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ICD10BillableValid for clinical use

ICD-10 Code H28: Cataract in diseases classified elsewhere

H28 is a billable ICD-10 diagnosis code used to classify Cataract in diseases classified elsewhere in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the eye and adnexa (H00-H59).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the eye and adnexa (H00-H59).

When is it used?

  • May be used when a clinician documents cataract in diseases classified elsewhere in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
7Diseases of the eye and adnexa (H00-H59)
block
H25-H28Disorders of lens
currentH25-H28

Official coding notes

Applicable to
  • underlying disease, such as:
  • hypoparathyroidism (E20.-)
  • myotonia (G71.1-)
  • myxedema (E03.-)
  • protein-calorie malnutrition (E40-E46)
Excludes1 (do not code together)
  • cataract in diabetes mellitus (E08.36, E09.36, E10.36, E11.36, E13.36)
Code first
  • underlying disease, such as:
  • hypoparathyroidism (E20.-)
  • myotonia (G71.1-)
  • myxedema (E03.-)
  • protein-calorie malnutrition (E40-E46)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Ophthalmologist

Coverage-related procedures and services

CPT 66984high
EXTRACAPSULAR CATARACT REMOVAL WITH INSERTION OF INTRAOCULAR LENS PROSTHESIS (1 STAGE PROCEDURE), MANUAL OR MECHANICAL TECHNIQUE (EG, IRRIGATION AND ASPIRATION OR PHACOEMULSIFICATION); WITHOUT ENDOSCOPIC CYCLOPHOTOCOAGULATION
Source: CMS coverage guidance
CPT 66983high
INTRACAPSULAR CATARACT EXTRACTION WITH INSERTION OF INTRAOCULAR LENS PROSTHESIS (1 STAGE PROCEDURE)
Source: CMS coverage guidance
CPT 66840high
REMOVAL OF LENS MATERIAL; ASPIRATION TECHNIQUE, 1 OR MORE STAGES
Source: CMS coverage guidance
CPT 66940high
REMOVAL OF LENS MATERIAL; EXTRACAPSULAR (OTHER THAN 66840, 66850, 66852)
Source: CMS coverage guidance
CPT 66920high
REMOVAL OF LENS MATERIAL; INTRACAPSULAR
Source: CMS coverage guidance
CPT 66852high
REMOVAL OF LENS MATERIAL; PARS PLANA APPROACH, WITH OR WITHOUT VITRECTOMY
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
H28

Common synonyms

Cataract in diseases classified elsewhere

Frequently asked questions

Code details

CodeH28
SystemICD10
Display nameCataract in diseases classified elsewhere
ChapterDiseases of the eye and adnexa (H00-H59)
BlockDisorders of lens

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)Cataract(cortical) (immature) (incipient)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code H28 for Cataract in diseases classified elsewhere | HealthAssure