G90.09 Other idiopathic peripheral autonomic neuropathy

The ICD-10-CM code for Other idiopathic peripheral autonomic neuropathy is G90.09 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

6: Diseases of the nervous system (G00-G99)

Section

G89-G99: Other disorders of the nervous system (G89-G99)

Category G90

27 codes (21 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to G90.09:

• Sphenopalatine ganglion neuralgia
• Faciocephalalgia, autonomic
• Weiss-Baker syndrome
• Insufficiency, insufficient › idiopathic autonomic
• Bradycardia (sinoatrial) (sinus) (vagal) › reflex
• Syndrome › Hilger's
• Neuralgia, neuralgic (acute) › sphenopalatine (ganglion)
• Syndrome › Charcot-Weiss-Baker

Inclusion Terms

• Idiopathic peripheral autonomic neuropathy NOS

U.S. Hospital Utilization

• An estimated 2,270 U.S. inpatient stays in 2023 included G90.09 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)