T33Not billable, use a more specific code below
Superficial frostbite
In Frostbite (T33-T34), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes
111 billable codes under T33: 37 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Instructional notes
Includes: conditions that are coded here
- frostbite with partial thickness skin loss
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers 7th character use and coding of injuries, fractures, burns, drug and toxic effects, abuse and neglect, and complications of care (S00-T88).
- Application of 7th Characters in Chapter 19 (page 77)
- Coding of Injuries (page 78)
- Coding of Traumatic Fractures (page 79)
- Coding of Burns and Corrosions (page 80)
- Adverse Effects, Poisoning, Underdosing and Toxic Effects (page 82)
- Adult and child abuse, neglect and other maltreatment (page 85)
- Complications of care (page 85)
All codes under T33
T33 can't be used on a claim. Pick a billable code below; grey headings group them.
- T33.0Superficial frostbite of head
- T33.01Superficial frostbite of ear
- T33.011Superficial frostbite of right ear
- T33.011ASuperficial frostbite of right ear, initial encounter
- T33.011DSuperficial frostbite of right ear, subsequent encounter
- T33.011SSuperficial frostbite of right ear, sequela
- T33.012Superficial frostbite of left ear
- T33.012ASuperficial frostbite of left ear, initial encounter
- T33.012DSuperficial frostbite of left ear, subsequent encounter
- T33.012SSuperficial frostbite of left ear, sequela
- T33.019Superficial frostbite of unspecified ear
- T33.019ASuperficial frostbite of unspecified ear, initial encounter
- T33.019DSuperficial frostbite of unspecified ear, subsequent encounter
- T33.019SSuperficial frostbite of unspecified ear, sequela
- T33.02Superficial frostbite of nose
- T33.02XASuperficial frostbite of nose, initial encounter
- T33.02XDSuperficial frostbite of nose, subsequent encounter
- T33.02XSSuperficial frostbite of nose, sequela
- T33.09Superficial frostbite of other part of head
- T33.09XASuperficial frostbite of other part of head, initial encounter
- T33.09XDSuperficial frostbite of other part of head, subsequent encounter
- T33.09XSSuperficial frostbite of other part of head, sequela
- T33.1Superficial frostbite of neck
- T33.1XXASuperficial frostbite of neck, initial encounter
- T33.1XXDSuperficial frostbite of neck, subsequent encounter
- T33.1XXSSuperficial frostbite of neck, sequela
- T33.2Superficial frostbite of thorax
- T33.2XXASuperficial frostbite of thorax, initial encounter
- T33.2XXDSuperficial frostbite of thorax, subsequent encounter
- T33.2XXSSuperficial frostbite of thorax, sequela
- T33.3Superficial frostbite of abdominal wall, lower back and pelvis
- T33.3XXASuperficial frostbite of abdominal wall, lower back and pelvis, initial encounter
- T33.3XXDSuperficial frostbite of abdominal wall, lower back and pelvis, subsequent encounter
- T33.3XXSSuperficial frostbite of abdominal wall, lower back and pelvis, sequela
- T33.4Superficial frostbite of arm
- T33.40Superficial frostbite of unspecified arm
- T33.40XASuperficial frostbite of unspecified arm, initial encounter
- T33.40XDSuperficial frostbite of unspecified arm, subsequent encounter
- T33.40XSSuperficial frostbite of unspecified arm, sequela
- T33.41Superficial frostbite of right arm
- T33.41XASuperficial frostbite of right arm, initial encounter
- T33.41XDSuperficial frostbite of right arm, subsequent encounter
- T33.41XSSuperficial frostbite of right arm, sequela
- T33.42Superficial frostbite of left arm
- T33.42XASuperficial frostbite of left arm, initial encounter
- T33.42XDSuperficial frostbite of left arm, subsequent encounter
- T33.42XSSuperficial frostbite of left arm, sequela
- T33.5Superficial frostbite of wrist, hand, and fingers
- T33.51Superficial frostbite of wrist
- T33.511Superficial frostbite of right wrist
- T33.511ASuperficial frostbite of right wrist, initial encounter
- T33.511DSuperficial frostbite of right wrist, subsequent encounter
- T33.511SSuperficial frostbite of right wrist, sequela
