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ICD-10-CM-2023 Diagnosis Codes Overview
ICD-10-CM-2023 > S00-T88 > T20-T25 > T21
T20-T25
Burns and corrosions of external body surface, specified by site
Incl.:
burns and corrosions of first degree [erythema]
burns and corrosions of second degree [blisters][epidermal loss]
burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]
Use add'l
code from category T31 or T32 to identify extent of body surface involved
T21

Burn and corrosion of trunk

Incl.:
burns and corrosion of hip region
Excl2.:
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)
Info:
The appropriate 7th character is to be added to each code from category T21
A - initial encounter
D - subsequent encounter
S - sequela
T21.0

Burn of unspecified degree of trunk

Use add'l
external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
T21.00
Burn of unspecified degree of trunk, unspecified site
T21.00XA
Burn of unspecified degree of trunk, unspecified site : initial encounter
T21.00XD
Burn of unspecified degree of trunk, unspecified site : subsequent encounter
T21.00XS
Burn of unspecified degree of trunk, unspecified site : sequela
T21.01
Burn of unspecified degree of chest wall
Info:
Burn of unspecified degree of breast
T21.01XA
Burn of unspecified degree of chest wall : initial encounter
T21.01XD
Burn of unspecified degree of chest wall : subsequent encounter
T21.01XS
Burn of unspecified degree of chest wall : sequela
T21.02
Burn of unspecified degree of abdominal wall
Info:
Burn of unspecified degree of flank
Burn of unspecified degree of groin
T21.02XA
Burn of unspecified degree of abdominal wall : initial encounter
T21.02XD
Burn of unspecified degree of abdominal wall : subsequent encounter
T21.02XS
Burn of unspecified degree of abdominal wall : sequela
T21.03
Burn of unspecified degree of upper back
Info:
Burn of unspecified degree of interscapular region
T21.03XA
Burn of unspecified degree of upper back : initial encounter
T21.03XD
Burn of unspecified degree of upper back : subsequent encounter
T21.03XS
Burn of unspecified degree of upper back : sequela
T21.04
Burn of unspecified degree of lower back
T21.04XA
Burn of unspecified degree of lower back : initial encounter
T21.04XD
Burn of unspecified degree of lower back : subsequent encounter
T21.04XS
Burn of unspecified degree of lower back : sequela
T21.05
Burn of unspecified degree of buttock
Info:
Burn of unspecified degree of anus
T21.05XA
Burn of unspecified degree of buttock : initial encounter
T21.05XD
Burn of unspecified degree of buttock : subsequent encounter
T21.05XS
Burn of unspecified degree of buttock : sequela
T21.06
Burn of unspecified degree of male genital region
Info:
Burn of unspecified degree of penis
Burn of unspecified degree of scrotum
Burn of unspecified degree of testis
T21.06XA
Burn of unspecified degree of male genital region : initial encounter
T21.06XD
Burn of unspecified degree of male genital region : subsequent encounter
T21.06XS
Burn of unspecified degree of male genital region : sequela
T21.07
Burn of unspecified degree of female genital region
Info:
Burn of unspecified degree of labium (majus) (minus)
Burn of unspecified degree of perineum
Burn of unspecified degree of vulva
Excl2.:
burn of vagina (T28.3)
T21.07XA
Burn of unspecified degree of female genital region : initial encounter
T21.07XD
Burn of unspecified degree of female genital region : subsequent encounter
T21.07XS
Burn of unspecified degree of female genital region : sequela
T21.09
Burn of unspecified degree of other site of trunk
T21.09XA
Burn of unspecified degree of other site of trunk : initial encounter
T21.09XD
Burn of unspecified degree of other site of trunk : subsequent encounter
T21.09XS
Burn of unspecified degree of other site of trunk : sequela
T21.1

