Billable / Specific Code
ICD-10-CM H40.009 is the diagnosis code for Preglaucoma, unspecified, unspecified eye. This code falls under the section "Glaucoma" within Chapter 7 — Diseases of the eye and adnexa (H00-H59). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where H40.009 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, H40.009 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
H40.009 is the ICD-10-CM diagnosis code for "Preglaucoma, unspecified, unspecified eye". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of H40.009 is H40.00 ("Preglaucoma, unspecified"). H40.009 provides a more specific classification within this category.
H40.009 is located in Section H40-H42 — "Glaucoma" within Chapter 7 of the ICD-10-CM Tabular List.
Use H40.009 when the patients documented diagnosis matches "Preglaucoma, unspecified, unspecified eye" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Preglaucoma, unspecified, unspecified eye is H40.009.
Yes, H40.009 can be used as a primary diagnosis code since it is billable and specific.
H40.009 is in Chapter 7 of the ICD-10-CM Tabular List.
Yes, H40.009 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.