2026 ICD-10-CM Diagnosis Code G93.45Developmental and epileptic encephalopathy

ICD-10-CM Codes›G00–G99›G89-G99›G93

ICD-10-CM G93.45
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G93.45 is a billable ICD-10-CM diagnosis code for developmental and epileptic encephalopathy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Epilepsy; convulsions and Other nervous system disorders (often hereditary or degenerative).

Code Identity

ICD-10-CM Code
G93.45
Billable Status
Yes — Valid for Submission
Code Describes
Developmental and epileptic encephalopathy
Short Description
Developmental and epileptic encephalopathy
Same as the full description in the CMS dataset.
Parent Code
G93.4
Other and unspecified encephalopathy

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG93Other disorders of brain
This CodeG93.45Developmental and epileptic encephalopathy

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Early infantile epileptic encephalopathy

Code Also

  • , if applicable, associated disorders such as:
  • developmental disorders of scholastic skills F81
  • developmental disorder of speech and language F80
  • epilepsy, by specific type G40
  • intellectual disabilities F70 F79
  • other neurodevelopmental disorder F88
  • pervasive developmental disorders F84

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.

    • Encephalopathy(acute)
      • developmental and epileptic
    • Encephalopathy(acute)
      • early infantile epileptic

Clinical ClassificationClinical

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

CCSR NVS009
Epilepsy; convulsions
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR NVS006
Other nervous system disorders (often hereditary or degenerative)
Default principal diagnosis: inpatient No · outpatient No

Code History & ChangesHistory

Replacement G93.45 replaces the following previously assigned code(s):

  • G93.49 - Other encephalopathy
FY 2025AddedAdded to the ICD-10-CM code setEffective October 1, 2024.
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G93.45Overview

Is G93.45 (Other and unspecified encephalopathy) a billable code?

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

What MS-DRG does G93.45 group to?

When developmental and epileptic encephalopathy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 974, 975, 976, with relative weights from 0.8945 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.