H40 — Glaucoma
Not billable
Is H40 billable?
No — H40 is a non-billable header code. H40 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath H40.
Billable codes under this header
- H40.9Unspecified glaucoma
- H40.89Other specified glaucoma
- H40.001Preglaucoma, unspecified, right eye
- H40.002Preglaucoma, unspecified, left eye
- H40.003Preglaucoma, unspecified, bilateral
- H40.009Preglaucoma, unspecified, unspecified eye
- H40.011Open angle with borderline findings, low risk, right eye
- H40.012Open angle with borderline findings, low risk, left eye
- H40.013Open angle with borderline findings, low risk, bilateral
- H40.019Open angle with borderline findings, low risk, unspecified eye
- H40.021Open angle with borderline findings, high risk, right eye
- H40.022Open angle with borderline findings, high risk, left eye
- H40.023Open angle with borderline findings, high risk, bilateral
- H40.029Open angle with borderline findings, high risk, unspecified eye
- H40.031Anatomical narrow angle, right eye
- H40.032Anatomical narrow angle, left eye
- H40.033Anatomical narrow angle, bilateral
- H40.039Anatomical narrow angle, unspecified eye
- H40.041Steroid responder, right eye
- H40.042Steroid responder, left eye
- H40.043Steroid responder, bilateral
- H40.049Steroid responder, unspecified eye
- H40.051Ocular hypertension, right eye
- H40.052Ocular hypertension, left eye
- H40.053Ocular hypertension, bilateral
- H40.059Ocular hypertension, unspecified eye
- H40.061Primary angle closure without glaucoma damage, right eye
- H40.062Primary angle closure without glaucoma damage, left eye
- H40.063Primary angle closure without glaucoma damage, bilateral
- H40.069Primary angle closure without glaucoma damage, unspecified eye
- H40.10X0Unspecified open-angle glaucoma, stage unspecified
- H40.10X1Unspecified open-angle glaucoma, mild stage
- H40.10X2Unspecified open-angle glaucoma, moderate stage
- H40.10X3Unspecified open-angle glaucoma, severe stage
- H40.10X4Unspecified open-angle glaucoma, indeterminate stage
- H40.151Residual stage of open-angle glaucoma, right eye
- H40.152Residual stage of open-angle glaucoma, left eye
- H40.153Residual stage of open-angle glaucoma, bilateral
- H40.159Residual stage of open-angle glaucoma, unspecified eye
- H40.20X0Unspecified primary angle-closure glaucoma, stage unspecified
- H40.20X1Unspecified primary angle-closure glaucoma, mild stage
- H40.20X2Unspecified primary angle-closure glaucoma, moderate stage
- H40.20X3Unspecified primary angle-closure glaucoma, severe stage
- H40.20X4Unspecified primary angle-closure glaucoma, indeterminate stage
- H40.211Acute angle-closure glaucoma, right eye
- H40.212Acute angle-closure glaucoma, left eye
- H40.213Acute angle-closure glaucoma, bilateral
- H40.219Acute angle-closure glaucoma, unspecified eye
- H40.231Intermittent angle-closure glaucoma, right eye
- H40.232Intermittent angle-closure glaucoma, left eye
- H40.233Intermittent angle-closure glaucoma, bilateral
- H40.239Intermittent angle-closure glaucoma, unspecified eye
- H40.241Residual stage of angle-closure glaucoma, right eye
- H40.242Residual stage of angle-closure glaucoma, left eye
- H40.243Residual stage of angle-closure glaucoma, bilateral
- H40.249Residual stage of angle-closure glaucoma, unspecified eye
- H40.30X0Glaucoma secondary to eye trauma, unspecified eye, stage unspecified
- H40.30X1Glaucoma secondary to eye trauma, unspecified eye, mild stage
- H40.30X2Glaucoma secondary to eye trauma, unspecified eye, moderate stage
- H40.30X3Glaucoma secondary to eye trauma, unspecified eye, severe stage
H40 at a glance
| Code | H40 |
|---|---|
| Description | Glaucoma |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with H40 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 7
The conditions below are not part of H40, but a patient may have both at the same time. When documentation supports it, H40 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury (trauma) of eye and orbit (S05.-)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
What codes fall under H40? (9)
- H40.0Glaucoma suspectnot billable
- H40.1Open-angle glaucomanot billable
- H40.2Primary angle-closure glaucomanot billable
- H40.3Glaucoma secondary to eye traumanot billable
- H40.4Glaucoma secondary to eye inflammationnot billable
- H40.5Glaucoma secondary to other eye disordersnot billable
- H40.6Glaucoma secondary to drugsnot billable
- H40.8Other glaucomanot billable
- H40.9Unspecified glaucoma
How long has H40 existed?
H40 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with H40?
ICD-10-CM declares these codes mutually exclusive with H40 — exactly one of each pair can be correct for a given encounter.