ICD-10-CM Code H42
Glaucoma in diseases classified elsewhere
Billable CodeBillable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
Manifestation CodeCertain ICD-10-CM codes identify an underlying condition known as an etiology code. Conditions that arise as a result of an underlying condition (etiology), are referred to as Manifestations. In ICD-10-CM, etiology codes must be coded first, followed by the manifestation codes. When a condition requires etiology and manifestation codes, there is a "use additional code" note following the etiology code and a "code first" note following the manifestation code.
H42 is a billable ICD code used to specify a diagnosis of glaucoma in diseases classified elsewhere. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
The ICD code H42 is used to code Glaucoma
Glaucoma is a group of eye diseases which result in damage to the optic nerve and vision loss. A major risk factor is increased pressure in the eye. The disorders can be roughly divided into two main categories: "open-angle" and "closed-angle" (or "angle closure") glaucoma. Open-angle chronic glaucoma is painless, tends to develop slowly over time and often has no symptoms until the disease has progressed significantly. Closed angle glaucoma is usually chronic and asymptomatic but can present all of a sudden as well. This involves sudden eye pain, blurred vision, mid-dilated pupil, redness, nausea and vomiting, resulting from a sudden spike in intraocular pressure from iridotrabecular contact. Glaucoma can permanently damage vision in the affected eye, first by decreasing peripheral vision (reducing the visual field), and then potentially leading to blindness if left untreated.
|ICD 9 Code:||365|
Acute angle closure glaucoma of the right eye. Note the mid-sized pupil, which was nonreactive to light, and redness of the conjunctiva.
Coding Notes for H42 Info for medical coders on how to properly use this ICD-10 code
- Underlying condition, such as:
- Amyloidosis See code E85.-
- Aniridia See code Q13.1
- Lowe's syndrome See code E72.03
- Reiger's anomaly See code Q13.81
- Specified metabolic disorder See Section E70-E88
Code Type-1 Excludes:
Type-1 ExcludesType-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here."
- Glaucoma (in):
- Diabetes mellitus (E08.39, E09.39, E10.39, E11.39, E13.39) - instead, use code E08.39
- Onchocerciasis - instead, use code B73.02
- Syphilis - instead, use code A52.71
- Tuberculous - instead, use code A18.59
- DRG Group #124-125 - Other disorders of the eye with MCC.
- DRG Group #124-125 - Other disorders of the eye without MCC.
Related Concepts SNOMET-CT
- Neovascular glaucoma (disorder)
Coding Advice SNOMET-CT
- Consider additional code to identify specific condition or disease
- This is a manifestation code for use in a secondary position
Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)
This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code H42 and a single ICD9 code, 365.44 is an approximate match for comparison and conversion purposes.