H20.0 Acute and subacute iridocyclitis

⚠ Non-Billable ICD-10-CM 2026
Open H20.0 in Web App →

The ICD-10-CM code for Acute and subacute iridocyclitis is H20.0 (FY2026). It is a non-billable category code — select a more specific code below for claims.

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

Also Known As

ICD-10-CM Alphabetic Index entries that lead to H20.0:

  • Iridocyclitis › acute
Excludes1
Not coded here. These conditions should NOT be coded 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)
  • 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

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

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

More Specific Codes

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 H20.042 Secondary noninfectious iridocyclitis, left eye H20.043 Secondary noninfectious iridocyclitis, bilateral H20.049 Secondary noninfectious iridocyclitis, unspecified eye H20.05 Hypopyon H20.051 Hypopyon, right eye H20.052 Hypopyon, left eye H20.053 Hypopyon, bilateral H20.059 Hypopyon, unspecified eye

Related Codes in H20

H20 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 H20.042 Secondary noninfectious iridocyclitis, left eye
Search all 70,000+ ICD-10-CM codes →
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

Get HCC Mappings, Clinical Summaries, and More

Access premium features including HCC risk adjustment, FDA drug indications, AI coding assistant, and comprehensive clinical context.

Start Free Trial