DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

H40 Glaucoma

  • Header · not billable
  • Some codes take a 7th character

H40 is not billable. The category heads 252 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

Where it sits

  1. Chapter 7 Diseases of the eye and adnexa (H00-H59)
  2. H40-H42 Glaucoma (H40-H42)
  3. H40 Glaucoma
Billable codes
252
Subdivisions
9
CC / MCC codes
4 / 0
HCC V28 codes
0
New FY2027
0
Index entries
40

Codes in H40

  1. H40.0
    Glaucoma suspect
    Header
  2. H40.00
    Preglaucoma, unspecified
    Header
  3. H40.001
    Preglaucoma, unspecified, right eye
    Billable
  4. H40.002
    Preglaucoma, unspecified, left eye
    Billable
  5. H40.003
    Preglaucoma, unspecified, bilateral
    Billable
  6. H40.009
    Preglaucoma, unspecified, unspecified eye
    Billable
  7. H40.01
    Open angle with borderline findings, low risk
    Header
    Inclusion terms 1

    Inclusion terms

    • Open angle, low risk
  8. H40.011
    Open angle with borderline findings, low risk, right eye
    Billable
  9. H40.012
    Open angle with borderline findings, low risk, left eye
    Billable
  10. H40.013
    Open angle with borderline findings, low risk, bilateral
    Billable
  11. H40.019
    Open angle with borderline findings, low risk, unspecified eye
    Billable
  12. H40.02
    Open angle with borderline findings, high risk
    Header
    Inclusion terms 1

    Inclusion terms

    • Open angle, high risk
  13. H40.021
    Open angle with borderline findings, high risk, right eye
    Billable
  14. H40.022
    Open angle with borderline findings, high risk, left eye
    Billable
  15. H40.023
    Open angle with borderline findings, high risk, bilateral
    Billable
  16. H40.029
    Open angle with borderline findings, high risk, unspecified eye
    Billable
  17. H40.03
    Anatomical narrow angle
    Header
    Inclusion terms 1

    Inclusion terms

    • Primary angle closure suspect
  18. H40.031
    Anatomical narrow angle, right eye
    Billable
  19. H40.032
    Anatomical narrow angle, left eye
    Billable
  20. H40.033
    Anatomical narrow angle, bilateral
    Billable
  21. H40.039
    Anatomical narrow angle, unspecified eye
    Billable
  22. H40.04
    Steroid responder
    Header
  23. H40.041
    Steroid responder, right eye
    Billable
  24. H40.042
    Steroid responder, left eye
    Billable
  25. H40.043
    Steroid responder, bilateral
    Billable
  26. H40.049
    Steroid responder, unspecified eye
    Billable
  27. H40.05
    Ocular hypertension
    Header
  28. H40.051
    Ocular hypertension, right eye
    Billable
  29. H40.052
    Ocular hypertension, left eye
    Billable
  30. H40.053
    Ocular hypertension, bilateral
    Billable
  31. H40.059
    Ocular hypertension, unspecified eye
    Billable
  32. H40.06
    Primary angle closure without glaucoma damage
    Header
  33. H40.061
    Primary angle closure without glaucoma damage, right eye
    Billable
  34. H40.062
    Primary angle closure without glaucoma damage, left eye
    Billable
  35. H40.063
    Primary angle closure without glaucoma damage, bilateral
    Billable
  36. H40.069
    Primary angle closure without glaucoma damage, unspecified eye
    Billable
  37. H40.1
    Open-angle glaucoma
    Header
  38. H40.10
    Unspecified open-angle glaucoma +7th: 0 1 2 3 4
    Needs 7th character
  39. H40.11
    Primary open-angle glaucoma
    Header
    Inclusion terms 1

