • Block note Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances applies to 3,186 codes
  • Block note Block T51-T65 Toxic effects of substances chiefly nonmedicinal as to source applies to 1,680 codes
    • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
    • personal history of foreign body fully removed (Z87.821)
    • to identify any retained foreign body, if applicable (Z18.-)
  • T56 Toxic effect of metals applies to 144 codes
    • code to identify any retained metal foreign body, if applicable (Z18.0-, T18.1-)
  • T63.4 Toxic effect of venom of other arthropods applies to 84 codes
    • code, if applicable, for anaphylactic shock (T78.2)
  • T65.22 Toxic effect of tobacco cigarettes applies to 12 codes
    • code for exposure to second hand tobacco smoke (Z57.31, Z77.22)
  • T65.84 Toxic effect of xylazine applies to 12 codes
    • cellulitis and acute lymphangitis (L03.-)
    • cutaneous abscess, furuncle and carbuncle (L02.-)
    • non-pressure chronic ulcer of lower limb, not elsewhere classified (L97.-)
    • non-pressure chronic ulcer of skin, not elsewhere classified (L98.4-)
  • T65.85 Toxic effect of medetomidine applies to 12 codes
    • bradycardia NOS (R00.1)
    • somnolence, stupor and coma (R40.-)
  • T67.0 Heatstroke and sunstroke applies to 9 codes
    • coma and stupor (R40.-)
    • rhabdomyolysis (M62.82)
    • systemic inflammatory response syndrome (R65.1-)
  • T68 Hypothermia applies to 3 codes
    • Exposure to excessive cold of man-made origin (W93)
    • Exposure to excessive cold of natural origin (X31)
  • T69 Other effects of reduced temperature applies to 27 codes
    • Exposure to excessive cold of man-made origin (W93)
    • Exposure to excessive cold of natural origin (X31)
  • T71.16 Asphyxiation due to hanging applies to 12 codes
    • crushing injury of neck (S17.-)
    • fracture of cervical vertebrae (S12.0-S12.2-)
    • open wound of neck (S11.-)
  • T71.21 Asphyxiation due to cave-in or falling earth applies to 3 codes
    • code for any associated cataclysm (X34-X38)
  • T74 Adult and child abuse, neglect and other maltreatment, confirmed applies to 51 codes
    • external cause code to identify perpetrator, if known (Y07.-)
  • T75.3 Motion sickness applies to 3 codes
    • external cause code to identify vehicle or type of motion (Y92.81-)
  • Block note Block T80-T88 Complications of surgical and medical care, not elsewhere classified applies to 1,683 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
    • code to identify devices involved and details of circumstances (Y62-Y82)
  • T80.2 Infections following infusion, transfusion and therapeutic injection applies to 18 codes
    • sepsis (A41.9)
    • code (R65.2-) to identify severe sepsis, if applicable
  • T80.82 Complication of immune effector cellular therapy applies to 3 codes
    • cytokine release syndrome (D89.83-)
    • immune effector cell-associated neurotoxicity syndrome (G92.0-)
  • T80.89 Other complications following infusion, transfusion and therapeutic injection applies to 3 codes
    • code to identify graft-versus-host reaction, if applicable, (D89.81-)
  • T81 Complications of procedures, not elsewhere classified applies to 240 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • T81.4 Infection following a procedure applies to 18 codes
    • code (R65.2-) to identify severe sepsis, if applicable
  • T81.83 Persistent postprocedural fistula applies to 3 codes
    • anal fistula (K60.3-)
    • anorectal fistula (K60.5-)
    • bladder fistula (N32.2)
    • other female intestinal-genital tract fistulae (N82.4)
  • T81.89 Other complications of procedures, not elsewhere classified applies to 3 codes
    • postprocedural delirium (F05)
  • T84.018 Broken internal joint prosthesis, other site applies to 3 codes
    • code to identify the joint (Z96.6-)
  • T84.028 Dislocation of other internal joint prosthesis applies to 3 codes
    • code to identify the joint (Z96.6-)
  • T84.038 Mechanical loosening of other internal prosthetic joint applies to 3 codes
    • code to identify the joint (Z96.6-)
  • T84.05 Periprosthetic osteolysis of internal prosthetic joint applies to 18 codes
    • code to identify major osseous defect, if applicable (M89.7-)
  • T84.058 Periprosthetic osteolysis of other internal prosthetic joint applies to 3 codes
    • code to identify the joint (Z96.6-)
  • T84.068 Wear of articular bearing surface of other internal prosthetic joint applies to 3 codes
    • code to identify the joint (Z96.6-)
  • T84.098 Other mechanical complication of other internal joint prosthesis applies to 3 codes
    • code to identify the joint (Z96.6-)
  • T86 Complications of transplanted organs and tissue applies to 77 codes
    • graft-versus-host disease (D89.81-)
    • malignancy associated with organ transplant (C80.2)
    • post-transplant lymphoproliferative disorders (PTLD) (D47.Z1)
  • T86.43 Liver transplant infection
    • Cytomegalovirus (CMV) infection (B25.-)
  • T88.2 Shock due to anesthesia applies to 3 codes
    • code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5)
  • T88.3 Malignant hyperthermia due to anesthesia applies to 3 codes
    • code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5)
  • T88.5 Other complications of anesthesia applies to 12 codes
    • code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5)
  • T88.6 Anaphylactic reaction due to adverse effect of correct drug or medicament properly administered applies to 3 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • T88.7 Unspecified adverse effect of drug or medicament applies to 3 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Use Additional Code Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Use Additional Code Notes

What does a Use Additional Code note mean?

A Use Additional Code note tells you to add a second code, reported after the code that carries the note, to describe the condition completely. In an etiology/manifestation pair it sits at the etiology code and points to the manifestation (Section I.A.13). The FY 2027 Tabular List has 1,491 of them; 1,174 name other codes, with 1,438 references to 389 distinct codes, categories and ranges.

Where does the additional code go?

After the code carrying the note. For etiology/manifestation pairs the Guidelines are explicit: the etiology is sequenced first, followed by the manifestation code.

Related References

ICD-10-CM Official GuidelinesICD-10-CM Code LookupICD-10-CM Codes ListCode Lists by Tag

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.