Burn of first degree of trunk

Use add'l
external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
T21.10
Burn of first degree of trunk, unspecified site
T21.10XA
Burn of first degree of trunk, unspecified site : initial encounter
T21.10XD
Burn of first degree of trunk, unspecified site : subsequent encounter
T21.10XS
Burn of first degree of trunk, unspecified site : sequela
T21.11
Burn of first degree of chest wall
Info:
Burn of first degree of breast
T21.11XA
Burn of first degree of chest wall : initial encounter
T21.11XD
Burn of first degree of chest wall : subsequent encounter
T21.11XS
Burn of first degree of chest wall : sequela
T21.12
Burn of first degree of abdominal wall
Info:
Burn of first degree of flank
Burn of first degree of groin
T21.12XA
Burn of first degree of abdominal wall : initial encounter
T21.12XD
Burn of first degree of abdominal wall : subsequent encounter
T21.12XS
Burn of first degree of abdominal wall : sequela
T21.13
Burn of first degree of upper back
Info:
Burn of first degree of interscapular region
T21.13XA
Burn of first degree of upper back : initial encounter
T21.13XD
Burn of first degree of upper back : subsequent encounter
T21.13XS
Burn of first degree of upper back : sequela
T21.14
Burn of first degree of lower back
T21.14XA
Burn of first degree of lower back : initial encounter
T21.14XD
Burn of first degree of lower back : subsequent encounter
T21.14XS
Burn of first degree of lower back : sequela
T21.15
Burn of first degree of buttock
Info:
Burn of first degree of anus
T21.15XA
Burn of first degree of buttock : initial encounter
T21.15XD
Burn of first degree of buttock : subsequent encounter
T21.15XS
Burn of first degree of buttock : sequela
T21.16
Burn of first degree of male genital region
Info:
Burn of first degree of penis
Burn of first degree of scrotum
Burn of first degree of testis
T21.16XA
Burn of first degree of male genital region : initial encounter
T21.16XD
Burn of first degree of male genital region : subsequent encounter
T21.16XS
Burn of first degree of male genital region : sequela
T21.17
Burn of first degree of female genital region
Info:
Burn of first degree of labium (majus) (minus)
Burn of first degree of perineum
Burn of first degree of vulva
Excl2.:
burn of vagina (T28.3)
T21.17XA
Burn of first degree of female genital region : initial encounter
T21.17XD
Burn of first degree of female genital region : subsequent encounter
T21.17XS
Burn of first degree of female genital region : sequela
T21.19
Burn of first degree of other site of trunk
T21.19XA
Burn of first degree of other site of trunk : initial encounter
T21.19XD
Burn of first degree of other site of trunk : subsequent encounter
T21.19XS
Burn of first degree of other site of trunk : sequela
T21.2

Burn of second degree of trunk

Use add'l
external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
T21.20
Burn of second degree of trunk, unspecified site
T21.20XA
Burn of second degree of trunk, unspecified site : initial encounter
T21.20XD
Burn of second degree of trunk, unspecified site : subsequent encounter
T21.20XS
Burn of second degree of trunk, unspecified site : sequela
T21.21
Burn of second degree of chest wall
Info:
Burn of second degree of breast
T21.21XA
Burn of second degree of chest wall : initial encounter
T21.21XD
Burn of second degree of chest wall : subsequent encounter
T21.21XS
Burn of second degree of chest wall : sequela
T21.22
Burn of second degree of abdominal wall
Info:
Burn of second degree of flank
Burn of second degree of groin
T21.22XA
Burn of second degree of abdominal wall : initial encounter
T21.22XD
Burn of second degree of abdominal wall : subsequent encounter
T21.22XS
Burn of second degree of abdominal wall : sequela
T21.23
Burn of second degree of upper back
Info:
Burn of second degree of interscapular region
T21.23XA
Burn of second degree of upper back : initial encounter
T21.23XD
Burn of second degree of upper back : subsequent encounter
T21.23XS
Burn of second degree of upper back : sequela
T21.24
Burn of second degree of lower back
T21.24XA
Burn of second degree of lower back : initial encounter
T21.24XD
Burn of second degree of lower back : subsequent encounter
T21.24XS
Burn of second degree of lower back : sequela
T21.25
Burn of second degree of buttock
Info:
Burn of second degree of anus
T21.25XA
Burn of second degree of buttock : initial encounter
T21.25XD
Burn of second degree of buttock : subsequent encounter
T21.25XS
Burn of second degree of buttock : sequela
T21.26
Burn of second degree of male genital region
Info:
Burn of second degree of penis
Burn of second degree of scrotum
Burn of second degree of testis
T21.26XA
Burn of second degree of male genital region : initial encounter
T21.26XD
Burn of second degree of male genital region : subsequent encounter
T21.26XS
Burn of second degree of male genital region : sequela
T21.27
Burn of second degree of female genital region
Info:
Burn of second degree of labium (majus) (minus)
Burn of second degree of perineum
Burn of second degree of vulva
Excl2.:
burn of vagina (T28.3)
T21.27XA
Burn of second degree of female genital region : initial encounter
T21.27XD
Burn of second degree of female genital region : subsequent encounter
T21.27XS
Burn of second degree of female genital region : sequela
T21.29
Burn of second degree of other site of trunk
T21.29XA
Burn of second degree of other site of trunk : initial encounter
T21.29XD
Burn of second degree of other site of trunk : subsequent encounter
T21.29XS
Burn of second degree of other site of trunk : sequela
T21.3

