H20.12 Chronic iridocyclitis, left eye

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Chronic iridocyclitis, left eye is H20.12 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
H15-H22: Disorders of sclera, cornea, iris and ciliary body (H15-H22)
Category H20
50 codes (38 billable)
FY2026 Status
Stable since FY2024

U.S. Hospital Utilization

  • An estimated 150 U.S. inpatient stays in 2023 included H20.12 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Glaucoma (TOC entry)

a. Glaucoma .............................................................................................................................. 48

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.7.a
Assigning glaucoma codes (use as many H40 codes as needed)

Assign as many codes from category H40, Glaucoma, as needed to identify the type of glaucoma, the affected eye, and the glaucoma stage.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.7.a.1

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

H20 Iridocyclitis

Related Codes in H20

H20 Iridocyclitis H20.0 Acute and subacute iridocyclitis H20.00 Unspecified acute and subacute iridocyclitis H20.01 Primary iridocyclitis H20.011 Primary iridocyclitis, right eye H20.012 Primary iridocyclitis, left eye H20.013 Primary iridocyclitis, bilateral H20.019 Primary iridocyclitis, unspecified eye H20.02 Recurrent acute iridocyclitis H20.021 Recurrent acute iridocyclitis, right eye H20.022 Recurrent acute iridocyclitis, left eye H20.023 Recurrent acute iridocyclitis, bilateral H20.029 Recurrent acute iridocyclitis, unspecified eye H20.03 Secondary infectious iridocyclitis H20.031 Secondary infectious iridocyclitis, right eye H20.032 Secondary infectious iridocyclitis, left eye H20.033 Secondary infectious iridocyclitis, bilateral H20.039 Secondary infectious iridocyclitis, unspecified eye H20.04 Secondary noninfectious iridocyclitis H20.041 Secondary noninfectious iridocyclitis, right eye
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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