ICD-10-CM Book 2026 Edition

Chapters  /  Chapter 7  /  H40-H42

Glaucoma (H40-H42)

H40 Glaucoma
Excludes1 absolute glaucoma (H44.51-)
congenital glaucoma (Q15.0)
traumatic glaucoma due to birth injury (P15.3)
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
Open angle, 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
Open angle, 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
Primary angle closure suspect
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
char7Note One of the following 7th characters is to be assigned to code H40.10 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
H40.11 Primary open-angle glaucoma
Chronic simple glaucoma
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.11 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.12 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.13 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.14 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
nonPrimary Yes
H40.152 Residual stage of open-angle glaucoma, left eye
nonPrimary Yes
H40.153 Residual stage of open-angle glaucoma, bilateral
nonPrimary Yes
H40.159 Residual stage of open-angle glaucoma, unspecified eye
nonPrimary Yes
H40.2 Primary angle-closure glaucoma
Excludes1 aqueous misdirection (H40.83-)
malignant glaucoma (H40.83-)
H40.20 Unspecified primary angle-closure glaucoma
char7Note One of the following 7th characters is to be assigned to code H40.20 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
H40.21 Acute angle-closure glaucoma
Acute angle-closure glaucoma attack
Acute angle-closure glaucoma crisis
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
Chronic primary angle closure glaucoma
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.22 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
CodeAlso underlying condition
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.3 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
CodeAlso underlying condition
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.4 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
CodeAlso underlying eye disorder
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.5 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
UseAdditionalCode code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
char7Note One of the following 7th characters is to be assigned to each code in subcategory H40.6 to designate the stage of glaucoma
char7Def 0: stage unspecified
1: mild stage
2: moderate stage
3: severe stage
4: indeterminate stage
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
Malignant glaucoma
H40.831 Aqueous misdirection, right eye
H40.832 Aqueous misdirection, left eye
H40.833 Aqueous misdirection, bilateral
H40.839 Aqueous misdirection, unspecified eye
H40.84 Neovascular secondary angle closure glaucoma
CodeFirst the underlying condition such as:
central retinal vein occlusion (H34.81)
diabetes mellitus (E08.39, E09.39, E10.39, E11.39, E13.39)
retinal ischemia (H35.82)
H40.841 Neovascular secondary angle closure glaucoma, right eye
H40.842 Neovascular secondary angle closure glaucoma, left eye
H40.843 Neovascular secondary angle closure glaucoma, bilateral
H40.849 Neovascular secondary angle closure glaucoma, unspecified eye
H40.89 Other specified glaucoma
H40.9 Unspecified glaucoma
H42 Glaucoma in diseases classified elsewhere
CodeFirst underlying condition, such as:
amyloidosis (E85.-)
aniridia (Q13.1)
glaucoma (in) diabetes mellitus (E08.39, E09.39, E10.39, E11.39, E13.39)
Lowe's syndrome (E72.03)
Rieger anomaly (Q13.81)
specified metabolic disorder (E70-E88)
Excludes1 glaucoma (in) onchocerciasis (B73.02)
glaucoma (in) syphilis (A52.71)
glaucoma (in) tuberculous (A18.59)
neovascular secondary angle closure glaucoma (H40.84-)
nonPrimary Yes