ICD-10-CM 2027
ICD-10 code for viral conjunctivitis nos
From the official ICD-10-CM alphabetic index entry “Conjunctivitis (staphylococcal) (streptococcal) NOS › viral”. Page updated September 29, 2026.
About coding viral conjunctivitis nos
The ICD-10-CM code for viral conjunctivitis nos is B30.9 (Viral conjunctivitis, unspecified). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B30.9.
Within B30, choose B30.9 (unspecified) only when documentation doesn't support a more specific option: keratoconjunctivitis due to adenovirus (B30.0), conjunctivitis due to adenovirus (B30.1), viral pharyngoconjunctivitis (B30.2), acute epidemic hemorrhagic conjunctivitis (enteroviral) (B30.3) and other viral conjunctivitis (B30.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific viral conjunctivitis nos codes (official index)
Common questions about viral conjunctivitis nos ICD-10 codes
What is the ICD-10 code for viral conjunctivitis nos?
- B30.9 — Viral conjunctivitis, unspecified. More specific codes apply when the documentation supports them: B30.1, B30.3, B30.8.
Is B30.9 billable?
- Yes. B30.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B30.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B30.9 as a principal diagnosis.
Is B30.9 a CC or MCC?
- No. B30.9 is neither a CC nor an MCC under MS-DRG v44.0.