ICD-10-CM T21: Burn and corrosion of trunk

ICD-10-CM Diagnosis Code (2025)

Official Description for T21

Burn and corrosion of trunk

Coding Notes & Guidelines for T21

Includes Notes

burns and corrosion of hip region

Excludes2: Not Included Here
  • burns and corrosion of axilla (T22.- with fifth character 4)
  • burns and corrosion of scapular region (T22.- with fifth character 6)
  • burns and corrosion of shoulder (T22.- with fifth character 5)
Excludes2: Not Included Here

burn of vagina (T28.3)

Excludes2: Not Included Here

burn of vagina (T28.3)

Excludes2: Not Included Here

burn of vagina (T28.3)

Excludes2: Not Included Here

burn of vagina (T28.3)

Excludes2: Not Included Here

corrosion of vagina (T28.8)

Excludes2: Not Included Here

corrosion of vagina (T28.8)

Excludes2: Not Included Here

corrosion of vagina (T28.8)

Excludes2: Not Included Here

corrosion of vagina (T28.8)

Code First

(T51-T65) to identify chemical and intent

Code First

(T51-T65) to identify chemical and intent

Code First

(T51-T65) to identify chemical and intent

Code First

(T51-T65) to identify chemical and intent

Use Additional Code

external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)

Use Additional Code

external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)

Use Additional Code

external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)

Use Additional Code

external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)

Use Additional Code

external cause code to identify place (Y92)

Use Additional Code

external cause code to identify place (Y92)

Use Additional Code

external cause code to identify place (Y92)

Use Additional Code

external cause code to identify place (Y92)

Inclusion Terms

Burn of unspecified degree of breast

Inclusion Terms
  • Burn of unspecified degree of flank
  • Burn of unspecified degree of groin
Inclusion Terms

Burn of unspecified degree of interscapular region

Inclusion Terms

Burn of unspecified degree of anus

Inclusion Terms
  • Burn of unspecified degree of penis
  • Burn of unspecified degree of scrotum
  • Burn of unspecified degree of testis
Inclusion Terms
  • Burn of unspecified degree of labium (majus) (minus)
  • Burn of unspecified degree of perineum
  • Burn of unspecified degree of vulva
Inclusion Terms

Burn of first degree of breast

Inclusion Terms
  • Burn of first degree of flank
  • Burn of first degree of groin
Inclusion Terms

Burn of first degree of interscapular region

Inclusion Terms

Burn of first degree of anus

Inclusion Terms
  • Burn of first degree of penis
  • Burn of first degree of scrotum
  • Burn of first degree of testis
Inclusion Terms
  • Burn of first degree of labium (majus) (minus)
  • Burn of first degree of perineum
  • Burn of first degree of vulva
Inclusion Terms

Burn of second degree of breast

Inclusion Terms
  • Burn of second degree of flank
  • Burn of second degree of groin
Inclusion Terms

Burn of second degree of interscapular region

Inclusion Terms

Burn of second degree of anus

Inclusion Terms
  • Burn of second degree of penis
  • Burn of second degree of scrotum
  • Burn of second degree of testis
Inclusion Terms
  • Burn of second degree of labium (majus) (minus)
  • Burn of second degree of perineum
  • Burn of second degree of vulva
Inclusion Terms

Burn of third degree of breast

Inclusion Terms
  • Burn of third degree of flank
  • Burn of third degree of groin
Inclusion Terms

Burn of third degree of interscapular region

Inclusion Terms

Burn of third degree of anus

Inclusion Terms
  • Burn of third degree of penis
  • Burn of third degree of scrotum
  • Burn of third degree of testis
Inclusion Terms
  • Burn of third degree of labium (majus) (minus)
  • Burn of third degree of perineum
  • Burn of third degree of vulva
Inclusion Terms

Corrosion of unspecified degree of breast

Inclusion Terms
  • Corrosion of unspecified degree of flank
  • Corrosion of unspecified degree of groin
Inclusion Terms

Corrosion of unspecified degree of interscapular region

Inclusion Terms

Corrosion of unspecified degree of anus

Inclusion Terms
  • Corrosion of unspecified degree of penis
  • Corrosion of unspecified degree of scrotum
  • Corrosion of unspecified degree of testis
Inclusion Terms
  • Corrosion of unspecified degree of labium (majus) (minus)
  • Corrosion of unspecified degree of perineum
  • Corrosion of unspecified degree of vulva
Inclusion Terms

Corrosion of first degree of breast

Inclusion Terms
  • Corrosion of first degree of flank
  • Corrosion of first degree of groin
Inclusion Terms

Corrosion of first degree of interscapular region

Inclusion Terms

Corrosion of first degree of anus

Inclusion Terms
  • Corrosion of first degree of penis
  • Corrosion of first degree of scrotum
  • Corrosion of first degree of testis
Inclusion Terms
  • Corrosion of first degree of labium (majus) (minus)
  • Corrosion of first degree of perineum
  • Corrosion of first degree of vulva
Inclusion Terms

Corrosion of second degree of breast

Inclusion Terms
  • Corrosion of second degree of flank
  • Corrosion of second degree of groin
Inclusion Terms

