2021

  1. ICD-10-CM Codes
    2. ›
  2. S00-T88 Injury, poisoning and certain other consequences of external causes
    3. ›
  3. T66-T78 Other and unspecified effects of external causes
    4. ›
  4. T78- Adverse effects, not elsewhere classified
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code T78.3

2021 ICD-10-CM Diagnosis Code T78.3

Angioneurotic edema

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • T78.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM T78.3 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of T78.3 - other international versions of ICD-10 T78.3 may differ.
Applicable To
  • Allergic angioedema
  • Giant urticaria
  • Quincke's edema
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as T78.3. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • serum urticaria (
    ICD-10-CM Diagnosis Code T80.6

    Other serum reactions

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Intoxication by serum
    • Protein sickness
    • Serum rash
    • Serum sickness
    • Serum urticaria
    Type 2 Excludes
    T80.6-
    )
  • urticaria (
    ICD-10-CM Diagnosis Code L50
    • L50 Urticaria
      • L50.0 Allergic urticaria
      • L50.1 Idiopathic urticaria
      • L50.2 Urticaria due to cold and heat
      • L50.3 Dermatographic urticaria
      • L50.4 Vibratory urticaria
      • L50.5 Cholinergic urticaria
      • L50.6 Contact urticaria
      • L50.8 Other urticaria
      • L50.9 Urticaria, unspecified
    L50.-
    )
The following code(s) above T78.3 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to T78.3:
  • S00-T88
    2021 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    Note
    • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • T78
    ICD-10-CM Diagnosis Code T78

    Adverse effects, not elsewhere classified

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • complications of surgical and medical care NEC (T80-T88)
    Adverse effects, not elsewhere classified
Clinical Information
  • Recurring attacks of transient edema suddenly appearing in areas of the skin or mucous membranes
  • Swelling involving the deep dermis, subcutaneous, or submucosal tissues, representing localized edema. Angioedema often occurs in the face, lips, tongue, and larynx.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to T78.3:
  • Type 1 Excludes: L50
    , L50
    , L50
    , R60
    ICD-10-CM Diagnosis Code L50

    Urticaria

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • allergic contact dermatitis (L23.-)
    • angioneurotic edema (T78.3)
    • giant urticaria (T78.3)
    • hereditary angio-edema (D84.1)
    • Quincke's edema (T78.3)
    • serum urticaria (T80.6-)
    • solar urticaria (L56.3)
    • urticaria neonatorum (P83.8)
    • urticaria papulosa (L28.2)
    • urticaria pigmentosa (D47.01)
    ICD-10-CM Diagnosis Code L50

    Urticaria

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • allergic contact dermatitis (L23.-)
    • angioneurotic edema (T78.3)
    • giant urticaria (T78.3)
    • hereditary angio-edema (D84.1)
    • Quincke's edema (T78.3)
    • serum urticaria (T80.6-)
    • solar urticaria (L56.3)
    • urticaria neonatorum (P83.8)
    • urticaria papulosa (L28.2)
    • urticaria pigmentosa (D47.01)
    ICD-10-CM Diagnosis Code L50

    Urticaria

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • allergic contact dermatitis (L23.-)
    • angioneurotic edema (T78.3)
    • giant urticaria (T78.3)
    • hereditary angio-edema (D84.1)
    • Quincke's edema (T78.3)
    • serum urticaria (T80.6-)
    • solar urticaria (L56.3)
    • urticaria neonatorum (P83.8)
    • urticaria papulosa (L28.2)
    • urticaria pigmentosa (D47.01)
    ICD-10-CM Diagnosis Code R60

    Edema, not elsewhere classified

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes

Diagnosis Index entries containing back-references to T78.3:

ICD-10-CM Codes Adjacent To T78.3
T78.09XD …… subsequent encounter
T78.09XS …… sequela
T78.1 Other adverse food reactions, not elsewhere classified
T78.1XXA …… initial encounter
T78.1XXD …… subsequent encounter
T78.1XXS …… sequela
T78.2 Anaphylactic shock, unspecified
T78.2XXA …… initial encounter
T78.2XXD …… subsequent encounter
T78.2XXS …… sequela
T78.3 Angioneurotic edema
T78.3XXA …… initial encounter
T78.3XXD …… subsequent encounter
T78.3XXS …… sequela
T78.4 Other and unspecified allergy
T78.40 Allergy, unspecified
T78.40XA …… initial encounter
T78.40XD …… subsequent encounter
T78.40XS …… sequela
T78.41 Arthus phenomenon
T78.41XA …… initial encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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