2027 ICD-10-CM Diagnosis Code H21.1X3Other vascular disorders of iris and ciliary body, bilateral
ICD-10-CM Codes›H00–H59›H15-H22›H21
- Billable — Valid for Submission
- Chronic Condition
H21.1X3 is a billable ICD-10-CM diagnosis code for other vascular disorders of iris and ciliary body, bilateral. 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 Other specified eye disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute angle closure of left eye due to neovascularization
- Acute angle closure of right eye due to neovascularization
- Angle closure of left eye due to neovascularization
- Angle closure of right eye due to neovascularization
- Bilateral acute angle closure
- Bilateral acute angle closure due to neovascularization
- Bilateral angle closure due to neovascularization
- Bilateral neovascular angle closure glaucoma
- Bilateral neovascularization of iridocorneal angle
- Bilateral open angle glaucoma due to neovascularization
- Bilateral rubeosis iridis of eyes
- Bilateral secondary acute angle closure
- Bilateral secondary angle closure glaucoma
- Neovascular angle closure glaucoma
- Neovascular angle closure glaucoma of left eye
- Neovascular angle closure glaucoma of right eye
- Neovascularization of angle of left eye
- Neovascularization of angle of right eye
- Open angle glaucoma of left eye due to neovascularization
- Open angle glaucoma of right eye due to neovascularization
- Rubeosis iridis
- Rubeosis iridis of left eye
- Rubeosis iridis of right eye
- Secondary acute angle closure due to neovascularization
- Secondary angle closure due to neovascularization
- Secondary open angle glaucoma due to neovascularization
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H21.1X3: its own notes plus those printed at H21 and 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.
- 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.
- 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.
Patient EducationClinical
Eye Diseases
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.
The full article covers:
- What diseases can affect the eye?
- What are the symptoms of eye diseases?
- Who is more likely to develop eye diseases?
- What are the treatments for eye diseases?
- Can eye diseases be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H21.1X3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H21.1X3Overview
What is the ICD-10 code for other vascular disorders of iris and ciliary body, bilateral?
The ICD-10-CM code for other vascular disorders of iris and ciliary body, bilateral is H21.1X3 (sometimes written as H211X3). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H21.1X3 (Other vascular disorders of iris and ciliary body) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other vascular disorders of iris and ciliary body, bilateral on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H21.1X3 group to?
When other vascular disorders of iris and ciliary body, bilateral 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 H21.1X3?
Under the General Equivalence Mappings, other vascular disorders of iris and ciliary body, bilateral converts to ICD-9-CM 364.42 (rubeosis iridis). The mapping is approximate, so confirm the match fits the documentation.