    Inclusion terms

    • Chronic simple glaucoma
  40. H40.111
    Primary open-angle glaucoma, right eye +7th: 0 1 2 3 4
    Needs 7th character
  41. H40.112
    Primary open-angle glaucoma, left eye +7th: 0 1 2 3 4
    Needs 7th character
  42. H40.113
    Primary open-angle glaucoma, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  43. H40.119
    Primary open-angle glaucoma, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  44. H40.12
    Low-tension glaucoma
    Header
  45. H40.121
    Low-tension glaucoma, right eye +7th: 0 1 2 3 4
    Needs 7th character
  46. H40.122
    Low-tension glaucoma, left eye +7th: 0 1 2 3 4
    Needs 7th character
  47. H40.123
    Low-tension glaucoma, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  48. H40.129
    Low-tension glaucoma, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  49. H40.13
    Pigmentary glaucoma
    Header
  50. H40.131
    Pigmentary glaucoma, right eye +7th: 0 1 2 3 4
    Needs 7th character
  51. H40.132
    Pigmentary glaucoma, left eye +7th: 0 1 2 3 4
    Needs 7th character
  52. H40.133
    Pigmentary glaucoma, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  53. H40.139
    Pigmentary glaucoma, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  54. H40.14
    Capsular glaucoma with pseudoexfoliation of lens
    Header
  55. H40.141
    Capsular glaucoma with pseudoexfoliation of lens, right eye +7th: 0 1 2 3 4
    Needs 7th character
  56. H40.142
    Capsular glaucoma with pseudoexfoliation of lens, left eye +7th: 0 1 2 3 4
    Needs 7th character
  57. H40.143
    Capsular glaucoma with pseudoexfoliation of lens, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  58. H40.149
    Capsular glaucoma with pseudoexfoliation of lens, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  59. H40.15
    Residual stage of open-angle glaucoma
    Header
  60. H40.151
    Residual stage of open-angle glaucoma, right eye
    Billable
  61. H40.152
    Residual stage of open-angle glaucoma, left eye
    Billable
  62. H40.153
    Residual stage of open-angle glaucoma, bilateral
    Billable
  63. H40.159
    Residual stage of open-angle glaucoma, unspecified eye
    Billable
  64. H40.2
    Primary angle-closure glaucoma
    Header
    Excludes1 2

    Excludes1

    • aqueous misdirection (H40.83-) H40.83
    • malignant glaucoma (H40.83-) H40.83
  65. H40.20
    Unspecified primary angle-closure glaucoma +7th: 0 1 2 3 4
    Needs 7th character
  66. H40.21
    Acute angle-closure glaucoma
    Header
    Inclusion terms 2

    Inclusion terms

    • Acute angle-closure glaucoma attack
    • Acute angle-closure glaucoma crisis
  67. H40.211
    Acute angle-closure glaucoma, right eye
    BillableCC
  68. H40.212
    Acute angle-closure glaucoma, left eye
    BillableCC
  69. H40.213
    Acute angle-closure glaucoma, bilateral
    BillableCC
  70. H40.219
    Acute angle-closure glaucoma, unspecified eye
    BillableCC
  71. H40.22
    Chronic angle-closure glaucoma
    Header
    Inclusion terms 1

    Inclusion terms

    • Chronic primary angle closure glaucoma
  72. H40.221
    Chronic angle-closure glaucoma, right eye +7th: 0 1 2 3 4
    Needs 7th character
  73. H40.222
    Chronic angle-closure glaucoma, left eye +7th: 0 1 2 3 4
    Needs 7th character
  74. H40.223
    Chronic angle-closure glaucoma, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  75. H40.229
    Chronic angle-closure glaucoma, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  76. H40.23
    Intermittent angle-closure glaucoma
    Header
  77. H40.231
    Intermittent angle-closure glaucoma, right eye
    Billable
  78. H40.232
    Intermittent angle-closure glaucoma, left eye
    Billable
  79. H40.233
    Intermittent angle-closure glaucoma, bilateral
    Billable
  80. H40.239
    Intermittent angle-closure glaucoma, unspecified eye
    Billable
  81. H40.24
    Residual stage of angle-closure glaucoma
    Header
  82. H40.241
    Residual stage of angle-closure glaucoma, right eye
    Billable
  83. H40.242
    Residual stage of angle-closure glaucoma, left eye
    Billable
  84. H40.243
    Residual stage of angle-closure glaucoma, bilateral
    Billable
  85. H40.249
    Residual stage of angle-closure glaucoma, unspecified eye
    Billable
  86. H40.3
    Glaucoma secondary to eye trauma
    Header
    Code also 1

