2024 ICD-10-CM Diagnosis Code T78.3XXD

Angioneurotic edema, subsequent encounter

ICD-10-CM Code:
T78.3XXD
ICD-10 Code for:
Angioneurotic edema, subsequent encounter
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Other and unspecified effects of external causes
      (T66-T78)
      • Adverse effects, not elsewhere classified
        (T78)

T78.3XXD is a billable diagnosis code used to specify a medical diagnosis of angioneurotic edema, subsequent encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

T78.3XXD is a subsequent encounter code, includes a 7th character and should be used after the patient has completed active treatment for a condition like angioneurotic edema. According to ICD-10-CM Guidelines a "subsequent encounter" occurs when the patient is receiving routine care for the condition during the healing or recovery phase of treatment. Subsequent diagnosis codes are appropriate during the recovery phase, no matter how many times the patient has seen the provider for this condition. If the provider needs to adjust the patient's care plan due to a setback or other complication, the encounter becomes active again.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • ACE inhibitor-aggravated angioedema
  • Acquired angioedema due to C1 inhibitor autoantibody
  • Acquired angioedema due to lymphoproliferative disorder
  • Acquired angioedema type I
  • Acquired angioedema type II
  • Acquired C1 esterase inhibitor deficiency
  • Acquired C1 esterase inhibitor deficiency
  • Allergic angioedema
  • Allergic angioedema
  • Allergic angioedema
  • Allergic angioedema
  • Allergic angioedema
  • Allergic angioedema
  • Allergic angioedema due to bite and/or sting
  • Allergic angioedema due to ingested food
  • Allergic urticaria and/or angioedema
  • Allergic urticaria due to ingested food
  • Angioedema
  • Angioedema and/or urticaria
  • Angioedema due to angiotensin-converting-enzyme inhibitor
  • Angioedema due to disorder of kinin metabolism
  • Angioedema due to disorder of kinin metabolism
  • Angioedema due to disorder of kinin metabolism
  • Angioedema due to disorder of kinin metabolism
  • Angioedema due to disorder of kinin metabolism
  • Angioedema due to disorder of kinin metabolism
  • Angioedema of eyelid
  • Angioedema of lip
  • Angioedema of tongue
  • Aspirin-induced angioedema-urticaria
  • Autoimmune angioedema
  • Autoimmune angioedema
  • Autoimmune urticaria and/or angioedema
  • Autoimmune urticaria and/or angioedema
  • Azo-dye-induced angioedema-urticaria
  • Chemical-aggravated angioedema-urticaria
  • Cholinergic angioedema
  • Disorder of eosinophil
  • Drug-aggravated angioedema-urticaria
  • Drug-induced angioedema-urticaria
  • Drug-induced angioedema-urticaria
  • Drug-induced angioedema-urticaria
  • Edema of oral soft tissues
  • Edema of oral soft tissues
  • Edema of the tongue
  • Episodic angioedema with eosinophilia
  • Food-induced angioedema-urticaria
  • Giant urticaria
  • Hevea brasiliensis latex protein-induced angioedema-urticaria
  • Idiopathic angioedema
  • Idiopathic urticaria and/or angioedema
  • Intestinal angioedema caused by angiotensin-converting enzyme inhibitor
  • NSAID-induced angioedema-urticaria
  • NSAID-induced angioedema-urticaria
  • Penicillin-induced angioedema-urticaria
  • Physical angioedema
  • Physical angioedema
  • Respiratory angioedema
  • Sodium benzoate-induced angioedema-urticaria
  • Urticaria caused by food additive
  • Urticaria due to salicylate
  • Urticaria medicamentosa
  • Urticaria medicamentosa
  • Urticaria medicamentosa
  • Urticaria medicamentosa
  • Venom-induced angioedema-urticaria
  • Vibratory angioedema

