B33 ICD-10-CM Code: Other viral diseases, not elsewhere classified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
B33Other viral diseases, not elsewhere classified
ICD-10-CM diagnosis code · United States clinical modification
Where B33 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Other viral diseases (B25-B34)
- 3
Category B33
Other viral diseases, not elsewhere classified
- 4
Code B33
Other viral diseases, not elsewhere classified
Codes under B33
B33 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 B33.
Code first
No “code first” instruction is listed for B33.
Use additional code
No “use additional code” instruction is listed for B33.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for B33.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for B33.
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 B33 mean?
B33 is the FY 2027 U.S. ICD-10-CM code for “Other viral diseases, not elsewhere classified.”
Is B33 a billable or specific ICD-10-CM code?
No. B33 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 B33 located in ICD-10-CM?
B33 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Other viral diseases (B25-B34) (B25–B34), under category B33, Other viral diseases, not elsewhere classified.
What coding notes are listed for B33?
No inclusion terms are listed for B33 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.