2027 ICD-10-CM Diagnosis Code H20.21Lens-induced iridocyclitis, right eye

ICD-10-CM Codes›H00–H59›H15-H22›H20

ICD-10-CM H20.21
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H20.21 is a billable ICD-10-CM diagnosis code for lens-induced iridocyclitis, right eye. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Uveitis and ocular inflammation.

Code Identity

ICD-10-CM Code
H20.21
Billable Status
Yes — Valid for Submission
Code Describes
Lens-induced iridocyclitis, right eye
Short Description
Lens-induced iridocyclitis, right eye
Same as the full description in the CMS dataset.
Parent Code
H20.2
Lens-induced iridocyclitis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH20Iridocyclitis
This CodeH20.21Lens-induced iridocyclitis, right eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Glaucoma of right eye with intraocular hemorrhage
  • Glaucoma with intraocular hemorrhage
  • Hemorrhage associated with implant
  • Hyphema of right eye
  • Intraocular lens associated postoperative inflammation
  • Lens-induced uveitis
  • Phacoantigenic uveitis
  • Postoperative uveitis
  • Right phacoantigenic uveitis
  • Secondary open angle glaucoma due to ocular surgery
  • Secondary open angle glaucoma of right eye due to ocular surgery
  • Uveitis-glaucoma-hyphema syndrome
  • Uveitis-glaucoma-hyphema syndrome of right eye

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H20.21: 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.

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.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE004
Uveitis and ocular inflammation
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Iridocyclitis

    acute or chronic inflammation of the iris and ciliary body characterized by exudates into the anterior chamber, discoloration of the iris, and constricted, sluggish pupil. symptoms include radiating pain, photophobia, lacrimation, and interference with vision.

Patient EducationClinical

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Convert H20.21 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
364.23 Lens-induced iridocyclit
Approximate The match is approximate rather than exact.

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 H20.21Overview

What is the ICD-10 code for lens-induced iridocyclitis, right eye?

The ICD-10-CM code for lens-induced iridocyclitis, right eye is H20.21 (sometimes written as H2021). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H20.21 (Lens-induced iridocyclitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report lens-induced iridocyclitis, right eye on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H20.21 group to?

When lens-induced iridocyclitis, right eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H20.21?

Under the General Equivalence Mappings, lens-induced iridocyclitis, right eye converts to ICD-9-CM 364.23 (lens-induced iridocyclit). The mapping is approximate, so confirm the match fits the documentation.