ICD10BillableValid for clinical use
ICD-10 Code H20.9: Unspecified iridocyclitis
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the eye and adnexa (H00-H59).
When is it used?
- May be used when a clinician documents unspecified iridocyclitis in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
7Diseases of the eye and adnexa (H00-H59)
block
H15-H22Disorders of sclera, cornea, iris and ciliary body
category
H20Iridocyclitis
currentH20
Official coding notes
Inclusion terms
- Uveitis NOS
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
Ophthalmologist
Related codes
Sibling codes
Coverage-related procedures and services
CPT 88182high
FLOW CYTOMETRY, CELL CYCLE OR DNA ANALYSIS
Source: CMS coverage guidance
CPT 88185high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; EACH ADDITIONAL MARKER (LIST SEPARATELY IN ADDITION TO CODE FOR FIRST MARKER)
Source: CMS coverage guidance
CPT 88184high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; FIRST MARKER
Source: CMS coverage guidance
CPT 88189high
FLOW CYTOMETRY, INTERPRETATION; 16 OR MORE MARKERS
Source: CMS coverage guidance
CPT 88187high
FLOW CYTOMETRY, INTERPRETATION; 2 TO 8 MARKERS
Source: CMS coverage guidance
CPT 88188high
FLOW CYTOMETRY, INTERPRETATION; 9 TO 15 MARKERS
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 410692006high
Anterior uveitis
Source: SNOMED International ICD-10 map
SNOMED_CT 630352961000119108high
Bilateral iritis due to and following surgical procedure on bilateral eye regions
Source: SNOMED International ICD-10 map
SNOMED_CT 344301000119109high
Bilateral primary iridocyclitis of eyes
Source: SNOMED International ICD-10 map
SNOMED_CT 15630851000119103high
Bilateral uveitis of eyes
Source: SNOMED International ICD-10 map
SNOMED_CT 413851004high
Cidofovir-induced anterior uveitis
Source: SNOMED International ICD-10 map
SNOMED_CT 17657000high
Cyclitis
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
H20.9
Common synonyms
Unspecified iridocyclitis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.