All ICD10 Codes

H21

Non-Billable
ChapterH00–H59
Rankcategory
Official Description

Other disorders of iris and ciliary body

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 7: Diseases of the Eye and Adnexa (H00-H59).

CH7 Parent Instructions

Excludes2(Not included here)
  • 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)

Instructional Notes

Excludes2(Not included here)
  • sympathetic uveitis (H44.1-)

Clinical Hierarchy

CH7Diseases of the eye and adnexa (H00-H59)
H15-H22Disorders of sclera, cornea, iris and ciliary body (H15-H22)
H21Other disorders of iris and ciliary body
H21.0Hyphema
H21.1Other vascular disorders of iris and ciliary body
H21.2Degeneration of iris and ciliary body
H21.3Cyst of iris, ciliary body and anterior chamber
H21.4Pupillary membranes
H21.5Other and unspecified adhesions and disruptions of iris and ciliary body
H21.8Other specified disorders of iris and ciliary body
H21.9Unspecified disorder of iris and ciliary body

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to H21:

chapterCH7
Diseases of the eye and adnexa (H00-H59)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to H21. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Abnormal, abnormality, abnormalities1 unique routes
pupillary→H21
Adhesions, adhesive (postinfective)4 unique routes
iris→H21(4 variants)
anterior→H21
goniosynechiae→H21
posterior→H21
Atrophy, atrophic (of)2 unique routes
iris (essential) (progressive)→H21(2 variants)
specified NEC→H21
Cyst (colloid) (mucous) (simple) (retention)8 unique routes
iris→H21(7 variants)
exudative→H21
idiopathic→H21
implantation→H21
parasitic→H21
pars plana (primary)→H21(2 variants)
exudative→H21
pupillary, miotic→H21
Deformity1 unique routes
iris (acquired)→H21
Degeneration, degenerative4 unique routes
chamber angle→H21
ciliary body→H21
iris (pigmentary)→H21
pupillary margin→H21
Disease, diseased5 unique routes
anterior
chamber→H21
aqueous (chamber)→H21
ciliary body→H21(2 variants)
specified NEC→H21
eye
anterior chamber→H21

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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