Burn of third degree of trunk

Use add'l
external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92)
T21.30
Burn of third degree of trunk, unspecified site
T21.30XA
Burn of third degree of trunk, unspecified site : initial encounter
T21.30XD
Burn of third degree of trunk, unspecified site : subsequent encounter
T21.30XS
Burn of third degree of trunk, unspecified site : sequela
T21.31
Burn of third degree of chest wall
Info:
Burn of third degree of breast
T21.31XA
Burn of third degree of chest wall : initial encounter
T21.31XD
Burn of third degree of chest wall : subsequent encounter
T21.31XS
Burn of third degree of chest wall : sequela
T21.32
Burn of third degree of abdominal wall
Info:
Burn of third degree of flank
Burn of third degree of groin
T21.32XA
Burn of third degree of abdominal wall : initial encounter
T21.32XD
Burn of third degree of abdominal wall : subsequent encounter
T21.32XS
Burn of third degree of abdominal wall : sequela
T21.33
Burn of third degree of upper back
Info:
Burn of third degree of interscapular region
T21.33XA
Burn of third degree of upper back : initial encounter
T21.33XD
Burn of third degree of upper back : subsequent encounter
T21.33XS
Burn of third degree of upper back : sequela
T21.34
Burn of third degree of lower back
T21.34XA
Burn of third degree of lower back : initial encounter
T21.34XD
Burn of third degree of lower back : subsequent encounter
T21.34XS
Burn of third degree of lower back : sequela
T21.35
Burn of third degree of buttock
Info:
Burn of third degree of anus
T21.35XA
Burn of third degree of buttock : initial encounter
T21.35XD
Burn of third degree of buttock : subsequent encounter
T21.35XS
Burn of third degree of buttock : sequela
T21.36
Burn of third degree of male genital region
Info:
Burn of third degree of penis
Burn of third degree of scrotum
Burn of third degree of testis
T21.36XA
Burn of third degree of male genital region : initial encounter
T21.36XD
Burn of third degree of male genital region : subsequent encounter
T21.36XS
Burn of third degree of male genital region : sequela
T21.37
Burn of third degree of female genital region
Info:
Burn of third degree of labium (majus) (minus)
Burn of third degree of perineum
Burn of third degree of vulva
Excl2.:
burn of vagina (T28.3)
T21.37XA
Burn of third degree of female genital region : initial encounter
T21.37XD
Burn of third degree of female genital region : subsequent encounter
T21.37XS
Burn of third degree of female genital region : sequela
T21.39
Burn of third degree of other site of trunk
T21.39XA
Burn of third degree of other site of trunk : initial encounter
T21.39XD
Burn of third degree of other site of trunk : subsequent encounter
T21.39XS
Burn of third degree of other site of trunk : sequela
T21.4

