ICD-10-CM Code A91

Dengue hemorrhagic fever

Version 2020 Billable Code

Valid for Submission

A91 is a billable code used to specify a medical diagnosis of dengue hemorrhagic fever. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code A91 might also be used to specify conditions or terms like dengue, dengue hemorrhagic fever, dengue hemorrhagic fever, grade i, dengue hemorrhagic fever, grade ii, dengue hemorrhagic fever, grade iii, dengue hemorrhagic fever, grade iv, etc

Short Description:Dengue hemorrhagic fever
Long Description:Dengue hemorrhagic fever

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code A91 are found in the index:


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

  • Dengue
  • Dengue hemorrhagic fever
  • Dengue hemorrhagic fever, grade I
  • Dengue hemorrhagic fever, grade II
  • Dengue hemorrhagic fever, grade III
  • Dengue hemorrhagic fever, grade IV
  • Dengue shock syndrome

Clinical Information

  • SEVERE DENGUE-. a virulent form of dengue characterized by thrombocytopenia and an increase in vascular permeability grades i and ii and distinguished by a positive pain test e.g. tourniquet pain test. when accompanied by shock grades iii and iv it is called dengue shock syndrome.

Diagnostic Related Groups

The ICD-10 code A91 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2020 through 09/30/2020.


Convert A91 to ICD-9

  • 065.4 - Mosquito-borne hem fever (Approximate Flag)

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99)
      • Dengue hemorrhagic fever (A91)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Dengue is an infection caused by a virus. You can get it if an infected mosquito bites you. Dengue does not spread from person to person. It is common in warm, wet areas of the world. Outbreaks occur in the rainy season. Dengue is rare in the United States.

Symptoms include a high fever, headaches, joint and muscle pain, vomiting, and a rash. In some cases, dengue turns into dengue hemorrhagic fever, which causes bleeding from your nose, gums, or under your skin. It can also become dengue shock syndrome, which causes massive bleeding and shock. These forms of dengue are life-threatening.

There is no specific treatment. Most people with dengue recover within 2 weeks. Until then, drinking lots of fluids, resting and taking non-aspirin fever-reducing medicines might help. People with the more severe forms of dengue usually need to go to the hospital and get fluids.

To lower your risk when traveling to areas where dengue is found

  • Wear insect repellent with DEET
  • Wear clothes that cover your arms, legs and feet
  • Close unscreened doors and windows

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