- T33.512Superficial frostbite of left wrist
- T33.512ASuperficial frostbite of left wrist, initial encounter
- T33.512DSuperficial frostbite of left wrist, subsequent encounter
- T33.512SSuperficial frostbite of left wrist, sequela
- T33.519Superficial frostbite of unspecified wrist
- T33.519ASuperficial frostbite of unspecified wrist, initial encounter
- T33.519DSuperficial frostbite of unspecified wrist, subsequent encounter
- T33.519SSuperficial frostbite of unspecified wrist, sequela
- T33.52Superficial frostbite of hand
- T33.521Superficial frostbite of right hand
- T33.521ASuperficial frostbite of right hand, initial encounter
- T33.521DSuperficial frostbite of right hand, subsequent encounter
- T33.521SSuperficial frostbite of right hand, sequela
- T33.522Superficial frostbite of left hand
- T33.522ASuperficial frostbite of left hand, initial encounter
- T33.522DSuperficial frostbite of left hand, subsequent encounter
- T33.522SSuperficial frostbite of left hand, sequela
- T33.529Superficial frostbite of unspecified hand
- T33.529ASuperficial frostbite of unspecified hand, initial encounter
- T33.529DSuperficial frostbite of unspecified hand, subsequent encounter
- T33.529SSuperficial frostbite of unspecified hand, sequela
- T33.53Superficial frostbite of finger(s)
- T33.531Superficial frostbite of right finger(s)
- T33.531ASuperficial frostbite of right finger(s), initial encounter
- T33.531DSuperficial frostbite of right finger(s), subsequent encounter
- T33.531SSuperficial frostbite of right finger(s), sequela
- T33.532Superficial frostbite of left finger(s)
- T33.532ASuperficial frostbite of left finger(s), initial encounter
- T33.532DSuperficial frostbite of left finger(s), subsequent encounter
- T33.532SSuperficial frostbite of left finger(s), sequela
- T33.539Superficial frostbite of unspecified finger(s)
- T33.539ASuperficial frostbite of unspecified finger(s), initial encounter
- T33.539DSuperficial frostbite of unspecified finger(s), subsequent encounter
- T33.539SSuperficial frostbite of unspecified finger(s), sequela
- T33.6Superficial frostbite of hip and thigh
- T33.60Superficial frostbite of unspecified hip and thigh
- T33.60XASuperficial frostbite of unspecified hip and thigh, initial encounter
- T33.60XDSuperficial frostbite of unspecified hip and thigh, subsequent encounter
- T33.60XSSuperficial frostbite of unspecified hip and thigh, sequela
- T33.61Superficial frostbite of right hip and thigh
- T33.61XASuperficial frostbite of right hip and thigh, initial encounter
- T33.61XDSuperficial frostbite of right hip and thigh, subsequent encounter
- T33.61XSSuperficial frostbite of right hip and thigh, sequela
- T33.62Superficial frostbite of left hip and thigh
- T33.62XASuperficial frostbite of left hip and thigh, initial encounter
- T33.62XDSuperficial frostbite of left hip and thigh, subsequent encounter
- T33.62XSSuperficial frostbite of left hip and thigh, sequela
- T33.7Superficial frostbite of knee and lower leg
- T33.70Superficial frostbite of unspecified knee and lower leg
- T33.70XASuperficial frostbite of unspecified knee and lower leg, initial encounter
- T33.70XDSuperficial frostbite of unspecified knee and lower leg, subsequent encounter
- T33.70XSSuperficial frostbite of unspecified knee and lower leg, sequela
- T33.71Superficial frostbite of right knee and lower leg
- T33.71XASuperficial frostbite of right knee and lower leg, initial encounter
- T33.71XDSuperficial frostbite of right knee and lower leg, subsequent encounter
- T33.71XSSuperficial frostbite of right knee and lower leg, sequela
- T33.72Superficial frostbite of left knee and lower leg
- T33.72XASuperficial frostbite of left knee and lower leg, initial encounter
- T33.72XDSuperficial frostbite of left knee and lower leg, subsequent encounter
- T33.72XSSuperficial frostbite of left knee and lower leg, sequela
- T33.8Superficial frostbite of ankle, foot, and toe(s)
- T33.81Superficial frostbite of ankle
- T33.811Superficial frostbite of right ankle
- T33.811ASuperficial frostbite of right ankle, initial encounter