Corrosion of unspecified degree of trunk

Code first
(T51-T65) to identify chemical and intent
Use add'l
external cause code to identify place (Y92)
T21.40
Corrosion of unspecified degree of trunk, unspecified site
T21.40XA
Corrosion of unspecified degree of trunk, unspecified site : initial encounter
T21.40XD
Corrosion of unspecified degree of trunk, unspecified site : subsequent encounter
T21.40XS
Corrosion of unspecified degree of trunk, unspecified site : sequela
T21.41
Corrosion of unspecified degree of chest wall
Info:
Corrosion of unspecified degree of breast
T21.41XA
Corrosion of unspecified degree of chest wall : initial encounter
T21.41XD
Corrosion of unspecified degree of chest wall : subsequent encounter
T21.41XS
Corrosion of unspecified degree of chest wall : sequela
T21.42
Corrosion of unspecified degree of abdominal wall
Info:
Corrosion of unspecified degree of flank
Corrosion of unspecified degree of groin
T21.42XA
Corrosion of unspecified degree of abdominal wall : initial encounter
T21.42XD
Corrosion of unspecified degree of abdominal wall : subsequent encounter
T21.42XS
Corrosion of unspecified degree of abdominal wall : sequela
T21.43
Corrosion of unspecified degree of upper back
Info:
Corrosion of unspecified degree of interscapular region
T21.43XA
Corrosion of unspecified degree of upper back : initial encounter
T21.43XD
Corrosion of unspecified degree of upper back : subsequent encounter
T21.43XS
Corrosion of unspecified degree of upper back : sequela
T21.44
Corrosion of unspecified degree of lower back
T21.44XA
Corrosion of unspecified degree of lower back : initial encounter
T21.44XD
Corrosion of unspecified degree of lower back : subsequent encounter
T21.44XS
Corrosion of unspecified degree of lower back : sequela
T21.45
Corrosion of unspecified degree of buttock
Info:
Corrosion of unspecified degree of anus
T21.45XA
Corrosion of unspecified degree of buttock : initial encounter
T21.45XD
Corrosion of unspecified degree of buttock : subsequent encounter
T21.45XS
Corrosion of unspecified degree of buttock : sequela
T21.46
Corrosion of unspecified degree of male genital region
Info:
Corrosion of unspecified degree of penis
Corrosion of unspecified degree of scrotum
Corrosion of unspecified degree of testis
T21.46XA
Corrosion of unspecified degree of male genital region : initial encounter
T21.46XD
Corrosion of unspecified degree of male genital region : subsequent encounter
T21.46XS
Corrosion of unspecified degree of male genital region : sequela
T21.47
Corrosion of unspecified degree of female genital region
Info:
Corrosion of unspecified degree of labium (majus) (minus)
Corrosion of unspecified degree of perineum
Corrosion of unspecified degree of vulva
Excl2.:
corrosion of vagina (T28.8)
T21.47XA
Corrosion of unspecified degree of female genital region : initial encounter
T21.47XD
Corrosion of unspecified degree of female genital region : subsequent encounter
T21.47XS
Corrosion of unspecified degree of female genital region : sequela
T21.49
Corrosion of unspecified degree of other site of trunk
T21.49XA
Corrosion of unspecified degree of other site of trunk : initial encounter
T21.49XD
Corrosion of unspecified degree of other site of trunk : subsequent encounter
T21.49XS
Corrosion of unspecified degree of other site of trunk : sequela
T21.5

