ICD-10-CM H40: Glaucoma

ICD-10-CM Diagnosis Code (2025)

Official Description for H40

Glaucoma

Coding Notes & Guidelines for H40

Excludes1: Not Coded Here
  • absolute glaucoma (H44.51-)
  • congenital glaucoma (Q15.0)
  • traumatic glaucoma due to birth injury (P15.3)
Excludes1: Not Coded Here
  • aqueous misdirection (H40.83-)
  • malignant glaucoma (H40.83-)
Use Additional Code

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Inclusion Terms

Open angle, low risk

Inclusion Terms

Open angle, high risk

Inclusion Terms

Primary angle closure suspect

Inclusion Terms

Chronic simple glaucoma

Inclusion Terms
  • Acute angle-closure glaucoma attack
  • Acute angle-closure glaucoma crisis
Inclusion Terms

Chronic primary angle closure glaucoma

Inclusion Terms

Malignant glaucoma

Code Also

underlying condition

Code Also

underlying condition

Code Also

underlying eye disorder

7th Character Guidance

One of the following 7th characters is to be assigned to code H40.10 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.11 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.12 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.13 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.14 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to code H40.20 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.22 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.3 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.4 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.5 to designate the stage of glaucoma

7th Character Guidance

One of the following 7th characters is to be assigned to each code in subcategory H40.6 to designate the stage of glaucoma

Child Codes (More Specific Codes for H40):

