B99 ICD-10-CM Code: Other and unspecified infectious diseases
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
B99Other and unspecified infectious diseases
ICD-10-CM diagnosis code · United States clinical modification
Where B99 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Other infectious diseases (B99)
- 3
Category B99
Other and unspecified infectious diseases
- 4
Code B99
Other and unspecified infectious diseases
Codes under B99
B99 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for B99.
Code first
No “code first” instruction is listed for B99.
Use additional code
No “use additional code” instruction is listed for B99.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for B99.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for B99.
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 B99 mean?
B99 is the FY 2027 U.S. ICD-10-CM code for “Other and unspecified infectious diseases.”
Is B99 a billable or specific ICD-10-CM code?
No. B99 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is B99 located in ICD-10-CM?
B99 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Other infectious diseases (B99) (B99–B99), under category B99, Other and unspecified infectious diseases.
What coding notes are listed for B99?
No inclusion terms are listed for B99 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.