    Code also

    • underlying condition
  87. H40.30
    Glaucoma secondary to eye trauma, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  88. H40.31
    Glaucoma secondary to eye trauma, right eye +7th: 0 1 2 3 4
    Needs 7th character
  89. H40.32
    Glaucoma secondary to eye trauma, left eye +7th: 0 1 2 3 4
    Needs 7th character
  90. H40.33
    Glaucoma secondary to eye trauma, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  91. H40.4
    Glaucoma secondary to eye inflammation
    Header
    Code also 1

    Code also

    • underlying condition
  92. H40.40
    Glaucoma secondary to eye inflammation, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  93. H40.41
    Glaucoma secondary to eye inflammation, right eye +7th: 0 1 2 3 4
    Needs 7th character
  94. H40.42
    Glaucoma secondary to eye inflammation, left eye +7th: 0 1 2 3 4
    Needs 7th character
  95. H40.43
    Glaucoma secondary to eye inflammation, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  96. H40.5
    Glaucoma secondary to other eye disorders
    Header
    Code also 1

    Code also

    • underlying eye disorder
  97. H40.50
    Glaucoma secondary to other eye disorders, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  98. H40.51
    Glaucoma secondary to other eye disorders, right eye +7th: 0 1 2 3 4
    Needs 7th character
  99. H40.52
    Glaucoma secondary to other eye disorders, left eye +7th: 0 1 2 3 4
    Needs 7th character
  100. H40.53
    Glaucoma secondary to other eye disorders, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  101. H40.6
    Glaucoma secondary to drugs
    Header
    Use additional code 1

    Use additional code

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) T36 T50
  102. H40.60
    Glaucoma secondary to drugs, unspecified eye +7th: 0 1 2 3 4
    Needs 7th character
  103. H40.61
    Glaucoma secondary to drugs, right eye +7th: 0 1 2 3 4
    Needs 7th character
  104. H40.62
    Glaucoma secondary to drugs, left eye +7th: 0 1 2 3 4
    Needs 7th character
  105. H40.63
    Glaucoma secondary to drugs, bilateral +7th: 0 1 2 3 4
    Needs 7th character
  106. H40.8
    Other glaucoma
    Header
  107. H40.81
    Glaucoma with increased episcleral venous pressure
    Header
  108. H40.811
    Glaucoma with increased episcleral venous pressure, right eye
    Billable
  109. H40.812
    Glaucoma with increased episcleral venous pressure, left eye
    Billable
  110. H40.813
    Glaucoma with increased episcleral venous pressure, bilateral
    Billable
  111. H40.819
    Glaucoma with increased episcleral venous pressure, unspecified eye
    Billable
  112. H40.82
    Hypersecretion glaucoma
    Header
  113. H40.821
    Hypersecretion glaucoma, right eye
    Billable
  114. H40.822
    Hypersecretion glaucoma, left eye
    Billable
  115. H40.823
    Hypersecretion glaucoma, bilateral
    Billable
  116. H40.829
    Hypersecretion glaucoma, unspecified eye
    Billable
  117. H40.83
    Aqueous misdirection
    Header
    Inclusion terms 1

    Inclusion terms

    • Malignant glaucoma
  118. H40.831
    Aqueous misdirection, right eye
    Billable
  119. H40.832
    Aqueous misdirection, left eye
    Billable
  120. H40.833
    Aqueous misdirection, bilateral
    Billable
  121. H40.839
    Aqueous misdirection, unspecified eye
    Billable
  122. H40.84
    Neovascular secondary angle closure glaucoma
    Header
    Code also 4

