G37.3 Acute transverse myelitis in demyelinating disease of central nervous system

The ICD-10-CM code for Acute transverse myelitis in demyelinating disease of central nervous system is G37.3 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

G35-G37: Demyelinating diseases of the central nervous system (G35-G37)

Category G37

11 codes (9 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to G37.3:

• Myelopathy (spinal cord) › transverse, acute
• Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute) › transverse (in demyelinating diseases of central nervous system)

Inclusion Terms

• Acute transverse myelitis NOS
• Acute transverse myelopathy

U.S. Hospital Utilization

• An estimated 8,220 U.S. inpatient stays in 2023 included G37.3 among the documented diagnoses.
• 3,215 stays listed it as the principal diagnosis.

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)