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ICD-10-CM 2027 diagnosis code

R94.113Abnormal oculomotor study

✓ Billable / specific

R94.113 is a valid, billable ICD-10-CM code for abnormal oculomotor study. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R94.113

R94.113 is the ICD-10-CM diagnosis code for abnormal oculomotor study. It belongs to category R94 (abnormal results of function studies), block R90-R94 (abnormal findings on diagnostic imaging and in function studies, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R94.11 (abnormal results of function studies of eye), R94.113 is specifically for abnormal oculomotor study. Related codes cover electro-oculogram [EOG] (R94.110), electroretinogram [ERG] (R94.111), visually evoked potential [VEP] (R94.112) and results of other function studies of eye (R94.118).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 794.14 (nonspecific abnormal oculomotor studies).

Notes that apply from higher levels

Instructions written at a parent level also apply to R94.113.

› From R94 Abnormal results of function studies
Includes
  • abnormal results of radionuclide [radioisotope] uptake studies
  • abnormal results of scintigraphy

Broader instructions also apply from R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis and Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to R94.113.

Codes whose notes reference R94.113

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 794.14Nonspecific abnormal oculomotor studiesexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about R94.113

Is R94.113 billable?

Yes. R94.113 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R94.113 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R94.113 as a principal diagnosis.

Is R94.113 a CC or MCC?

No. R94.113 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R94.113 group to?

R94.113 is used in the MS-DRG v44.0 logic for MS-DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent) and MS-DRG 125 (Other Disorders of the Eye without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for R94.113?

The CMS General Equivalence Mappings map R94.113 to ICD-9-CM 794.14.