H40.0 - Glaucoma suspect H40.00 - Preglaucoma, unspecified H40.001 - Preglaucoma, unspecified, right eye H40.002 - Preglaucoma, unspecified, left eye H40.003 - Preglaucoma, unspecified, bilateral H40.009 - Preglaucoma, unspecified, unspecified eye H40.01 - Open angle with borderline findings, low risk H40.011 - Open angle with borderline findings, low risk, right eye H40.012 - Open angle with borderline findings, low risk, left eye H40.013 - Open angle with borderline findings, low risk, bilateral H40.019 - Open angle with borderline findings, low risk, unspecified eye H40.02 - Open angle with borderline findings, high risk H40.021 - Open angle with borderline findings, high risk, right eye H40.022 - Open angle with borderline findings, high risk, left eye H40.023 - Open angle with borderline findings, high risk, bilateral H40.029 - Open angle with borderline findings, high risk, unspecified eye H40.03 - Anatomical narrow angle H40.031 - Anatomical narrow angle, right eye H40.032 - Anatomical narrow angle, left eye H40.033 - Anatomical narrow angle, bilateral H40.039 - Anatomical narrow angle, unspecified eye H40.04 - Steroid responder H40.041 - Steroid responder, right eye H40.042 - Steroid responder, left eye H40.043 - Steroid responder, bilateral H40.049 - Steroid responder, unspecified eye H40.05 - Ocular hypertension H40.051 - Ocular hypertension, right eye H40.052 - Ocular hypertension, left eye H40.053 - Ocular hypertension, bilateral H40.059 - Ocular hypertension, unspecified eye H40.06 - Primary angle closure without glaucoma damage H40.061 - Primary angle closure without glaucoma damage, right eye H40.062 - Primary angle closure without glaucoma damage, left eye H40.063 - Primary angle closure without glaucoma damage, bilateral H40.069 - Primary angle closure without glaucoma damage, unspecified eye H40.1 - Open-angle glaucoma H40.10 - Unspecified open-angle glaucoma H40.11 - Primary open-angle glaucoma H40.111 - Primary open-angle glaucoma, right eye H40.112 - Primary open-angle glaucoma, left eye H40.113 - Primary open-angle glaucoma, bilateral H40.119 - Primary open-angle glaucoma, unspecified eye H40.12 - Low-tension glaucoma H40.121 - Low-tension glaucoma, right eye H40.122 - Low-tension glaucoma, left eye H40.123 - Low-tension glaucoma, bilateral H40.129 - Low-tension glaucoma, unspecified eye H40.13 - Pigmentary glaucoma H40.131 - Pigmentary glaucoma, right eye H40.132 - Pigmentary glaucoma, left eye H40.133 - Pigmentary glaucoma, bilateral H40.139 - Pigmentary glaucoma, unspecified eye H40.14 - Capsular glaucoma with pseudoexfoliation of lens H40.141 - Capsular glaucoma with pseudoexfoliation of lens, right eye H40.142 - Capsular glaucoma with pseudoexfoliation of lens, left eye H40.143 - Capsular glaucoma with pseudoexfoliation of lens, bilateral H40.149 - Capsular glaucoma with pseudoexfoliation of lens, unspecified eye H40.15 - Residual stage of open-angle glaucoma H40.151 - Residual stage of open-angle glaucoma, right eye H40.152 - Residual stage of open-angle glaucoma, left eye H40.153 - Residual stage of open-angle glaucoma, bilateral H40.159 - Residual stage of open-angle glaucoma, unspecified eye H40.2 - Primary angle-closure glaucoma H40.20 - Unspecified primary angle-closure glaucoma H40.21 - Acute angle-closure glaucoma H40.211 - Acute angle-closure glaucoma, right eye H40.212 - Acute angle-closure glaucoma, left eye H40.213 - Acute angle-closure glaucoma, bilateral H40.219 - Acute angle-closure glaucoma, unspecified eye H40.22 - Chronic angle-closure glaucoma H40.221 - Chronic angle-closure glaucoma, right eye H40.222 - Chronic angle-closure glaucoma, left eye H40.223 - Chronic angle-closure glaucoma, bilateral H40.229 - Chronic angle-closure glaucoma, unspecified eye H40.23 - Intermittent angle-closure glaucoma H40.231 - Intermittent angle-closure glaucoma, right eye H40.232 - Intermittent angle-closure glaucoma, left eye H40.233 - Intermittent angle-closure glaucoma, bilateral H40.239 - Intermittent angle-closure glaucoma, unspecified eye H40.24 - Residual stage of angle-closure glaucoma H40.241 - Residual stage of angle-closure glaucoma, right eye H40.242 - Residual stage of angle-closure glaucoma, left eye H40.243 - Residual stage of angle-closure glaucoma, bilateral H40.249 - Residual stage of angle-closure glaucoma, unspecified eye H40.3 - Glaucoma secondary to eye trauma H40.30 - Glaucoma secondary to eye trauma, unspecified eye H40.31 - Glaucoma secondary to eye trauma, right eye H40.32 - Glaucoma secondary to eye trauma, left eye H40.33 - Glaucoma secondary to eye trauma, bilateral H40.4 - Glaucoma secondary to eye inflammation H40.40 - Glaucoma secondary to eye inflammation, unspecified eye H40.41 - Glaucoma secondary to eye inflammation, right eye H40.42 - Glaucoma secondary to eye inflammation, left eye H40.43 - Glaucoma secondary to eye inflammation, bilateral H40.5 - Glaucoma secondary to other eye disorders H40.50 - Glaucoma secondary to other eye disorders, unspecified eye H40.51 - Glaucoma secondary to other eye disorders, right eye H40.52 - Glaucoma secondary to other eye disorders, left eye H40.53 - Glaucoma secondary to other eye disorders, bilateral H40.6 - Glaucoma secondary to drugs H40.60 - Glaucoma secondary to drugs, unspecified eye H40.61 - Glaucoma secondary to drugs, right eye H40.62 - Glaucoma secondary to drugs, left eye H40.63 - Glaucoma secondary to drugs, bilateral H40.8 - Other glaucoma H40.81 - Glaucoma with increased episcleral venous pressure H40.811 - Glaucoma with increased episcleral venous pressure, right eye H40.812 - Glaucoma with increased episcleral venous pressure, left eye H40.813 - Glaucoma with increased episcleral venous pressure, bilateral H40.819 - Glaucoma with increased episcleral venous pressure, unspecified eye H40.82 - Hypersecretion glaucoma H40.821 - Hypersecretion glaucoma, right eye H40.822 - Hypersecretion glaucoma, left eye H40.823 - Hypersecretion glaucoma, bilateral H40.829 - Hypersecretion glaucoma, unspecified eye H40.83 - Aqueous misdirection H40.831 - Aqueous misdirection, right eye H40.832 - Aqueous misdirection, left eye H40.833 - Aqueous misdirection, bilateral H40.839 - Aqueous misdirection, unspecified eye H40.89 - Other specified glaucoma H40.9 - Unspecified glaucoma

About ICD-10-CM Code H40 (Glaucoma)

ICD-10-CM code H40 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM H40 became effective on October 1, 2024.

This page provides detailed information about H40 - Glaucoma. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Glaucoma.