2026 ICD-10-CM Diagnosis Code R94.111Abnormal electroretinogram [ERG]
ICD-10-CM Codes›R00–R99›R90-R94›R94
- Billable — Valid for Submission
- Not Chronic
R94.111 is a billable ICD-10-CM diagnosis code for abnormal electroretinogram [ERG]. 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
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- a and b waves reduced
- Central response of multifocal electroretinogram abnormal
- Cone defect
- Dark adapted bright flash electroretinogram abnormal
- Dark adapted bright flash electroretinogram amplitude abnormal
- Dark adapted bright flash electroretinogram a-wave amplitude reduced
- Dark adapted bright flash electroretinogram b-wave amplitude supernormal
- Dark adapted bright flash electroretinogram timing abnormal
- Dark adapted dim flash electroretinogram abnormal
- Dark adapted dim flash electroretinogram amplitude abnormal
- Dark adapted dim flash electroretinogram timing abnormal
- Dark adapted electroretinogram abnormal
- Dark adapted electroretinogram response absent
- Electroretinogram abnormal
- Electroretinogram response absent
- ERG response
- Full-field electroretinogram abnormal
- Light adapted electroretinogram abnormal
- Light adapted electroretinogram response absent
- Light adapted flicker electroretinogram abnormal
- Light adapted flicker electroretinogram amplitude abnormal
- Light adapted flicker electroretinogram timing abnormal
- Light adapted single bright flash electroretinogram abnormal
- Light adapted single flash electroretinogram amplitude abnormal
- Light adapted single flash electroretinogram timing abnormal
- Light and dark adapted electroretinogram abnormal
- Light and dark adapted electroretinogram response absent
- Mixed rod and cone defect
- Multifocal electroretinogram abnormal
- Paracentral response of multifocal electroretinogram abnormal
- Pattern electroretinogram abnormal
- Pattern electroretinogram amplitude abnormal
- Pattern electroretinogram N95/P50 ratio abnormal
- Pattern electroretinogram response absent
- Pattern electroretinogram timing abnormal
- Pattern ERG finding
- Retinal function study abnormal
- Rod defect
- Selective b wave reduction
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Abnormal retinal function study
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Abnormal, abnormality, abnormalities - See Also: Anomaly;
- electroretinogram [ERG] - R94.111
- retinal function study - R94.111
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Abnormal, abnormality, abnormalities
- electroretinogram [ERG]
- Abnormal, abnormality, abnormalities
- retinal function study
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Retinal Disorders
The retina is a layer of tissue in the back of your eye that senses light and sends images to your brain. In the center of this nerve tissue is the macula. It provides the sharp, central vision needed for reading, driving and seeing fine detail.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert R94.111 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About R94.111Overview
Is R94.111 (Abnormal results of function studies of eye) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report abnormal electroretinogram [ERG] on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does R94.111 group to?
When abnormal electroretinogram [ERG] 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 R94.111 be a principal diagnosis?
Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal electroretinogram [ERG] is established, that condition takes the principal position instead.
What is the ICD-9 equivalent of R94.111?
Under the General Equivalence Mappings, abnormal electroretinogram [ERG] converts to ICD-9-CM 794.11 (abn retinal funct study). 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.