Corrosion of first degree of trunk

Code first
(T51-T65) to identify chemical and intent
Use add'l
external cause code to identify place (Y92)
T21.50
Corrosion of first degree of trunk, unspecified site
T21.50XA
Corrosion of first degree of trunk, unspecified site : initial encounter
T21.50XD
Corrosion of first degree of trunk, unspecified site : subsequent encounter
T21.50XS
Corrosion of first degree of trunk, unspecified site : sequela
T21.51
Corrosion of first degree of chest wall
Info:
Corrosion of first degree of breast
T21.51XA
Corrosion of first degree of chest wall : initial encounter
T21.51XD
Corrosion of first degree of chest wall : subsequent encounter
T21.51XS
Corrosion of first degree of chest wall : sequela
T21.52
Corrosion of first degree of abdominal wall
Info:
Corrosion of first degree of flank
Corrosion of first degree of groin
T21.52XA
Corrosion of first degree of abdominal wall : initial encounter
T21.52XD
Corrosion of first degree of abdominal wall : subsequent encounter
T21.52XS
Corrosion of first degree of abdominal wall : sequela
T21.53
Corrosion of first degree of upper back
Info:
Corrosion of first degree of interscapular region
T21.53XA
Corrosion of first degree of upper back : initial encounter
T21.53XD
Corrosion of first degree of upper back : subsequent encounter
T21.53XS
Corrosion of first degree of upper back : sequela
T21.54
Corrosion of first degree of lower back
T21.54XA
Corrosion of first degree of lower back : initial encounter
T21.54XD
Corrosion of first degree of lower back : subsequent encounter
T21.54XS
Corrosion of first degree of lower back : sequela
T21.55
Corrosion of first degree of buttock
Info:
Corrosion of first degree of anus
T21.55XA
Corrosion of first degree of buttock : initial encounter
T21.55XD
Corrosion of first degree of buttock : subsequent encounter
T21.55XS
Corrosion of first degree of buttock : sequela
T21.56
Corrosion of first degree of male genital region
Info:
Corrosion of first degree of penis
Corrosion of first degree of scrotum
Corrosion of first degree of testis
T21.56XA
Corrosion of first degree of male genital region : initial encounter
T21.56XD
Corrosion of first degree of male genital region : subsequent encounter
T21.56XS
Corrosion of first degree of male genital region : sequela
T21.57
Corrosion of first degree of female genital region
Info:
Corrosion of first degree of labium (majus) (minus)
Corrosion of first degree of perineum
Corrosion of first degree of vulva
Excl2.:
corrosion of vagina (T28.8)
T21.57XA
Corrosion of first degree of female genital region : initial encounter
T21.57XD
Corrosion of first degree of female genital region : subsequent encounter
T21.57XS
Corrosion of first degree of female genital region : sequela
T21.59
Corrosion of first degree of other site of trunk
T21.59XA
Corrosion of first degree of other site of trunk : initial encounter
T21.59XD
Corrosion of first degree of other site of trunk : subsequent encounter
T21.59XS
Corrosion of first degree of other site of trunk : sequela
T21.6

Corrosion of second degree of trunk

Code first
(T51-T65) to identify chemical and intent
Use add'l
external cause code to identify place (Y92)
T21.60
Corrosion of second degree of trunk, unspecified site
T21.60XA
Corrosion of second degree of trunk, unspecified site : initial encounter
T21.60XD
Corrosion of second degree of trunk, unspecified site : subsequent encounter
T21.60XS
Corrosion of second degree of trunk, unspecified site : sequela
T21.61
Corrosion of second degree of chest wall
Info:
Corrosion of second degree of breast
T21.61XA
Corrosion of second degree of chest wall : initial encounter
T21.61XD
Corrosion of second degree of chest wall : subsequent encounter
T21.61XS
Corrosion of second degree of chest wall : sequela
T21.62
Corrosion of second degree of abdominal wall
Info:
Corrosion of second degree of flank
Corrosion of second degree of groin
T21.62XA
Corrosion of second degree of abdominal wall : initial encounter
T21.62XD
Corrosion of second degree of abdominal wall : subsequent encounter
T21.62XS
Corrosion of second degree of abdominal wall : sequela
T21.63
Corrosion of second degree of upper back
Info:
Corrosion of second degree of interscapular region
T21.63XA
Corrosion of second degree of upper back : initial encounter
T21.63XD
Corrosion of second degree of upper back : subsequent encounter
T21.63XS
Corrosion of second degree of upper back : sequela
T21.64
Corrosion of second degree of lower back
T21.64XA
Corrosion of second degree of lower back : initial encounter
T21.64XD
Corrosion of second degree of lower back : subsequent encounter
T21.64XS
Corrosion of second degree of lower back : sequela
T21.65
Corrosion of second degree of buttock
Info:
Corrosion of second degree of anus
T21.65XA
Corrosion of second degree of buttock : initial encounter
T21.65XD
Corrosion of second degree of buttock : subsequent encounter
T21.65XS
Corrosion of second degree of buttock : sequela
T21.66
Corrosion of second degree of male genital region
Info:
Corrosion of second degree of penis
Corrosion of second degree of scrotum
Corrosion of second degree of testis
T21.66XA
Corrosion of second degree of male genital region : initial encounter
T21.66XD
Corrosion of second degree of male genital region : subsequent encounter
T21.66XS
Corrosion of second degree of male genital region : sequela
T21.67
Corrosion of second degree of female genital region
Info:
Corrosion of second degree of labium (majus) (minus)
Corrosion of second degree of perineum
Corrosion of second degree of vulva
Excl2.:
corrosion of vagina (T28.8)
T21.67XA
Corrosion of second degree of female genital region : initial encounter
T21.67XD
Corrosion of second degree of female genital region : subsequent encounter
T21.67XS
Corrosion of second degree of female genital region : sequela
T21.69
Corrosion of second degree of other site of trunk
T21.69XA
Corrosion of second degree of other site of trunk : initial encounter
T21.69XD
Corrosion of second degree of other site of trunk : subsequent encounter
T21.69XS
Corrosion of second degree of other site of trunk : sequela
T21.7

