2027 ICD-10-CM Diagnosis Code H28Cataract in diseases classified elsewhere
ICD-10-CM Codes›H00–H59›H25-H28›H28
- Billable — Valid for Submission
- Chronic Condition
H28 is a billable ICD-10-CM diagnosis code for cataract in diseases classified elsewhere. 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 a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as cataract due to degenerative disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cataract and other lens disorders.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for H28.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cataract due to degenerative disorder
- Cataract due to dehydration
- Cataract due to idiopathic hypoparathyroidism
- Cataract due to pseudohypoparathyroidism
- Cataract due to undernutrition
- Cataract in systemic disorders
- Hyperferritinemia cataract syndrome
- Polyneuropathy, hearing loss, ataxia, retinitis pigmentosa, cataract syndrome
- Tetanic cataract
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H28: its own notes plus those printed at Chapter 7. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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)
Code First
The underlying condition named in the note is sequenced before this code.
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
Cataract
A cataract is a clouding of the clear lens inside your eye. This cloudiness blocks light from reaching the back of the eye, making it harder to see clearly. A cataract can affect one or both eyes, but it doesn't spread from one eye to the other.
The full article covers:
- What are cataracts?
- What causes cataracts?
- Who is more likely to develop cataracts?
- What are the symptoms of cataracts?
- How are cataracts diagnosed?
- How are cataracts treated?
- Can cataracts be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H28 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H28Overview
What is the ICD-10 code for cataract in diseases classified elsewhere?
The ICD-10-CM code for cataract in diseases classified elsewhere is H28. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H28 (Cataract in diseases classified elsewhere) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report cataract in diseases classified elsewhere on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H28 group to?
On inpatient claims, cataract in diseases classified elsewhere 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 H28 be a principal diagnosis?
No. This is a manifestation code: cataract in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
Can H28 be reported with E08.36?
Not as a rule. The Excludes1 note on H28 lists "cataract in diabetes mellitus (E08.36, E09.36, E10.36, E11.36, E13.36)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
