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ICD-10-CM 2027

ICD-10 code for chemical acute conjunctivitis nos

H10.21

Acute toxic conjunctivitis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Conjunctivitis (staphylococcal) (streptococcal) NOS › chemical (acute)”. Page updated September 29, 2026.

About coding chemical acute conjunctivitis nos

The ICD-10-CM code for chemical acute conjunctivitis nos is H10.21 (Acute toxic conjunctivitis).

Within H10.2 (other acute conjunctivitis), H10.21 is specifically for acute toxic conjunctivitis. Related codes cover Pseudomembranous conjunctivitis (H10.22) and serous conjunctivitis, except viral (H10.23).

To report this condition, pick the subcode that matches the documentation: H10.211 (right eye), H10.212 (left eye), H10.213 (bilateral) and H10.219 (unspecified eye).

Don't report H10.21 together with the conditions in its Excludes1 note: burn and corrosion of eye and adnexa (T26.-).

Don't confuse with (Excludes1 for H10.21)

  • burn and corrosion of eye and adnexa (T26.-)

Common questions about chemical acute conjunctivitis nos ICD-10 codes

What is the ICD-10 code for chemical acute conjunctivitis nos?

H10.21 — Acute toxic conjunctivitis (a header code; report a more specific subcode).

Is H10.21 billable?

No. H10.21 is a header code. Report one of its more specific subcodes instead.