2027 ICD-10-CM Diagnosis Code H57.9Unspecified disorder of eye and adnexa
H57.9 is a billable ICD-10-CM diagnosis code for unspecified disorder of eye and adnexa. 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. The code is not accepted as a principal diagnosis by the Medicare Code Editor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified eye disorders.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for H57.9.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute disease of eye
- Anomaly of eye
- Cataract due to inflammatory disorder
- Cataract due to ocular disease
- Cataract of bilateral eyes due to inflammatory disorder
- Cataract of left eye due to inflammatory disorder
- Cataract of left eye due to ocular disease
- Cataract of right eye due to inflammatory disorder
- Cataract of right eye due to ocular disease
- Chronic disease of ocular adnexa
- Diffuse mesangial sclerosis
- Diffuse mesangial sclerosis with ocular abnormalities
- Disorder of anterior segment of eye
- Disorder of bilateral eyes
- Disorder of eye proper co-occurrent with human immunodeficiency virus infection
- Disorder of eye region
- Disorder of left eye region
- Disorder of ocular adnexa
- Disorder of posterior segment of eye
- Disorder of right eye region
- Eye not working properly
- Eye symptom
- Hereditary disorder of the visual system
- Immunoglobulin G4 related ophthalmic disease
- Lesion of eye
- Neonatal ophthalmologic disorder
- Ophthalmological treatment changed
- Ophthalmological treatment started
- Restrictive ophthalmopathy
- Thyroid eye disease
- Visual system complication of procedure
- Visual system disorder
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H57.9: 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.
- 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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name H57.9, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
eye H57.9
Disorder (of) See Also: Disease;
eye H57.9
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 H57.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H57.9Overview
What is the ICD-10 code for unspecified disorder of eye and adnexa?
The ICD-10-CM code for unspecified disorder of eye and adnexa is H57.9 (sometimes written as H579). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H57.9 (Other disorders of eye and adnexa) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified disorder of eye and adnexa on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H57.9 group to?
On inpatient claims, unspecified disorder of eye and adnexa maps to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.
Can H57.9 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because unspecified disorder of eye and adnexa describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
What is the ICD-9 equivalent of H57.9?
Under the General Equivalence Mappings, unspecified disorder of eye and adnexa converts to ICD-9-CM 379.40 (abn pupil function NOS), 379.90 (eye disorder NOS), and V41.1 (eye problems NEC). The mapping is approximate, so confirm the match fits the documentation.
