2027 ICD-10-CM Diagnosis Code H47.642Disorders of visual cortex in (due to) vascular disorders, left side of brain
ICD-10-CM Codes›H00–H59›H46-H47›H47
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
H47.642 is a billable ICD-10-CM diagnosis code for disorders of visual cortex in (due to) vascular disorders, left side of brain. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neuro-ophthalmology.
Code Identity
Code Classification
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to H47.642: its own notes plus those printed at H47.6 and Chapter 7. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
left brain H47.642
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Vision Impairment and Blindness
Vision impairment is the loss of vision. It includes blindness, which means that you have lost all or most of your sight. It also includes low vision, which means you have some vision, but the vision loss makes it hard to do everyday activities. You may have trouble reading, shopping, cooking, writing, and watching TV.
The full article covers:
- What is vision impairment?
- What causes vision impairment?
- How is vision impairment diagnosed?
- What are the types of low vision?
- What are the treatments for low vision?
- How can I make the most of my remaining sight?
- Can vision impairment be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert H47.642 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H47.642Overview
Is H47.642 (Disorders of visual cortex in (due to) vascular disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report disorders of visual cortex in (due to) vascular disorders, left side of brain on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does H47.642 group to?
When disorders of visual cortex in (due to) vascular disorders, left side of brain 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 H47.642 a CC or MCC?
CMS lists H47.642 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.
Can H47.642 be reported with a code from S04.04?
Not as a rule. The Excludes1 note at H47.6, which applies to H47.642, lists "injury to visual cortex S04.04-". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of H47.642?
Under the General Equivalence Mappings, disorders of visual cortex in (due to) vascular disorders, left side of brain converts to ICD-9-CM 377.72 (vis cortx dis w vasc dis). The mapping is approximate, so confirm the match fits the documentation.
