H20.0
Acute and subacute iridocyclitis
H20.0 is a non-billable ICD-10-CM code header for acute and subacute iridocyclitis. 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 H20.00 Unspecified acute and subacute iridocyclitis, H20.01 Primary iridocyclitis, H20.02 Recurrent acute iridocyclitis, H20.03 Secondary infectious iridocyclitis and 2 more. Its coding notes include 11 Excludes1 entries and 11 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- iridocyclitis, iritis, uveitis (due to) (in) diabetes mellitus (E08-E13 with .39)
- iridocyclitis, iritis, uveitis (due to) (in) diphtheria (A36.89)
- iridocyclitis, iritis, uveitis (due to) (in) gonococcal (A54.32)
- iridocyclitis, iritis, uveitis (due to) (in) herpes (simplex) (B00.51)
- iridocyclitis, iritis, uveitis (due to) (in) herpes zoster (B02.32)
- iridocyclitis, iritis, uveitis (due to) (in) late congenital syphilis (A50.39)
- iridocyclitis, iritis, uveitis (due to) (in) late syphilis (A52.71)
- iridocyclitis, iritis, uveitis (due to) (in) sarcoidosis (D86.83)
- iridocyclitis, iritis, uveitis (due to) (in) syphilis (A51.43)
- iridocyclitis, iritis, uveitis (due to) (in) toxoplasmosis (B58.09)
- iridocyclitis, iritis, uveitis (due to) (in) tuberculosis (A18.54)
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 anterior uveitis
- Acute cyclitis
- Acute iritis
- Subacute anterior uveitis
- Subacute cyclitis
- Subacute iritis
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. 1 entry