ICD-10-CM Codes
R00-R99
R50-R69
R56-
2023 ICD-10-CM Diagnosis Code R56.00

2023 ICD-10-CM Diagnosis Code R56.00

Simple febrile convulsions

2016

2017

2018

2019

2020

2021

2022

2023

Billable/Specific Code

R56.00 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM R56.00 became effective on October 1, 2022.
This is the American ICD-10-CM version of R56.00 - other international versions of ICD-10 R56.00 may differ.

Applicable To

Febrile convulsion NOS
Febrile seizure NOS

The following code(s) above R56.00 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 R56.00:

R00-R99
2023 ICD-10-CM Range R00-R99
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Note
- This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
- Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
- The conditions and signs or symptoms included in categories R00-R94 consist of:
- (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
- (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
- (c) provisional diagnosis in a patient who failed to return for further investigation or care;
- (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
- (e) cases in which a more precise diagnosis was not available for any other reason;
- (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
Type 2 Excludes
- abnormal findings on antenatal screening of mother (O28.-)
- certain conditions originating in the perinatal period (P04-P96)
- signs and symptoms classified in the body system chapters
- signs and symptoms of breast (N63, N64.5)
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
R56
ICD-10-CM Diagnosis Code R56
Convulsions, not elsewhere classified
Type 1 Excludes
- dissociative convulsions and seizures (F44.5)
- epileptic convulsions and seizures (G40.-)
- newborn convulsions and seizures (P90)
Convulsions, not elsewhere classified

Approximate Synonyms

Febrile convulsion
Febrile seizure (from fever)
Febrile seizure, simple
Simple febrile seizure

Clinical Information

Seizures that occur during a febrile episode. It is a common condition, affecting 2-5% of children aged 3 months to five years. An autosomal dominant pattern of inheritance has been identified in some families. The majority are simple febrile seizures (generally defined as generalized onset, single seizures with a duration of less than 30 minutes). Complex febrile seizures are characterized by focal onset, duration greater than 30 minutes, and/or more than one seizure in a 24 hour period. The likelihood of developing epilepsy (i.e., a nonfebrile seizure disorder) following simple febrile seizures is low. Complex febrile seizures are associated with a moderately increased incidence of epilepsy. (from menkes, textbook of child neurology, 5th ed, p784)
Seizures that occur during a fever; a common condition, affecting 2-5% of children aged 3 months to five years; majority are simple febrile seizures (generally defined as generalized onset, single seizures with a duration of less than 30 minutes); complex febrile seizures are characterized by focal onset, duration greater than 30 minutes, and/or more than one seizure in a 24 hour period.

ICD-10-CM R56.00 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

100 Seizures with mcc
101 Seizures without mcc
791 Prematurity with major problems
793 Full term neonate with major problems

Convert R56.00 to ICD-9-CM

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
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to R56.00:

Convulsions (idiopathic) R56.9
- see also Seizure(s)
ICD-10-CM Diagnosis Code R56.9
Unspecified convulsions
Applicable To
Convulsion disorder
Fit NOS
Recurrent convulsions
Seizure(s) (convulsive) NOS
- febrile R56.00
  - simple R56.00
Seizure(s) R56.9
- see also Convulsions
ICD-10-CM Diagnosis Code R56.9
Unspecified convulsions
Applicable To
Convulsion disorder
Fit NOS
Recurrent convulsions
Seizure(s) (convulsive) NOS
- febrile (simple) R56.00

ICD-10-CM Codes Adjacent To R56.00

R53.1 Weakness

R53.2 Functional quadriplegia

R53.8 Other malaise and fatigue

R53.81 Other malaise

R53.82 Chronic fatigue, unspecified

R53.83 Other fatigue

R54 Age-related physical debility

R55 Syncope and collapse

R56 Convulsions, not elsewhere classified

R56.0 Febrile convulsions

R56.00 Simple febrile convulsions

R56.01 Complex febrile convulsions

R56.1 Post traumatic seizures

R56.9 Unspecified convulsions

R57 Shock, not elsewhere classified

R57.0 Cardiogenic shock

R57.1 Hypovolemic shock

R57.8 Other shock

R57.9 Shock, unspecified

R58 Hemorrhage, not elsewhere classified

R59 Enlarged lymph nodes

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

2023 ICD-10-CM Diagnosis Code R56.00

Simple febrile convulsions

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Convulsions, not elsewhere classified

Unspecified convulsions

Unspecified convulsions