ICD-10-CM 2027
ICD-10 code for acute conjunctivitis nos
From the official ICD-10-CM alphabetic index entry “Conjunctivitis (staphylococcal) (streptococcal) NOS › acute”. Page updated September 29, 2026.
About coding acute conjunctivitis nos
The ICD-10-CM code for acute conjunctivitis nos is H10.3 (Unspecified acute conjunctivitis). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H10.3.
Within H10, choose H10.3 (Unspecified acute conjunctivitis) only when documentation doesn't support a more specific option: mucopurulent conjunctivitis (H10.0), acute atopic conjunctivitis (H10.1), other acute conjunctivitis (H10.2), chronic conjunctivitis (H10.4), blepharoconjunctivitis (H10.5), other conjunctivitis (H10.8) and unspecified conjunctivitis (H10.9).
To report this condition, pick the subcode that matches the documentation: H10.30 (unspecified eye), H10.31 (right eye), H10.32 (left eye) and H10.33 (bilateral).
Don't report H10.3 together with the conditions in its Excludes1 note: ophthalmia neonatorum NOS (P39.1).
More specific acute conjunctivitis nos codes (official index)
- atopic H10.1 — Acute atopic conjunctivitis
- mucopurulent H10.02 — Other mucopurulent conjunctivitis
- follicular H10.01 — Acute follicular conjunctivitis
- chemical H10.21 — Acute toxic conjunctivitis
- pseudomembranous H10.22 — Pseudomembranous conjunctivitis
- serous except viral H10.23 — Serous conjunctivitis, except viral
- viral
- toxic H10.21 — Acute toxic conjunctivitis
Don't confuse with (Excludes1 for H10.3)
- ophthalmia neonatorum NOS (P39.1)
Common questions about acute conjunctivitis nos ICD-10 codes
What is the ICD-10 code for acute conjunctivitis nos?
- H10.3 — Unspecified acute conjunctivitis (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H10.1, H10.02, H10.01, H10.21 and others below.
What is the ICD-10 code for atopic acute conjunctivitis nos?
- H10.1 — Acute atopic conjunctivitis (header code; choose a more specific subcode).
What is the ICD-10 code for mucopurulent acute conjunctivitis nos?
- H10.02 — Other mucopurulent conjunctivitis (header code; choose a more specific subcode).
What is the ICD-10 code for chemical acute conjunctivitis nos?
- H10.21 — Acute toxic conjunctivitis (header code; choose a more specific subcode).
What is the ICD-10 code for pseudomembranous acute conjunctivitis nos?
- H10.22 — Pseudomembranous conjunctivitis (header code; choose a more specific subcode).
What is the ICD-10 code for serous except viral acute conjunctivitis nos?
- H10.23 — Serous conjunctivitis, except viral (header code; choose a more specific subcode).
What is the ICD-10 code for toxic acute conjunctivitis nos?
- H10.21 — Acute toxic conjunctivitis (header code; choose a more specific subcode).
Is H10.3 billable?
- No. H10.3 is a header code. Report one of its more specific subcodes instead.