2027 ICD-10-CM Diagnosis Code H21Other disorders of iris and ciliary body

ICD-10-CM Codes›H00–H59›H15-H22›H21

ICD-10-CM H21
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H21 is a non-billable ICD-10-CM category code for other disorders of iris and ciliary body, so it cannot be submitted on claims. Use a more specific code from this category instead, such as H21.00, H21.01, H21.02, and H21.03.

Code Identity

ICD-10-CM Code
H21
Billable Status
No — Non-Billable Category
Code Describes
Other disorders of iris and ciliary body
Short Description
Other disorders of iris and ciliary body
Same as the full description in the CMS dataset.
Chapter
H15-H22
Disorders of sclera, cornea, iris and ciliary body

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH21Other disorders of iris and ciliary body
This CodeH21Other disorders of iris and ciliary body

Specific Coding for Other disorders of iris and ciliary bodyOverview

Non-specific codes like H21 require more characters. Use one of these billable codes instead:

  • H21.0 for Hyphema

  • Use H21.00 for Hyphema, unspecified eye

  • Use H21.01 for Hyphema, right eye

  • Use H21.02 for Hyphema, left eye

  • Use H21.03 for Hyphema, bilateral

  • H21.1 for Other vascular disorders of iris and ciliary body

  • H21.1X for Other vascular disorders of iris and ciliary body

  • H21.2 for Degeneration of iris and ciliary body

  • H21.21 for Degeneration of chamber angle

  • H21.22 for Degeneration of ciliary body

  • H21.23 for Degeneration of iris (pigmentary)

  • H21.24 for Degeneration of pupillary margin

  • H21.25 for Iridoschisis

  • H21.26 for Iris atrophy (essential) (progressive)

  • H21.27 for Miotic pupillary cyst

  • Use H21.29 for Other iris atrophy

  • H21.3 for Cyst of iris, ciliary body and anterior chamber

  • H21.30 for Idiopathic cysts of iris, ciliary body or anterior chamber

  • H21.31 for Exudative cysts of iris or anterior chamber

  • H21.32 for Implantation cysts of iris, ciliary body or anterior chamber

  • H21.33 for Parasitic cyst of iris, ciliary body or anterior chamber

  • H21.34 for Primary cyst of pars plana

  • H21.35 for Exudative cyst of pars plana

  • H21.4 for Pupillary membranes

  • Use H21.40 for Pupillary membranes, unspecified eye

  • Use H21.41 for Pupillary membranes, right eye

  • Use H21.42 for Pupillary membranes, left eye

  • Use H21.43 for Pupillary membranes, bilateral

  • H21.5 for Other and unspecified adhesions and disruptions of iris and ciliary body

  • H21.50 for Unspecified adhesions of iris

  • H21.51 for Anterior synechiae (iris)

  • H21.52 for Goniosynechiae

  • H21.53 for Iridodialysis

  • H21.54 for Posterior synechiae (iris)

  • H21.55 for Recession of chamber angle

  • H21.56 for Pupillary abnormalities

  • H21.8 for Other specified disorders of iris and ciliary body

  • Use H21.81 for Floppy iris syndrome

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

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

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H21: its own notes plus those printed at Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On H21 itself
From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H21Overview

What is the ICD-10 code for other disorders of iris and ciliary body?

H21 is the ICD-10-CM category for other disorders of iris and ciliary body, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is H21 (Other disorders of iris and ciliary body) a billable code?

No. This is a category header that groups the codes for other disorders of iris and ciliary body, and headers cannot be submitted on claims. Claims for other disorders of iris and ciliary body need a more specific code from this category, such as H21.00, H21.01, and H21.02.