H40.1120 — Primary open-angle glaucoma, left eye, stage unspecified
Is H40.1120 billable?
Yes, but H40.1120 is an unspecified code. H40.1120 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, H40.1120 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting H40.1120.
H40.1120 at a glance
| Code | H40.1120 |
|---|---|
| Description | Primary open-angle glaucoma, left eye, stage unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "0" | stage unspecified |
What does the 7th character "0" mean in H40.1120?
In H40.1120, the 7th character 0 means stage unspecified. The 7th character is required for H40.1120 to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does H40.1120 group to?
H40.1120 sits in MDC 02 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 124Other Disorders of the Eye with MCC or Thrombolytic Agentmedical
- 125Other Disorders of the Eye without MCCmedical
How is H40.1120 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under H40.11, the nearest indexed parent of H40.1120. Use them to find the family, then select the specific code.
- Glaucoma › simple
- Glaucoma › simplex
- Glaucoma › open angle › primary
Excludes1 — never code together — inherited from H40
The conditions below can never be reported together with H40.1120 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 H40.1120, but a patient may have both at the same time. When documentation supports it, H40.1120 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)
How long has H40.1120 existed?
H40.1120 first appears in FY2018 (FY2017 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.