A99 ICD-10-CM Code: Unspecified viral hemorrhagic fever
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
A99Unspecified viral hemorrhagic fever
ICD-10-CM diagnosis code · United States clinical modification
Where A99 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99)
- 3
Category A99
Unspecified viral hemorrhagic fever
- 4
Code A99
Unspecified viral hemorrhagic fever
Notes for this code
Inclusion terms
No inclusion terms are listed for A99.
Code first
No “code first” instruction is listed for A99.
Use additional code
No “use additional code” instruction is listed for A99.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for A99.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for A99.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code A99 mean?
A99 is the FY 2027 U.S. ICD-10-CM code for “Unspecified viral hemorrhagic fever.”
Is A99 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, A99 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is A99 located in ICD-10-CM?
A99 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99) (A90–A99), under category A99, Unspecified viral hemorrhagic fever.
What coding notes are listed for A99?
No inclusion terms are listed for A99 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.