ICD10BillableValid for clinical use
ICD-10 Code B30.9: Viral conjunctivitis, unspecified
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).
When is it used?
- May be used when a clinician documents viral conjunctivitis, unspecified in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
1Certain infectious and parasitic diseases (A00-B99)
block
B25-B34Other viral diseases
category
B30Viral conjunctivitis
currentB30
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
Infectious Disease SpecialistGeneral Physician
Related codes
Sibling codes
Coverage-related procedures and services
CPT 86790high
ANTIBODY; VIRUS, NOT ELSEWHERE SPECIFIED
Source: CMS coverage guidance
CPT 86794high
ANTIBODY; ZIKA VIRUS, IGM
Source: CMS coverage guidance
CPT 87801high
INFECTIOUS AGENT DETECTION BY NUCLEIC ACID (DNA OR RNA), MULTIPLE ORGANISMS; AMPLIFIED PROBE(S) TECHNIQUE
Source: CMS coverage guidance
CPT 87798high
INFECTIOUS AGENT DETECTION BY NUCLEIC ACID (DNA OR RNA), NOT OTHERWISE SPECIFIED; AMPLIFIED PROBE TECHNIQUE, EACH ORGANISM
Source: CMS coverage guidance
CPT 87662high
INFECTIOUS AGENT DETECTION BY NUCLEIC ACID (DNA OR RNA); ZIKA VIRUS, AMPLIFIED PROBE TECHNIQUE
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 239186001high
Acute epidemic conjunctivitis
Source: SNOMED International ICD-10 map
SNOMED_CT 15680481000119104high
Bilateral viral conjunctivitis
Source: SNOMED International ICD-10 map
SNOMED_CT 45261009high
Viral conjunctivitis
Source: SNOMED International ICD-10 map
SNOMED_CT 276682008high
Neonatal viral conjunctivitis
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
B30.9
Common synonyms
Viral conjunctivitis, unspecifiedViral conjunctivitis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.