Corrosion of second degree of interscapular region

Inclusion Terms

Corrosion of second degree of anus

Inclusion Terms
  • Corrosion of second degree of penis
  • Corrosion of second degree of scrotum
  • Corrosion of second degree of testis
Inclusion Terms
  • Corrosion of second degree of labium (majus) (minus)
  • Corrosion of second degree of perineum
  • Corrosion of second degree of vulva
Inclusion Terms

Corrosion of third degree of breast

Inclusion Terms
  • Corrosion of third degree of flank
  • Corrosion of third degree of groin
Inclusion Terms

Corrosion of third degree of interscapular region

Inclusion Terms

Corrosion of third degree of anus

Inclusion Terms
  • Corrosion of third degree of penis
  • Corrosion of third degree of scrotum
  • Corrosion of third degree of testis
Inclusion Terms
  • Corrosion of third degree of labium (majus) (minus)
  • Corrosion of third degree of perineum
  • Corrosion of third degree of vulva
7th Character Guidance

The appropriate 7th character is to be added to each code from category T21

7th Character Definitions
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela

Child Codes (More Specific Codes for T21):

T21.0 - Burn of unspecified degree of trunk T21.00 - Burn of unspecified degree of trunk, unspecified site T21.01 - Burn of unspecified degree of chest wall T21.02 - Burn of unspecified degree of abdominal wall T21.03 - Burn of unspecified degree of upper back T21.04 - Burn of unspecified degree of lower back T21.05 - Burn of unspecified degree of buttock T21.06 - Burn of unspecified degree of male genital region T21.07 - Burn of unspecified degree of female genital region T21.09 - Burn of unspecified degree of other site of trunk T21.1 - Burn of first degree of trunk T21.10 - Burn of first degree of trunk, unspecified site T21.11 - Burn of first degree of chest wall T21.12 - Burn of first degree of abdominal wall T21.13 - Burn of first degree of upper back T21.14 - Burn of first degree of lower back T21.15 - Burn of first degree of buttock T21.16 - Burn of first degree of male genital region T21.17 - Burn of first degree of female genital region T21.19 - Burn of first degree of other site of trunk T21.2 - Burn of second degree of trunk T21.20 - Burn of second degree of trunk, unspecified site T21.21 - Burn of second degree of chest wall T21.22 - Burn of second degree of abdominal wall T21.23 - Burn of second degree of upper back T21.24 - Burn of second degree of lower back T21.25 - Burn of second degree of buttock T21.26 - Burn of second degree of male genital region T21.27 - Burn of second degree of female genital region T21.29 - Burn of second degree of other site of trunk T21.3 - Burn of third degree of trunk T21.30 - Burn of third degree of trunk, unspecified site T21.31 - Burn of third degree of chest wall T21.32 - Burn of third degree of abdominal wall T21.33 - Burn of third degree of upper back T21.34 - Burn of third degree of lower back T21.35 - Burn of third degree of buttock T21.36 - Burn of third degree of male genital region T21.37 - Burn of third degree of female genital region T21.39 - Burn of third degree of other site of trunk T21.4 - Corrosion of unspecified degree of trunk T21.40 - Corrosion of unspecified degree of trunk, unspecified site T21.41 - Corrosion of unspecified degree of chest wall T21.42 - Corrosion of unspecified degree of abdominal wall T21.43 - Corrosion of unspecified degree of upper back T21.44 - Corrosion of unspecified degree of lower back T21.45 - Corrosion of unspecified degree of buttock T21.46 - Corrosion of unspecified degree of male genital region T21.47 - Corrosion of unspecified degree of female genital region T21.49 - Corrosion of unspecified degree of other site of trunk T21.5 - Corrosion of first degree of trunk T21.50 - Corrosion of first degree of trunk, unspecified site T21.51 - Corrosion of first degree of chest wall T21.52 - Corrosion of first degree of abdominal wall T21.53 - Corrosion of first degree of upper back T21.54 - Corrosion of first degree of lower back T21.55 - Corrosion of first degree of buttock T21.56 - Corrosion of first degree of male genital region T21.57 - Corrosion of first degree of female genital region T21.59 - Corrosion of first degree of other site of trunk T21.6 - Corrosion of second degree of trunk T21.60 - Corrosion of second degree of trunk, unspecified site T21.61 - Corrosion of second degree of chest wall T21.62 - Corrosion of second degree of abdominal wall T21.63 - Corrosion of second degree of upper back T21.64 - Corrosion of second degree of lower back T21.65 - Corrosion of second degree of buttock T21.66 - Corrosion of second degree of male genital region T21.67 - Corrosion of second degree of female genital region T21.69 - Corrosion of second degree of other site of trunk T21.7 - Corrosion of third degree of trunk T21.70 - Corrosion of third degree of trunk, unspecified site T21.71 - Corrosion of third degree of chest wall T21.72 - Corrosion of third degree of abdominal wall T21.73 - Corrosion of third degree of upper back T21.74 - Corrosion of third degree of lower back T21.75 - Corrosion of third degree of buttock T21.76 - Corrosion of third degree of male genital region T21.77 - Corrosion of third degree of female genital region T21.79 - Corrosion of third degree of other site of trunk

About ICD-10-CM Code T21 (Burn and corrosion of trunk)

ICD-10-CM code T21 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM T21 became effective on October 1, 2024.

This page provides detailed information about T21 - Burn and corrosion of trunk. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Burn and corrosion of trunk.