2026 ICD-10-CM Diagnosis Code R94.113Abnormal oculomotor study

ICD-10-CM Codes›R00–R99›R90-R94›R94

ICD-10-CM R94.113
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R94.113 is a billable ICD-10-CM diagnosis code for abnormal oculomotor study. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abnormal findings without diagnosis.

Code Identity

ICD-10-CM Code
R94.113
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal oculomotor study
Short Description
Abnormal oculomotor study
Same as the full description in the CMS dataset.
Parent Code
R94.11
Abnormal results of function studies of eye

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis
CategoryR94Abnormal results of function studies
This CodeR94.113Abnormal oculomotor study

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal ocular motility
  • Abnormal optokinetic response
  • Absence of downward movement of eye
  • Evaluation of oculomotor system abnormal
  • Eye does not move left
  • Eye does not move right
  • Eye does not move up
  • Heartbeat nystagmus
  • Limited downward eye movement
  • Limited eye movement
  • Limited leftward eye movement
  • Limited rightward eye movement
  • Limited upward eye movement
  • Optokinetic response - finding
  • Rotary nystagmus

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abnormal, abnormality, abnormalities
      • oculomotor study

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM017
Abnormal findings without diagnosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Eye Movement Disorders

When you look at an object, you're using several muscles to move both eyes to focus on it. If you have a problem with the muscles, the eyes don't work properly.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert R94.113 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
794.14 Abn oculomotor studies
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R94.113Overview

Is R94.113 (Abnormal results of function studies of eye) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal oculomotor study on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R94.113 group to?

When abnormal oculomotor study is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R94.113 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal oculomotor study is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R94.113?

Under the General Equivalence Mappings, abnormal oculomotor study converts to ICD-9-CM 794.14 (abn oculomotor studies). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.