Summary & Overview

Yellow fever: ICD-10-CM Diagnosis Code Group Overview

International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) codes under the group ICD-10-CM A95 describe Yellow fever, an arthropod-borne viral illness that can present with febrile, hepatic, hemorrhagic, and systemic manifestations. Accurate ICD-10-CM coding for this group is essential for correct billing, claims adjudication, and ensuring appropriate reimbursement for services related to diagnosis and management.

Yellow feverICD-10-CM`ICD-10-CM A95`arbovirusliverhemorrhagic feverinfectious diseasemosquito-borne

Yellow fever Overview

The diagnoses in this group represent Yellow fever, an acute viral infection transmitted by infected mosquitoes that can cause fever, jaundice, hemorrhage, and multi-organ involvement. These conditions primarily affect the hepatic, vascular, and hematologic systems and may progress to severe systemic illness. Accurate coding ensures correct capture of the diagnosis for public health surveillance and is important for appropriate reimbursement processing and resource allocation.

Typical Clinical Scenarios

An adult traveler returns from a region with recent yellow fever activity presenting to the emergency department with sudden high fever, severe myalgias, headache, and nausea, followed within 48 hours by jaundice and conjunctival injection. Laboratory testing shows elevated liver enzymes and thrombocytopenia; clinicians suspect classic yellow fever with hepatic involvement and admit the patient for supportive care and monitoring. Typical codes: A950
An unvaccinated child in a rural endemic area develops an acute febrile illness with malaise and retro-orbital pain; symptoms are moderate and managed in an outpatient clinic with symptomatic treatment while public health authorities investigate possible mosquito-borne transmission. A diagnosis from this group is assigned for acute yellow fever infection without severe organ dysfunction. Typical codes: A951
An older adult hospitalized after rapid deterioration from a confirmed yellow fever infection who develops hemorrhagic manifestations including gastrointestinal bleeding and coagulopathy requiring transfusion and intensive care; the severe hemorrhagic course is documented as a complication of the viral infection. Typical codes: A959

ICD-10-CM Codes

ICD-10-CM codes are structured hierarchically — each code begins with a letter representing the chapter, followed by two digits identifying the category, then a decimal point and additional characters that specify the exact condition, site, and any relevant detail such as laterality or episode of care. Every code in this table shares the same category characters, meaning they all describe variations of the same underlying diagnosis. The remaining characters distinguish specific manifestations, anatomical sites, or clinical circumstances within that category.

3 rows

ICD-10-CM Code	Description
A950	Sylvatic yellow fever
A951	Urban yellow fever
A959	Yellow fever, unspecified

DRG Codes

When a diagnosis from this group is reported on an inpatient claim, the CMS MS-DRG grouper evaluates the principal diagnosis, procedure codes, and the presence of complicating conditions (CC) or major complicating conditions (MCC) to assign a Diagnosis-Related Group. The DRGs listed above represent the possible MS-DRG assignments for diagnoses in this group. Each DRG carries a relative weight used to calculate the Medicare inpatient prospective payment.

DRG Codes	Description
DRG 865	Viral Illness with MCC
DRG 866	Viral Illness without MCC

Summary & Overview

Yellow fever: ICD-10-CM Diagnosis Code Group Overview

Yellow fever Overview

Typical Clinical Scenarios

ICD-10-CM Codes

DRG Codes

What diagnoses are represented in the `ICD-10-CM A95` group?

Why is accurate coding for `ICD-10-CM A95` important for billing and claims?

How does the presence of `ICD-10-CM A95` affect inpatient DRG assignment?

Which body systems are primarily involved with diagnoses in this group?

What clinical manifestations are noted for Yellow fever in the `ICD-10-CM A95` group?

ICD-10-CM Codes

DRG Codes