Is H21 a billable code?
No. H21 is a header code that groups 97 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
H21: Other disorders of iris and ciliary body
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
H21 groups related diagnoses under other disorders of iris and ciliary body. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under H21
- H21.00Hyphema, unspecified eye
- H21.01Hyphema, right eye
- H21.02Hyphema, left eye
- H21.03Hyphema, bilateral
- H21.1X1Other vascular disorders of iris and ciliary body, right eye
- H21.1X2Other vascular disorders of iris and ciliary body, left eye
- H21.1X3Other vascular disorders of iris and ciliary body, bilateral
- H21.1X9Other vascular disorders of iris and ciliary body, unspecified eye
- H21.211Degeneration of chamber angle, right eye
- H21.212Degeneration of chamber angle, left eye
- H21.213Degeneration of chamber angle, bilateral
- H21.219Degeneration of chamber angle, unspecified eye
- H21.221Degeneration of ciliary body, right eye
- H21.222Degeneration of ciliary body, left eye
- H21.223Degeneration of ciliary body, bilateral
- H21.229Degeneration of ciliary body, unspecified eye
- H21.231Degeneration of iris (pigmentary), right eye
- H21.232Degeneration of iris (pigmentary), left eye
- H21.233Degeneration of iris (pigmentary), bilateral
- H21.239Degeneration of iris (pigmentary), unspecified eye
- H21.241Degeneration of pupillary margin, right eye
- H21.242Degeneration of pupillary margin, left eye
- H21.243Degeneration of pupillary margin, bilateral
- H21.249Degeneration of pupillary margin, unspecified eye
- H21.251Iridoschisis, right eye
- H21.252Iridoschisis, left eye
- H21.253Iridoschisis, bilateral
- H21.259Iridoschisis, unspecified eye
- H21.261Iris atrophy (essential) (progressive), right eye
- H21.262Iris atrophy (essential) (progressive), left eye
- H21.263Iris atrophy (essential) (progressive), bilateral
- H21.269Iris atrophy (essential) (progressive), unspecified eye
- H21.271Miotic pupillary cyst, right eye
- H21.272Miotic pupillary cyst, left eye
- H21.273Miotic pupillary cyst, bilateral
- H21.279Miotic pupillary cyst, unspecified eye
- H21.29Other iris atrophy
- H21.301Idiopathic cysts of iris, ciliary body or anterior chamber, right eye
- H21.302Idiopathic cysts of iris, ciliary body or anterior chamber, left eye
- H21.303Idiopathic cysts of iris, ciliary body or anterior chamber, bilateral
- H21.309Idiopathic cysts of iris, ciliary body or anterior chamber, unspecified eye
- H21.311Exudative cysts of iris or anterior chamber, right eye
- H21.312Exudative cysts of iris or anterior chamber, left eye
- H21.313Exudative cysts of iris or anterior chamber, bilateral
- H21.319Exudative cysts of iris or anterior chamber, unspecified eye
- H21.321Implantation cysts of iris, ciliary body or anterior chamber, right eye
- H21.322Implantation cysts of iris, ciliary body or anterior chamber, left eye
- H21.323Implantation cysts of iris, ciliary body or anterior chamber, bilateral
- H21.329Implantation cysts of iris, ciliary body or anterior chamber, unspecified eye
- H21.331Parasitic cyst of iris, ciliary body or anterior chamber, right eye
- H21.332Parasitic cyst of iris, ciliary body or anterior chamber, left eye
- H21.333Parasitic cyst of iris, ciliary body or anterior chamber, bilateral
- H21.339Parasitic cyst of iris, ciliary body or anterior chamber, unspecified eye
- H21.341Primary cyst of pars plana, right eye
- H21.342Primary cyst of pars plana, left eye
- H21.343Primary cyst of pars plana, bilateral
- H21.349Primary cyst of pars plana, unspecified eye
- H21.351Exudative cyst of pars plana, right eye
- H21.352Exudative cyst of pars plana, left eye
- H21.353Exudative cyst of pars plana, bilateral
- H21.359Exudative cyst of pars plana, unspecified eye
- H21.40Pupillary membranes, unspecified eye
- H21.41Pupillary membranes, right eye
- H21.42Pupillary membranes, left eye
- H21.43Pupillary membranes, bilateral
- H21.501Unspecified adhesions of iris, right eye
- H21.502Unspecified adhesions of iris, left eye
- H21.503Unspecified adhesions of iris, bilateral
- H21.509Unspecified adhesions of iris and ciliary body, unspecified eye
- H21.511Anterior synechiae (iris), right eye
- H21.512Anterior synechiae (iris), left eye
- H21.513Anterior synechiae (iris), bilateral
- H21.519Anterior synechiae (iris), unspecified eye
- H21.521Goniosynechiae, right eye
- H21.522Goniosynechiae, left eye
- H21.523Goniosynechiae, bilateral
- H21.529Goniosynechiae, unspecified eye
- H21.531Iridodialysis, right eye
- H21.532Iridodialysis, left eye
- H21.533Iridodialysis, bilateral
- H21.539Iridodialysis, unspecified eye
- H21.541Posterior synechiae (iris), right eye
- H21.542Posterior synechiae (iris), left eye
- H21.543Posterior synechiae (iris), bilateral
- H21.549Posterior synechiae (iris), unspecified eye
- H21.551Recession of chamber angle, right eye
- H21.552Recession of chamber angle, left eye
- H21.553Recession of chamber angle, bilateral
- H21.559Recession of chamber angle, unspecified eye
- H21.561Pupillary abnormality, right eye
- H21.562Pupillary abnormality, left eye
- H21.563Pupillary abnormality, bilateral
- H21.569Pupillary abnormality, unspecified eye
- H21.81Floppy iris syndrome
- H21.82Plateau iris syndrome (post-iridectomy) (postprocedural)
- H21.89Other specified disorders of iris and ciliary body
- H21.9Unspecified disorder of iris and ciliary body
H21 questions
What does H21 mean?
H21 is the ICD-10-CM code for Other disorders of iris and ciliary body. It is in chapter 7, Diseases of the eye and adnexa (H00-H59).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.