Clinical Classification

Clinical Information

  • Angioedema

    swelling involving the deep dermis, subcutaneous, or submucosal tissues, representing localized edema. angioedema often occurs in the face, lips, tongue, and larynx.
  • Angioedemas, Hereditary

    inherited disorders that are characterized by subcutaneous and submucosal edema in the upper respiratory tract and gastrointestinal tract.
  • Hereditary Angioedema Type III

    a form of hereditary angioedema that occurs in women and is precipitated or worsened by high estrogen levels. it is associated with mutations in the gene for factor xii that result in its increased activity.
  • Hereditary Angioedema Types I and II

    forms of hereditary angioedema that occur due to mutations in the gene for complement c1 inhibitor protein. type i hereditary angioedema is associated with reduced serum levels of complement c1 inhibitor protein. type ii hereditary angioedema is associated with the production of a non-functional complement c1 inhibitor protein.
  • Angioedema

    rapid swelling of the deep layers of the skin due to transient vascular leakage of serous fluid.
  • Hereditary Angioedema

    autosomal dominant inherited disorder characterized by abnormalities of c1 inhibitor. patients present with swelling of the skin, subcutaneous tissues, and mucosa sites.
  • Hereditary Angioedema Types I and II

    autosomal dominant inherited disorders characterized by abnormalities of c1 inhibitor. patients present with swelling of the skin, subcutaneous tissues, and mucosa sites. in type i hereditary angioedema, the plasma levels of c1 inhibitor are decreased. in type ii hereditary angioedema, the c1 inhibitor is dysfunctional and its plasma levels may be normal or elevated.
  • SERPING1 wt Allele|Angioedema, Hereditary Gene|C1IN|C1INH|C1NH|HAE1|HAE2|Serine (or Cysteine) Proteinase Inhibitor, Clade G (C1 Inhibitor), Member 1, (Angioedema, Hereditary) Gene|Serine/Cysteine Proteinase Inhibitor Clade G Member 1 Gene|Serpin Family G Member 1 wt Allele|Serpin Peptidase Inhibitor, Clade G (C1 Inhibitor), Member 1 Gene|Serpin Peptidase Inhibitor, Clade G, Member 1 Gene

    human serping1 wild-type allele is located in the vicinity of 11q12.1 and is approximately 22 kb in length. this allele, which encodes plasma protease c1 inhibitor protein, plays a role in serine proteinase inhibition. mutation of the gene is associated with hereditary angioedema types 1 and 2 and partial deficiency of complement component 4.

Coding Guidelines

The appropriate 7th character is to be added to each code from block Adverse effects, not elsewhere classified (T78). Use the following options for the aplicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Present on Admission (POA)

T78.3XXD is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA IndicatorReason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Convert T78.3XXD to ICD-9-CM

  • ICD-9-CM Code: V58.89 - Other specfied aftercare
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


Allergy

An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are:

  • Pollen
  • Dust mites
  • Mold spores
  • Pet dander
  • Food
  • Insect stings
  • Medicines

Normally, your immune system fights germs. It is your body's defense system. In most allergic reactions, however, it is responding to a false alarm. Genes and the environment probably both play a role.

Allergies can cause a variety of symptoms such as a runny nose, sneezing, itching, rashes, swelling, or asthma. Allergies can range from minor to severe. Anaphylaxis is a severe reaction that can be life-threatening. Doctors use skin and blood tests to diagnose allergies. Treatments include medicines, allergy shots, and avoiding the substances that cause the reactions.


[Learn More in MedlinePlus]

Edema

Edema means swelling caused by fluid in your body's tissues. It usually occurs in the feet, ankles and legs, but it can involve your entire body.

Causes of edema include:

  • Eating too much salt
  • Sunburn
  • Heart failure
  • Kidney disease
  • Liver problems from cirrhosis
  • Pregnancy
  • Problems with lymph nodes, especially after mastectomy
  • Some medicines
  • Standing or walking a lot when the weather is warm

To keep swelling down, your health care provider may recommend keeping your legs raised when sitting, wearing support stockings, limiting how much salt you eat, or taking a medicine called a diuretic - also called a water pill.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.