2022 ICD-10-CM Code H20.0

Acute and subacute iridocyclitis

Version 2021

Not Valid for Submission

ICD-10:H20.0
Short Description:Acute and subacute iridocyclitis
Long Description:Acute and subacute iridocyclitis

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 2022 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 for 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 codes with a higher level of specificity when coding for acute and subacute iridocyclitis:

  • BILLABLE CODE - Use H20.00 for Unspecified acute and subacute iridocyclitis
  • NON-BILLABLE CODE - H20.01 for Primary iridocyclitis
  • 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
  • NON-BILLABLE CODE - H20.02 for Recurrent acute iridocyclitis
  • 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
  • NON-BILLABLE CODE - H20.03 for Secondary infectious iridocyclitis
  • 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
  • NON-BILLABLE CODE - H20.04 for Secondary noninfectious iridocyclitis
  • 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
  • NON-BILLABLE CODE - H20.05 for Hypopyon
  • 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

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code H20.0:


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.

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.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code H20.0 are found in the index:

Information for Patients


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

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 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 (First year ICD-10-CM implemented into the HIPAA code set)