ICD-10 Code for Iridocyclitis

The default ICD-10-CM 2027 code for iridocyclitis is H20.9 – Unspecified iridocyclitis. More specific codes depend on the details documented, as listed in the official index (20 codes, 10 billable).

Main code: H20.9 – Unspecified iridocyclitis
Billable: Yes

Index entries for Iridocyclitis

acute – H20.0- (header)
- hypopyon – H20.05- (header)
- primary – H20.01- (header)
- recurrent – H20.02- (header)
- secondary (noninfectious) – H20.04- (header)
  - infectious – H20.03- (header)
chronic – H20.1- (header)
due to allergy – see Iridocyclitis, acute, secondary
endogenous – see Iridocyclitis, acute, primary
Fuchs' – see Cyclitis, Fuchs' heterochromic
gonococcal – A54.32
granulomatous – see Iridocyclitis, chronic
herpes, herpetic (simplex) – B00.51
- zoster – B02.32
hypopyon – see Iridocyclitis, acute, hypopyon
in (due to)
- ankylosing spondylitis – M45.9
- gonococcal infection – A54.32
- herpes (simplex) – B00.51
  - zoster – B02.32
- infectious disease NOS – B99 (header)
- parasitic disease NOS – B89 – H22 [manifestation]
- sarcoidosis – D86.83
- syphilis – A51.43
- tuberculosis – A18.54
- zoster – B02.32
lens-induced – H20.2- (header)
nongranulomatous – see Iridocyclitis, acute
recurrent – see Iridocyclitis, acute, recurrent
rheumatic – see Iridocyclitis, chronic
subacute – see Iridocyclitis, acute
sympathetic – see Uveitis, sympathetic
syphilitic (secondary) – A51.43
tuberculous (chronic) – A18.54
Vogt-Koyanagi – H20.82- (header)

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.