- T33.811DSuperficial frostbite of right ankle, subsequent encounter
- T33.811SSuperficial frostbite of right ankle, sequela
- T33.812Superficial frostbite of left ankle
- T33.812ASuperficial frostbite of left ankle, initial encounter
- T33.812DSuperficial frostbite of left ankle, subsequent encounter
- T33.812SSuperficial frostbite of left ankle, sequela
- T33.819Superficial frostbite of unspecified ankle
- T33.819ASuperficial frostbite of unspecified ankle, initial encounter
- T33.819DSuperficial frostbite of unspecified ankle, subsequent encounter
- T33.819SSuperficial frostbite of unspecified ankle, sequela
- T33.82Superficial frostbite of foot
- T33.821Superficial frostbite of right foot
- T33.821ASuperficial frostbite of right foot, initial encounter
- T33.821DSuperficial frostbite of right foot, subsequent encounter
- T33.821SSuperficial frostbite of right foot, sequela
- T33.822Superficial frostbite of left foot
- T33.822ASuperficial frostbite of left foot, initial encounter
- T33.822DSuperficial frostbite of left foot, subsequent encounter
- T33.822SSuperficial frostbite of left foot, sequela
- T33.829Superficial frostbite of unspecified foot
- T33.829ASuperficial frostbite of unspecified foot, initial encounter
- T33.829DSuperficial frostbite of unspecified foot, subsequent encounter
- T33.829SSuperficial frostbite of unspecified foot, sequela
- T33.83Superficial frostbite of toe(s)
- T33.831Superficial frostbite of right toe(s)
- T33.831ASuperficial frostbite of right toe(s), initial encounter
- T33.831DSuperficial frostbite of right toe(s), subsequent encounter
- T33.831SSuperficial frostbite of right toe(s), sequela
- T33.832Superficial frostbite of left toe(s)
- T33.832ASuperficial frostbite of left toe(s), initial encounter
- T33.832DSuperficial frostbite of left toe(s), subsequent encounter
- T33.832SSuperficial frostbite of left toe(s), sequela
- T33.839Superficial frostbite of unspecified toe(s)
- T33.839ASuperficial frostbite of unspecified toe(s), initial encounter
- T33.839DSuperficial frostbite of unspecified toe(s), subsequent encounter
- T33.839SSuperficial frostbite of unspecified toe(s), sequela
- T33.9Superficial frostbite of other and unspecified sites
- T33.90Superficial frostbite of unspecified sites
- T33.90XASuperficial frostbite of unspecified sites, initial encounter
- T33.90XDSuperficial frostbite of unspecified sites, subsequent encounter
- T33.90XSSuperficial frostbite of unspecified sites, sequela
- T33.99Superficial frostbite of other sites
- T33.99XASuperficial frostbite of other sites, initial encounter
- T33.99XDSuperficial frostbite of other sites, subsequent encounter
- T33.99XSSuperficial frostbite of other sites, sequela
T33 MS-DRGs
As the principal diagnosis, the billable codes under T33 group to MS-DRG 922, 923, 949, or 950 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 922 Other Injury, Poisoning and Toxic Effect Diagnoses with MCC (74 of 111 codes)
- DRG 923 Other Injury, Poisoning and Toxic Effect Diagnoses without MCC (74 of 111 codes)
- DRG 949 Aftercare with CC/MCC (37 of 111 codes)
- DRG 950 Aftercare without CC/MCC (37 of 111 codes)
Other codes that refer to T33
Notes on these codes point to T33.
- I73 Excludes2: frostbite (T33-T34)
- S00-S09 Excludes2: frostbite (T33-T34)
- S10-S19 Excludes2: frostbite (T33-T34)
- S20-S29 Excludes2: frostbite (T33-T34)
- S30-S39 Excludes2: frostbite (T33-T34)
- S40-S49 Excludes2: frostbite (T33-T34)
- S50-S59 Excludes2: frostbite (T33-T34)
- S60-S69 Excludes2: frostbite (T33-T34)
- S70-S79 Excludes2: frostbite (T33-T34)
- S80-S89 Excludes2: frostbite (T33-T34)
- S90-S99 Excludes2: frostbite (T33-T34)
- T68 Excludes2: frostbite (T33-T34)
- T69 Excludes2: frostbite (T33-T34)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Frostbite
Frostbite is an injury to the body that is caused by freezing. It most often affects the nose, ears, cheeks, chin, fingers, or toes. Frostbite can permanently damage the body, and severe cases can lead to amputation.
Read more about frostbite on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.