H40.42 — Glaucoma secondary to eye inflammation, left eye
Is H40.42 billable?
No — H40.42 is a non-billable header code. H40.42 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 5 billable codes beneath H40.42.
Billable codes under this header
- H40.42X0Glaucoma secondary to eye inflammation, left eye, stage unspecified
- H40.42X1Glaucoma secondary to eye inflammation, left eye, mild stage
- H40.42X2Glaucoma secondary to eye inflammation, left eye, moderate stage
- H40.42X3Glaucoma secondary to eye inflammation, left eye, severe stage
- H40.42X4Glaucoma secondary to eye inflammation, left eye, indeterminate stage
H40.42 at a glance
| Code | H40.42 |
|---|---|
| Description | Glaucoma secondary to eye inflammation, left eye |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is H40.42 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under H40.4, the nearest indexed parent of H40.42. Use them to find the family, then select the specific code.
- Glaucoma › secondary › inflammation
Excludes1 — never code together — inherited from H40
The conditions below can never be reported together with H40.42 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 H40.42, but a patient may have both at the same time. When documentation supports it, H40.42 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)
Code also — inherited from H40.4
Two codes may be needed to describe the condition fully. Whether H40.42 is sequenced first depends on the reason for the encounter.
- underlying condition
What codes fall under H40.42? (5)
- H40.42X0Glaucoma secondary to eye inflammation, left eye, stage unspecified
- H40.42X1Glaucoma secondary to eye inflammation, left eye, mild stage
- H40.42X2Glaucoma secondary to eye inflammation, left eye, moderate stage
- H40.42X3Glaucoma secondary to eye inflammation, left eye, severe stage
- H40.42X4Glaucoma secondary to eye inflammation, left eye, indeterminate stage
How long has H40.42 existed?
H40.42 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.