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  6. 2026 ICD-10-CM Code H21

2026 ICD-10-CM Diagnosis Code H21

Other disorders of iris and ciliary body

ICD-10-CM Code:
H21
ICD-10 Code for:
Other disorders of iris and ciliary body
Is Billable?
Not Valid for Submission
Code Navigator:

H21 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other disorders of iris and ciliary body. The code is not specific and is NOT valid for the year 2026 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 Other disorders of iris and ciliary body

Non-specific codes like H21 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 other disorders of iris and ciliary body:

  • H21.0 for Hyphema - NON-BILLABLE CODE

  • Use H21.00 for Hyphema, unspecified eye - BILLABLE CODE

  • Use H21.01 for Hyphema, right eye - BILLABLE CODE

  • Use H21.02 for Hyphema, left eye - BILLABLE CODE

  • Use H21.03 for Hyphema, bilateral - BILLABLE CODE

  • H21.1 for Other vascular disorders of iris and ciliary body - NON-BILLABLE CODE

  • H21.1X for Other vascular disorders of iris and ciliary body - NON-BILLABLE CODE

  • H21.2 for Degeneration of iris and ciliary body - NON-BILLABLE CODE

  • H21.21 for Degeneration of chamber angle - NON-BILLABLE CODE

  • H21.22 for Degeneration of ciliary body - NON-BILLABLE CODE

  • H21.23 for Degeneration of iris (pigmentary) - NON-BILLABLE CODE

  • H21.24 for Degeneration of pupillary margin - NON-BILLABLE CODE

  • H21.25 for Iridoschisis - NON-BILLABLE CODE

  • H21.26 for Iris atrophy (essential) (progressive) - NON-BILLABLE CODE

  • H21.27 for Miotic pupillary cyst - NON-BILLABLE CODE

  • Use H21.29 for Other iris atrophy - BILLABLE CODE

  • H21.3 for Cyst of iris, ciliary body and anterior chamber - NON-BILLABLE CODE

  • H21.30 for Idiopathic cysts of iris, ciliary body or anterior chamber - NON-BILLABLE CODE

  • H21.31 for Exudative cysts of iris or anterior chamber - NON-BILLABLE CODE

  • H21.32 for Implantation cysts of iris, ciliary body or anterior chamber - NON-BILLABLE CODE

  • H21.33 for Parasitic cyst of iris, ciliary body or anterior chamber - NON-BILLABLE CODE

  • H21.34 for Primary cyst of pars plana - NON-BILLABLE CODE

  • H21.35 for Exudative cyst of pars plana - NON-BILLABLE CODE

  • H21.4 for Pupillary membranes - NON-BILLABLE CODE

  • Use H21.40 for Pupillary membranes, unspecified eye - BILLABLE CODE

  • Use H21.41 for Pupillary membranes, right eye - BILLABLE CODE

  • Use H21.42 for Pupillary membranes, left eye - BILLABLE CODE

  • Use H21.43 for Pupillary membranes, bilateral - BILLABLE CODE

  • H21.5 for Other and unspecified adhesions and disruptions of iris and ciliary body - NON-BILLABLE CODE

  • H21.50 for Unspecified adhesions of iris - NON-BILLABLE CODE

  • H21.51 for Anterior synechiae (iris) - NON-BILLABLE CODE

  • H21.52 for Goniosynechiae - NON-BILLABLE CODE

  • H21.53 for Iridodialysis - NON-BILLABLE CODE

  • H21.54 for Posterior synechiae (iris) - NON-BILLABLE CODE

  • H21.55 for Recession of chamber angle - NON-BILLABLE CODE

  • H21.56 for Pupillary abnormalities - NON-BILLABLE CODE

  • H21.8 for Other specified disorders of iris and ciliary body - NON-BILLABLE CODE

  • Use H21.81 for Floppy iris syndrome - BILLABLE CODE

  • Use H21.82 for Plateau iris syndrome (post-iridectomy) (postprocedural) - BILLABLE CODE

  • Use H21.89 for Other specified disorders of iris and ciliary body - BILLABLE CODE

  • Use H21.9 for Unspecified disorder of iris and ciliary body - BILLABLE CODE

Code Classification

  • Diseases of the eye and adnexa
    H00–H59
    • Disorders of sclera, cornea, iris and ciliary body
      H15-H22
      • Other disorders of iris and ciliary body
        H21

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.


Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • sympathetic uveitis H44.1

Patient Education


Eye Diseases

What diseases can affect the eye?

Even if your eyes feel healthy, you could have a problem and not know it. That's why regular eye exams are so important. Refractive errors are the most common type of vision problem that makes it hard to see clearly. But some eye conditions or diseases don't have any symptoms and can lead to a permanent loss of vision.

Some common eye diseases and conditions include:

  • Cataracts, which happens when the clear lens in the front of your eye becomes cloudy. Cataracts are common as you get older and can lead to vision loss.
  • Optic nerve disorders, which includes glaucoma. Glaucoma usually happens when the fluid pressure inside your eyes slowly rises.
  • Retinal disorders, which are problems with the nerve layer at the back of your eye.
  • Macular degeneration, which is a disease that destroys your sharp, central vision.
  • Diabetic eye problems, which can cause vision loss and blindness.
  • Conjunctivitis, which is an infection also known as pink eye. It can cause pink or red itchy eyes. Some types of pink eye can spread very easily.

What are the symptoms of eye diseases?

Some eye conditions and diseases do not always have symptoms. Early detection through a comprehensive dilated eye exam could help your eye care provider detect diseases in the early stages. Proper treatment could help slow or prevent vision loss.

Get regular eye exams and call your eye care professional right away if you notice any of these symptoms:

  • A sudden change in vision
  • Everything looks dim
  • Flashes of light
  • Eye pain
  • Double vision
  • Fluid coming from your eye
  • Inflammation (swelling)

Who is more likely to develop eye diseases?

Getting older increases your risk of some eye diseases. Other things that may put you at a higher risk of some eye diseases can include if you:

  • Are overweight or obese
  • Have a family history of eye disease
  • Are African American, Hispanic, or Native American
  • Have certain health conditions such as Diabetic eye problems, or high blood pressure

What are the treatments for eye diseases?

Treatment may depend on the eye condition or disease but can include:

  • A new prescription for eyeglasses or contacts
  • Use of bright lights or magnifying lenses for reading and other activities
  • Medicines
  • Prescription eye drops or ointments
  • Laser treatment
  • Surgery

Depending on your eye condition or disease, treatment may slow vision loss but may not restore vision. Talk to your provider about what treatment is best for you.

Can eye diseases be prevented?

Your best defense is to have regular checkups. Be sure to tell your provider if any eye diseases run in your family.

You can also help take care of your vision by making lifestyle changes to lower your risk of health conditions that can cause vision problems. This could include by:

  • Protecting your eyes from the sun
  • Wearing protective eyewear while using tools or playing certain sports
  • Getting regular physical activity
  • Staying at a healthy weight
  • Quitting smoking (or not starting)
  • Eating a healthy diet

NIH: National Eye Institute


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • 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.