2026 ICD-10-CM Diagnosis Code G93.7Reye's syndrome
ICD-10-CM Codes›G00–G99›G89-G99›G93
- Billable — Valid for Submission
- Not Chronic
G93.7 is a billable ICD-10-CM diagnosis code for Reye's syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is restricted by the Medicare Code Editor to pediatric patients (age 0 through 17). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (neither hereditary nor degenerative).
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for G93.7.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Reye's syndrome
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
- poisoning due to salicylates, if applicable T39.0
Use Additional Code
- code for adverse effect due to salicylates, if applicable T39.0
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Reye's syndrome - G93.7
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Reye's syndrome
- Syndrome
- Reye's
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Reye Syndrome
Reye syndrome is a rare illness that can affect the blood, liver, and brain of someone who has recently had a viral infection. It always follows another illness. Although it mostly affects children and teens, anyone can get it. It can develop quickly and without warning. It is most common during flu season. Symptoms include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G93.7 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G93.7Overview
Is G93.7 (Other disorders of brain) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report Reye's syndrome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Who can G93.7 be reported for?
The Medicare Code Editor checks Reye's syndrome against patient demographics: this code is intended for pediatric patients (age 0 through 17). Claims outside these limits are flagged as inconsistent.
What is the ICD-9 equivalent of G93.7?
Under the General Equivalence Mappings, Reye's syndrome converts to ICD-9-CM 331.81 (Reye's syndrome). The mapping is a direct match.
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.