    Code also

  123. H40.841
    Neovascular secondary angle closure glaucoma, right eye
    Billable
  124. H40.842
    Neovascular secondary angle closure glaucoma, left eye
    Billable
  125. H40.843
    Neovascular secondary angle closure glaucoma, bilateral
    Billable
  126. H40.849
    Neovascular secondary angle closure glaucoma, unspecified eye
    Billable
  127. H40.89
    Other specified glaucoma
    Billable
  128. H40.9
    Unspecified glaucoma
    Billable

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At H40

Excludes1

  • absolute glaucoma (H44.51-) H44.51
  • congenital glaucoma (Q15.0) Q15.0
  • traumatic glaucoma due to birth injury (P15.3) P15.3

Notes that also apply

Chapter 7 instructions (Notes 1, Excludes2 11): printed on the chapter 7 page.

7th characters

7th characters for H40.3 defined at H40.3

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

7th characters for H40.3
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.4 defined at H40.4

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

7th characters for H40.4
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.5 defined at H40.5

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

7th characters for H40.5
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.6 defined at H40.6

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

7th characters for H40.6
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.10 defined at H40.10

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

7th characters for H40.10
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.11 defined at H40.11

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

7th characters for H40.11
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.12 defined at H40.12

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

7th characters for H40.12
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.13 defined at H40.13

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

7th characters for H40.13
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.14 defined at H40.14

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

7th characters for H40.14
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.20 defined at H40.20

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

7th characters for H40.20
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

7th characters for H40.22 defined at H40.22

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

7th characters for H40.22
7thMeaning (NCHS)
0stage unspecified
1mild stage
2moderate stage
3severe stage
4indeterminate stage

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Index entries

  • Preglaucoma → H40.00-
  • Anatomical narrow angle → H40.03-
  • Aqueous misdirection → H40.83-
  • Misdirection, aqueous → H40.83-
  • Glaucoma → H40.9
  • Glaucomaborderline → H40.00-
  • Glaucomasuspect → H40.00-
  • Narrowanterior chamber angle → H40.03-
  • Steroidresponder → H40.04-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)ocular → H40.05-
  • Closureprimary angle, without glaucoma damage → H40.06-
  • Glaucomaopen angle → H40.10-
  • Glaucomasimple (chronic) → H40.11-
  • Glaucomasimplex → H40.11-
  • Glaucomaangle-closure (primary) → H40.20-
  • Plateau iris syndrome (post-iridectomy) (postprocedural) (without glaucoma)with glaucoma → H40.22-
  • Glaucomasecondary (to) → H40.5-
  • Glaucomahypersecretion → H40.82-
  • Glaucomamalignant → H40.83-
  • Glaucomaneovascular secondary angle closure → H40.84-
  • Glaucomaspecified type NEC → H40.89
  • Open, openingangle withcupping of discs → H40.01-
  • Pressureincreasedintraocular → H40.05-
  • Glaucomaopen angleprimary → H40.11-
  • Glaucomaangle-closure (primary)acute (attack) (crisis) → H40.21-
  • Glaucomaangle-closure (primary)chronic → H40.22-
  • Glaucomaangle-closure (primary)intermittent → H40.23-
  • Glaucomaangle-closure (primary)residual stage → H40.24-
  • Glaucomasecondary (to)trauma → H40.3-
  • Glaucomasecondary (to)inflammation → H40.4-
  • Glaucomasecondary (to)drugs → H40.6-
  • Glaucomawithincreased episcleral venous pressure → H40.81-
  • Glaucomaangle-closure (primary)secondary, neovascular → H40.84-
  • Open, openingangle withborderlineintraocular pressure → H40.00-
  • Glaucomaopen angleprimarylow-tension → H40.12-
  • Glaucomaopen angleprimarypigmentary → H40.13-
  • Glaucomaopen angleprimarycapsular (with pseudoexfoliation of lens) → H40.14-
  • Glaucomaopen angleprimaryresidual stage → H40.15-
  • Open, openingangle withborderlinefindingslow risk → H40.01-
  • Open, openingangle withborderlinefindingshigh risk → H40.02-

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy