What does ICD-10 code A91 mean?

ICD-10 code A91 is the standardized code used for dengue hemorrhagic fever in medical records and coding systems.

When is ICD-10 code A91 used?

Doctors, hospitals, and insurers may use ICD-10 code A91 when recording dengue hemorrhagic fever in a standardized format.

Does ICD-10 code A91 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10BillableValid for clinical use

ICD-10 Code A91: Dengue hemorrhagic fever

Name: ICD-10 Code A91: Dengue hemorrhagic fever
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:00:55.627Z

A91 is a billable ICD-10 diagnosis code used to classify Dengue hemorrhagic fever in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

When is it used?

May be used when a clinician documents dengue hemorrhagic fever in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter

1Certain infectious and parasitic diseases (A00-B99)

block

A90-A99Arthropod-borne viral fevers and viral hemorrhagic fevers

currentA90-A99

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Infectious Disease SpecialistGeneral Physician

Sibling codes

A90Dengue fever [classical dengue]billable A92Other mosquito-borne viral fevers A93Other arthropod-borne viral fevers, not elsewhere classified A94Unspecified arthropod-borne viral feverbillable A95Yellow fever A96Arenaviral hemorrhagic fever A98Other viral hemorrhagic fevers, not elsewhere classified A99Unspecified viral hemorrhagic feverbillable

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.

Legacy codes

A91

Common synonyms

Dengue hemorrhagic fever

Frequently asked questions

Code details

CodeA91

SystemICD10

Display nameDengue hemorrhagic fever

ChapterCertain infectious and parasitic diseases (A00-B99)

BlockArthropod-borne viral fevers and viral hemorrhagic fevers

Flags

BillableYes

Valid clinical useYes

Source

SourceICD-10

Version2026-annual

Releaseannual

Year2026

Index terms

Matched terms

Bangkok hemorrhagic feverDengue(classical) (fever)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.