Alphabetic Index FY2027

B30.1

Conjunctivitis due to adenovirus

FY2027Chapter 1: Certain infectious and parasitic diseases/B25–B34 Other viral diseases

BillableComplete code, valid to report
Care settingsHome Health Primary · MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases

B30.1 (also written B301) is a billable ICD-10-CM diagnosis code for conjunctivitis due to adenovirus. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 6 codes in category B30 (Viral conjunctivitis). The Alphabetic Index lists it under 4 entries. Its coding notes include a Use additional code instruction, 2 Excludes1 entries and 5 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

Also from chapter/block level (1 note)
Inherited from Chapter 1 Certain infectious and parasitic diseases
  • code to identify resistance to antimicrobial drugs (Z16.-)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from B30 Viral conjunctivitis
  • herpesviral [herpes simplex] ocular disease (B00.5)
  • ocular zoster (B02.3)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (5 notes)
Inherited from Chapter 1 Certain infectious and parasitic diseases
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Includes

Further defines or gives examples of the content of the category.

Also from chapter/block level (1 note)
Inherited from Chapter 1 Certain infectious and parasitic diseases
  • diseases generally recognized as communicable or transmissible

Inclusion terms

Conditions classified to this code.

This code
  • Acute adenoviral follicular conjunctivitis
  • Swimming-pool conjunctivitis

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 4 entries