ICD-10 Code for Iridocyclitis
The ICD-10-CM code for iridocyclitis is H20.9 — Unspecified iridocyclitis. This is the code the Alphabetic Index gives for iridocyclitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
H20.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which iridocyclitis code should you use?
The Alphabetic Index lists 20 codes under Iridocyclitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| acute | H20.0Not billable | Acute and subacute iridocyclitis |
| chronic | H20.1Not billable | Chronic iridocyclitis |
| gonococcal | A54.32 | Gonococcal iridocyclitis |
| herpes, herpetic | B00.51 | Herpesviral iridocyclitis |
| lens-induced | H20.2Not billable | Lens-induced iridocyclitis |
| syphilitic | A51.43 | Secondary syphilitic oculopathy |
| tuberculous | A18.54 | Tuberculous iridocyclitis |
| Vogt-Koyanagi | H20.82Not billable | Vogt-Koyanagi syndrome |
Iridocyclitis acute
Iridocyclitis herpes, herpetic
| zoster | B02.32 | Zoster iridocyclitis |
Iridocyclitis in
| ankylosing spondylitis | M45.9 | Ankylosing spondylitis of unspecified sites in spine |
| gonococcal infection | A54.32 | Gonococcal iridocyclitis |
| herpes virus | B00.51 | Herpesviral iridocyclitis |
| infectious disease NOS | B99Not billable | Other and unspecified infectious diseases |
| parasitic disease NOS | B89 | Unspecified parasitic disease |
| sarcoidosis | D86.83 | Sarcoid iridocyclitis |
| syphilis | A51.43 | Secondary syphilitic oculopathy |
| tuberculosis | A18.54 | Tuberculous iridocyclitis |
| zoster | B02.32 | Zoster iridocyclitis |
| herpes virus › zoster | B02.32 | Zoster iridocyclitis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources