ICD-10 H20.0
Non-Billable HeaderAcute and subacute iridocyclitis
About ICD-10-CM H20.0
ICD-10-CM code H20.0 represents Acute and subacute iridocyclitis. This is a non-billable header code in the Eye and Adnexa chapter (block H20). The 2026 edition of ICD-10-CM H20.0 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under H20.0. Per CMS ICD-10-CM Tabular 2026.
- Acute anterior uveitis
- Acute cyclitis
- Acute iritis
- Subacute anterior uveitis
- Subacute cyclitis
- Subacute iritis
Type 1 Excludes
Pure excludes, these codes can never be coded together with H20.0. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- 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)
Medicare LCD Coverage for H20.0
Local Coverage Determinations (LCDs) from CMS MACs that list H20.0 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing H20.0.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but H20.0 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with H20.0
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To H20.0
Other codes in section H15-H22 (Disorders of sclera, cornea, iris and ciliary body).
ICD-10 H20.0, Billing FAQ
Is ICD-10 code H20.0 billable? +
No, H20.0 is a non-billable header code. Use a more specific child code from block H20 when submitting claims.
What other names or terms map to H20.0? +
ICD-10 H20.0 includes: Acute anterior uveitis; Acute cyclitis; Acute iritis, and 3 more clinical synonyms.
What codes are Type 1 Excludes for H20.0? +
Type 1 Excludes (never code together with H20.0): 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)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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