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  6. 2024 ICD-10-CM Code H20.0
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code H20.0

Acute and subacute iridocyclitis

ICD-10-CM Code:
H20.0
ICD-10 Code for:
Acute and subacute iridocyclitis
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the eye and adnexa
    (H00–H59)
    • Disorders of sclera, cornea, iris and ciliary body
      (H15-H22)
      • Iridocyclitis
        (H20)

H20.0 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of acute and subacute iridocyclitis. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Acute and subacute iridocyclitis

Non-specific codes like H20.0 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for acute and subacute iridocyclitis:

  • Use H20.00 for Unspecified acute and subacute iridocyclitis - BILLABLE CODE

  • H20.01 for Primary iridocyclitis - NON-BILLABLE CODE

  • Use H20.011 for Primary iridocyclitis, right eye - BILLABLE CODE

  • Use H20.012 for Primary iridocyclitis, left eye - BILLABLE CODE

  • Use H20.013 for Primary iridocyclitis, bilateral - BILLABLE CODE

  • Use H20.019 for Primary iridocyclitis, unspecified eye - BILLABLE CODE

  • H20.02 for Recurrent acute iridocyclitis - NON-BILLABLE CODE

  • Use H20.021 for Recurrent acute iridocyclitis, right eye - BILLABLE CODE

  • Use H20.022 for Recurrent acute iridocyclitis, left eye - BILLABLE CODE

  • Use H20.023 for Recurrent acute iridocyclitis, bilateral - BILLABLE CODE

  • Use H20.029 for Recurrent acute iridocyclitis, unspecified eye - BILLABLE CODE

  • H20.03 for Secondary infectious iridocyclitis - NON-BILLABLE CODE

  • Use H20.031 for Secondary infectious iridocyclitis, right eye - BILLABLE CODE

  • Use H20.032 for Secondary infectious iridocyclitis, left eye - BILLABLE CODE

  • Use H20.033 for Secondary infectious iridocyclitis, bilateral - BILLABLE CODE

  • Use H20.039 for Secondary infectious iridocyclitis, unspecified eye - BILLABLE CODE

  • H20.04 for Secondary noninfectious iridocyclitis - NON-BILLABLE CODE

  • Use H20.041 for Secondary noninfectious iridocyclitis, right eye - BILLABLE CODE

  • Use H20.042 for Secondary noninfectious iridocyclitis, left eye - BILLABLE CODE

  • Use H20.043 for Secondary noninfectious iridocyclitis, bilateral - BILLABLE CODE

  • Use H20.049 for Secondary noninfectious iridocyclitis, unspecified eye - BILLABLE CODE

  • H20.05 for Hypopyon - NON-BILLABLE CODE

  • Use H20.051 for Hypopyon, right eye - BILLABLE CODE

  • Use H20.052 for Hypopyon, left eye - BILLABLE CODE

  • Use H20.053 for Hypopyon, bilateral - BILLABLE CODE

  • Use H20.059 for Hypopyon, unspecified eye - BILLABLE CODE

Clinical Information

  • Iridocyclitis

    acute or chronic inflammation of the iris and ciliary body characterized by exudates into the anterior chamber, discoloration of the iris, and constricted, sluggish pupil. symptoms include radiating pain, photophobia, lacrimation, and interference with vision.

  • Chronic Iridocyclitis|Chronic Uveitis

    uveitis that is usually insidious in onset, bilateral, and can be asymptomatic, most often affecting the anterior uveal tract, including the iris and ciliary body, and can result in long-term complications. it is most commonly associated with certain forms of juvenile idiopathic arthritis, but may occur independent of arthritis.

  • Iridocyclitis

    inflammation of the iris and the ciliary body.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Acute anterior uveitis
  • Acute cyclitis
  • Acute iritis
  • Subacute anterior uveitis
  • Subacute cyclitis
  • Subacute iritis

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • iridocyclitis, iritis, uveitis due to in diabetes mellitus E08 E13
  • 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

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Patient Education


Eye Diseases

Some eye problems are minor and don't last long. But some can lead to a permanent loss of vision.

Common eye problems include:

  • Refractive errors
  • Cataracts - clouded lenses
  • Optic nerve disorders, including glaucoma
  • Retinal disorders - problems with the nerve layer at the back of the eye
  • Macular degeneration - a disease that destroys sharp, central vision
  • Diabetic eye problems
  • Conjunctivitis - an infection also known as pink eye

Your best defense is to have regular checkups, because eye diseases do not always have symptoms. Early detection and treatment could prevent vision loss. See an eye care professional right away if you have a sudden change in vision, if everything looks dim, or if you see flashes of light. Other symptoms that need quick attention are pain, double vision, fluid coming from the eye, and inflammation.

NIH: National Eye Institute


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.