2027 ICD-10-CM Diagnosis Code A92.5Zika virus disease

ICD-10-CM Codes›A00–B99›A90-A99›A92

ICD-10-CM A92.5
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A92.5 is a billable ICD-10-CM diagnosis code for Zika virus disease. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 865 through 866. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 186 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Viral infection.

Code Identity

ICD-10-CM Code
A92.5
Billable Status
Yes — Valid for Submission
Code Describes
Zika virus disease
Short Description
Zika virus disease
Same as the full description in the CMS dataset.
Parent Code
A92
Other mosquito-borne viral fevers

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA90-A99Arthropod-borne viral fevers and viral hemorrhagic fevers
CategoryA92Other mosquito-borne viral fevers
This CodeA92.5Zika virus disease

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Zika virus disease
  • Zika virus infection during pregnancy

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A92.5: its own notes plus those printed at A92 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Zika virus fever
  • Zika virus infection
  • Zika NOS

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On A92.5 itself
  • congenital Zika virus disease (P35.4)
From A92 Other mosquito-borne viral fevers applies to 11 codes
  • Ross River disease (B33.1)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF008
Viral infection
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Zika Virus Infection

    a viral disease transmitted by the bite of aedes mosquitoes infected with zika virus. its mild dengue-like symptoms include fever, rash, headaches and arthralgia. the viral infection during pregnancy, in rare cases, is associated with congenital brain and ocular abnormalities, called congenital zika syndrome, including microcephaly and may also lead to guillain-barre syndrome.

Patient EducationClinical

Zika Virus

Zika is a virus that is spread mostly by mosquitoes. A pregnant mother can pass it to her baby during pregnancy or around the time of birth. It can spread through sexual contact. There have also been reports that the virus has spread through blood transfusions.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert A92.5 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
066.3 Mosquito-borne fever NEC
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement A92.5 replaces the following previously assigned code(s):

  • A92.8 - Other specified mosquito-borne viral fevers
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A92.5Overview

What is the ICD-10 code for Zika virus disease?

The ICD-10-CM code for Zika virus disease is A92.5 (sometimes written as A925). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is A92.5 (Other mosquito-borne viral fevers) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Zika virus disease on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does A92.5 group to?

When Zika virus disease is the principal diagnosis on an inpatient stay, it groups to MS-DRG 866, 865, with relative weights from 0.8691 to 1.3153 depending on complications. Higher weights mean higher Medicare reimbursement.

Is A92.5 a CC or MCC?

CMS lists A92.5 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 186 closely related codes in its exclusion list.

Can A92.5 be reported with P35.4?

Not as a rule. The Excludes1 note on A92.5 lists "congenital Zika virus disease (P35.4)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).