Corrosion of third degree of trunk

Code first
(T51-T65) to identify chemical and intent
Use add'l
external cause code to identify place (Y92)
T21.70
Corrosion of third degree of trunk, unspecified site
T21.70XA
Corrosion of third degree of trunk, unspecified site : initial encounter
T21.70XD
Corrosion of third degree of trunk, unspecified site : subsequent encounter
T21.70XS
Corrosion of third degree of trunk, unspecified site : sequela
T21.71
Corrosion of third degree of chest wall
Info:
Corrosion of third degree of breast
T21.71XA
Corrosion of third degree of chest wall : initial encounter
T21.71XD
Corrosion of third degree of chest wall : subsequent encounter
T21.71XS
Corrosion of third degree of chest wall : sequela
T21.72
Corrosion of third degree of abdominal wall
Info:
Corrosion of third degree of flank
Corrosion of third degree of groin
T21.72XA
Corrosion of third degree of abdominal wall : initial encounter
T21.72XD
Corrosion of third degree of abdominal wall : subsequent encounter
T21.72XS
Corrosion of third degree of abdominal wall : sequela
T21.73
Corrosion of third degree of upper back
Info:
Corrosion of third degree of interscapular region
T21.73XA
Corrosion of third degree of upper back : initial encounter
T21.73XD
Corrosion of third degree of upper back : subsequent encounter
T21.73XS
Corrosion of third degree of upper back : sequela
T21.74
Corrosion of third degree of lower back
T21.74XA
Corrosion of third degree of lower back : initial encounter
T21.74XD
Corrosion of third degree of lower back : subsequent encounter
T21.74XS
Corrosion of third degree of lower back : sequela
T21.75
Corrosion of third degree of buttock
Info:
Corrosion of third degree of anus
T21.75XA
Corrosion of third degree of buttock : initial encounter
T21.75XD
Corrosion of third degree of buttock : subsequent encounter
T21.75XS
Corrosion of third degree of buttock : sequela
T21.76
Corrosion of third degree of male genital region
Info:
Corrosion of third degree of penis
Corrosion of third degree of scrotum
Corrosion of third degree of testis
T21.76XA
Corrosion of third degree of male genital region : initial encounter
T21.76XD
Corrosion of third degree of male genital region : subsequent encounter
T21.76XS
Corrosion of third degree of male genital region : sequela
T21.77
Corrosion of third degree of female genital region
Info:
Corrosion of third degree of labium (majus) (minus)
Corrosion of third degree of perineum
Corrosion of third degree of vulva
Excl2.:
corrosion of vagina (T28.8)
T21.77XA
Corrosion of third degree of female genital region : initial encounter
T21.77XD
Corrosion of third degree of female genital region : subsequent encounter
T21.77XS
Corrosion of third degree of female genital region : sequela
T21.79
Corrosion of third degree of other site of trunk
T21.79XA
Corrosion of third degree of other site of trunk : initial encounter
T21.79XD
Corrosion of third degree of other site of trunk : subsequent encounter
T21.79XS
Corrosion of third degree of other site of trunk : sequela

 

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