ICD10BillableValid for clinical use

ICD-10 Code Q06.4: Hydromyelia

Q06.4 is a billable ICD-10 diagnosis code used to classify Hydromyelia in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

When is it used?

  • May be used when a clinician documents hydromyelia in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
17Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
block
Q00-Q07Congenital malformations of the nervous system
category
Q06Other congenital malformations of spinal cord
currentQ06

Official coding notes

Inclusion terms
  • Hydrorachis

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Coverage-related procedures and services

CPT 70460high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70450high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 70470high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL, FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SECTIONS
Source: CMS coverage guidance
CPT 95886high
NEEDLE ELECTROMYOGRAPHY, EACH EXTREMITY, WITH RELATED PARASPINAL AREAS, WHEN PERFORMED, DONE WITH NERVE CONDUCTION, AMPLITUDE AND LATENCY/VELOCITY STUDY; COMPLETE, FIVE OR MORE MUSCLES STUDIED, INNERVATED BY THREE OR MORE NERVES OR FOUR OR MORE SPINAL LEVELS (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 95885high
NEEDLE ELECTROMYOGRAPHY, EACH EXTREMITY, WITH RELATED PARASPINAL AREAS, WHEN PERFORMED, DONE WITH NERVE CONDUCTION, AMPLITUDE AND LATENCY/VELOCITY STUDY; LIMITED (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 95887high
NEEDLE ELECTROMYOGRAPHY, NON-EXTREMITY (CRANIAL NERVE SUPPLIED OR AXIAL) MUSCLE(S) DONE WITH NERVE CONDUCTION, AMPLITUDE AND LATENCY/VELOCITY STUDY (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
Q06.4

Common synonyms

Hydromyelia

Frequently asked questions

Code details

CodeQ06.4
SystemICD10
Display nameHydromyelia
ChapterCongenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
BlockCongenital malformations of the nervous system

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
HydromyeliaHydrorachis

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code Q06.4 for Hydromyelia | HealthAssure