H20.0

ICD-10Non-billable category

Acute and subacute iridocyclitis

Official ICD-10-CM descriptor (FY2026)

Acute and subacute iridocyclitis

H20.0 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Inclusion terms

Acute anterior uveitis
Acute cyclitis
Acute iritis
Subacute anterior uveitis
Subacute cyclitis
Subacute iritis

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

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)

ICD-10-CM FY2026 defines 6 codes beneath H20.0. See the ICD-10-CM index for what this site publishes.

Related codes in H20

Where this code sits

Chapter: 7. Diseases of the eye and adnexa (H00-H59)
Block: Disorders of sclera, cornea, iris and ciliary body (H15-H22)
Parent code: H20

Krasyn AI Coder

Get code suggestions automatically as you type notes. Free for 50 analyses.

Install for Chrome — free

Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.