H10.21
Acute toxic conjunctivitis
H10.21 is a non-billable ICD-10-CM code header for acute toxic conjunctivitis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are H10.211 Acute toxic conjunctivitis, right eye; H10.212 Acute toxic conjunctivitis, left eye; H10.213 Acute toxic conjunctivitis, bilateral and H10.219 Acute toxic conjunctivitis, unspecified eye. Its coding notes include a Code first instruction, 2 Excludes1 entries and 11 Excludes2 entries.
Code first
If the underlying condition listed here is present and known, sequence it first.
- (T51-T65) to identify chemical and intent
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- burn and corrosion of eye and adnexa (T26.-)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (11 notes)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury (trauma) of eye and orbit (S05.-)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
Inclusion terms
Conditions classified to this code.
- Acute chemical conjunctivitis
Notes
Also from chapter/block level (1 note)
- Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 3 entries