2026 ICD-10-CM Diagnosis Code G90.01Carotid sinus syncope

ICD-10-CM Codes›G00–G99›G89-G99›G90

ICD-10-CM G90.01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G90.01 is a billable ICD-10-CM diagnosis code for carotid sinus syncope. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as carotid sinus hypersensitivity. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other nervous system disorders (often hereditary or degenerative) and Syncope.

Code Identity

ICD-10-CM Code
G90.01
Billable Status
Yes — Valid for Submission
Code Describes
Carotid sinus syncope
Short Description
Carotid sinus syncope
Same as the full description in the CMS dataset.
Parent Code
G90.0
Idiopathic peripheral autonomic neuropathy

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG90Disorders of autonomic nervous system
This CodeG90.01Carotid sinus syncope

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Carotid sinus hypersensitivity
  • Carotid sinus syncope
  • Carotidynia

Tabular List NotesGuidance

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

Inclusion Terms

  • Carotid sinus syndrome

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.

    • Carotid body or sinus syndrome
    • Carotidynia
    • Hypersensitive, hypersensitiveness, hypersensitivity
      • carotid sinus
    • Sensitive, sensitivity
      • carotid sinus
    • Syncope(near) (pre-)
      • carotid sinus
    • Syndrome
      • carotid
        • body
    • Syndrome
      • carotid
        • sinus

Clinical ClassificationClinical

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

CCSR NVS006
Other nervous system disorders (often hereditary or degenerative)
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR SYM001
Syncope
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Fainting

Fainting is a temporary loss of consciousness. If you're about to faint, you'll feel dizzy, lightheaded, or nauseous. Your field of vision may "white out" or "black out." Your skin may be cold and clammy. You lose muscle control at the same time, and may fall down.

Read the full article at MedlinePlus

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

Convert G90.01 to ICD-9-CMHistory

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

ICD-9-CM
337.01 Carotid sinus syndrome
Approximate The match is approximate rather than exact.

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 G90.01Overview

Is G90.01 (Idiopathic peripheral autonomic neuropathy) a billable code?

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

What is the ICD-9 equivalent of G90.01?

Under the General Equivalence Mappings, carotid sinus syncope converts to ICD-9-CM 337.01 (carotid sinus syndrome). The mapping is approximate, so confirm the match fits the documentation.

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.