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 | H20.0 | Acute and subacute iridocyclitis | not billable |
| chronic | H20.1 | Chronic iridocyclitis | not billable |
| gonococcal | A54.32 | Gonococcal iridocyclitis | |
| herpes, herpetic | B00.51 | Herpesviral iridocyclitis | |
| lens-induced | H20.2 | Lens-induced iridocyclitis | not billable |
| syphilitic | A51.43 | Secondary syphilitic oculopathy | |
| tuberculous | A18.54 | Tuberculous iridocyclitis | |
| Vogt-Koyanagi | H20.82 | Vogt-Koyanagi syndrome | not billable |
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 | |
| herpesvirus | B00.51 | Herpesviral iridocyclitis | |
| infectious disease NOS | B99 | Other and unspecified infectious diseases | not billable |
| 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 | |
| herpesvirus › 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