H20.0 — Acute and subacute iridocyclitis
Is H20.0 billable?
No — H20.0 is a non-billable header code. H20.0 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 21 billable codes beneath H20.0.
Billable codes under this header
- H20.00Unspecified acute and subacute iridocyclitis
- H20.011Primary iridocyclitis, right eye
- H20.012Primary iridocyclitis, left eye
- H20.013Primary iridocyclitis, bilateral
- H20.019Primary iridocyclitis, unspecified eye
- H20.021Recurrent acute iridocyclitis, right eye
- H20.022Recurrent acute iridocyclitis, left eye
- H20.023Recurrent acute iridocyclitis, bilateral
- H20.029Recurrent acute iridocyclitis, unspecified eye
- H20.031Secondary infectious iridocyclitis, right eye
- H20.032Secondary infectious iridocyclitis, left eye
- H20.033Secondary infectious iridocyclitis, bilateral
- H20.039Secondary infectious iridocyclitis, unspecified eye
- H20.041Secondary noninfectious iridocyclitis, right eye
- H20.042Secondary noninfectious iridocyclitis, left eye
- H20.043Secondary noninfectious iridocyclitis, bilateral
- H20.049Secondary noninfectious iridocyclitis, unspecified eye
- H20.051Hypopyon, right eye
- H20.052Hypopyon, left eye
- H20.053Hypopyon, bilateral
- H20.059Hypopyon, unspecified eye
H20.0 at a glance
| Code | H20.0 |
|---|---|
| Description | Acute and subacute iridocyclitis |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is H20.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to H20.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Iridocyclitis › acute
Excludes1 — never code together
The conditions below can never be reported together with H20.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- 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)
Inclusion terms
Alternative wording in documentation that is classified to H20.0.
- Acute anterior uveitis
- Acute cyclitis
- Acute iritis
- Subacute anterior uveitis
- Subacute cyclitis
- Subacute iritis
Excludes2 — not included here — inherited from Chapter 7
The conditions below are not part of H20.0, but a patient may have both at the same time. When documentation supports it, H20.0 and the excluded code may both be reported.
- 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)
What codes fall under H20.0? (6)
How long has H20.0 existed?
H20.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with H20.0?
ICD-10-CM declares these codes mutually exclusive with H20.0 — exactly one of each pair can be correct for a given encounter.