H40.00 - Preglaucoma, unspecified

Version 2023
ICD-10:H40.00
Short Description:Preglaucoma, unspecified
Long Description:Preglaucoma, unspecified
Status: Not Valid for Submission
Version:ICD-10-CM 2023
Code Classification:

H40.00 is a non-specific and non-billable ICD-10 code code, consider using a code with a higher level of specificity for a diagnosis of preglaucoma, unspecified. The code is not specific and is NOT valid for the year 2023 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like H40.00 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Specific Coding for Preglaucoma, unspecified

Non-specific codes like H40.00 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for preglaucoma, unspecified:

  • BILLABLE CODE - Use H40.001 for Preglaucoma, unspecified, right eye
  • BILLABLE CODE - Use H40.002 for Preglaucoma, unspecified, left eye
  • BILLABLE CODE - Use H40.003 for Preglaucoma, unspecified, bilateral
  • BILLABLE CODE - Use H40.009 for Preglaucoma, unspecified, unspecified eye

Index to Diseases and Injuries References

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:

Patient Education


Glaucoma

Glaucoma is a group of diseases that can damage the eye's optic nerve. It is a leading cause of blindness in the United States. It usually happens when the fluid pressure inside the eyes slowly rises, damaging the optic nerve. Often there are no symptoms at first. Without treatment, people with glaucoma will slowly lose their peripheral, or side vision. They seem to be looking through a tunnel. Over time, straight-ahead vision may decrease until no vision remains.

A comprehensive eye exam can tell if you have glaucoma. People at risk should get eye exams at least every two years. They include:

There is no cure, but glaucoma can usually be controlled. Early treatment can help protect your eyes against vision loss. Treatments usually include prescription eyedrops and/or surgery.

NIH: National Eye Institute


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Code History