H47.42 — Disorders of optic chiasm in (due to) neoplasm
Is H47.42 billable?
Yes — H47.42 is billable for FY2027. H47.42 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. H47.42 may be submitted for encounters from October 1, 2026 through September 30, 2027.
H47.42 at a glance
| Code | H47.42 |
|---|---|
| Description | Disorders of optic chiasm in (due to) neoplasm |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does H47.42 group to?
H47.42 sits in MDC 01 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 091Other Disorders of Nervous System with MCCmedical
- 092Other Disorders of Nervous System with CCmedical
- 093Other Disorders of Nervous System without CC/MCCmedical
As a secondary diagnosis, H47.42 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is H47.42 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to H47.42. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Disorder › optic › chiasm › due to › neoplasm (of)
Excludes2 — not included here — inherited from Chapter 7
The conditions below are not part of H47.42, but a patient may have both at the same time. When documentation supports it, H47.42 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 H47.4
Two codes may be needed to describe the condition fully. Whether H47.42 is sequenced first depends on the reason for the encounter.
- underlying condition
How long has H47.42 existed?
H47.42 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.