2027 ICD-10-CM Diagnosis Code H47.42Disorders of optic chiasm in (due to) neoplasm
ICD-10-CM Codes›H00–H59›H46-H47›H47
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
H47.42 is a billable ICD-10-CM diagnosis code for disorders of optic chiasm in (due to) neoplasm. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 13 closely related codes. Coders also document this condition as disorder of optic chiasm associated with non-pituitary neoplasm. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Conditions due to neoplasm or the treatment of neoplasm and Neuro-ophthalmology.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Disorder of optic chiasm associated with non-pituitary neoplasm
- Disorder of optic chiasm due to neoplasm
- Disorder of optic chiasm due to non-pituitary neoplasm
- Disorder of visual pathways associated with neoplasm
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H47.42: its own notes plus those printed at H47.4 and Chapter 7. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may 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
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- underlying condition
Notes
General instructions on how these codes are used.
- Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Optic Nerve Disorders
The optic nerve is a bundle of more than 1 million nerve fibers that carry visual messages. You have one connecting the back of each eye (your retina) to your brain. Damage to an optic nerve can cause vision loss. The type of vision loss and how severe it is depends on where the damage occurs. It may affect one or both eyes.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H47.42 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H47.42Overview
What is the ICD-10 code for disorders of optic chiasm in (due to) neoplasm?
The ICD-10-CM code for disorders of optic chiasm in (due to) neoplasm is H47.42 (sometimes written as H4742). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is H47.42 (Disorders of optic chiasm) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report disorders of optic chiasm in (due to) neoplasm on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H47.42 group to?
When disorders of optic chiasm in (due to) neoplasm is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.
Is H47.42 a CC or MCC?
CMS lists H47.42 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 13 closely related codes in its exclusion list.
What is the ICD-9 equivalent of H47.42?
Under the General Equivalence Mappings, disorders of optic chiasm in (due to) neoplasm converts to ICD-9-CM 377.52 (opt chiasm dis/neopl NEC). The mapping is approximate, so confirm the match fits the documentation.
