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ICD10BillableValid for clinical use

ICD-10 Code G11.5: Hypomyelination - hypogonadotropic hypogonadism - hypodontia

G11.5 is a billable ICD-10 diagnosis code used to classify Hypomyelination - hypogonadotropic hypogonadism - hypodontia 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 Diseases of the nervous system (G00-G99).

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 Diseases of the nervous system (G00-G99).

When is it used?

  • May be used when a clinician documents hypomyelination - hypogonadotropic hypogonadism - hypodontia 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
6Diseases of the nervous system (G00-G99)
block
G10-G14Systemic atrophies primarily affecting the central nervous system
category
G11Hereditary ataxia
currentG11

Official coding notes

Inclusion terms
  • 4H syndrome
  • Pol III-related leukodystrophy

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.

Related specialists

NeurologistGeneral Physician

Coverage-related procedures and services

HCPCS G0539high
CAREGIVER TRAINING IN BEHAVIOR MANAGEMENT/MODIFICATION FOR CAREGIVER(S) OF PATIENTS WITH A MENTAL OR PHYSICAL HEALTH DIAGNOSIS, ADMINISTERED BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL (WITHOUT THE PATIENT PRESENT), FACE-TO-FACE; INITIAL 30 MINUTES
Source: CMS coverage guidance
HCPCS G0540high
CAREGIVER TRAINING IN BEHAVIOR MANAGEMENT/MODIFICATION FOR PARENT(S)/GUARDIAN(S)/CAREGIVER(S) OF PATIENTS WITH A MENTAL OR PHYSICAL HEALTH DIAGNOSIS, ADMINISTERED BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL (WITHOUT THE PATIENT PRESENT), FACE-TO-FACE; EACH ADDITIONAL 15 MINUTES
Source: CMS coverage guidance
HCPCS G0300high
DIRECT SKILLED NURSING SERVICES OF A LICENSED PRACTICAL NURSE (LPN) IN THE HOME HEALTH OR HOSPICE SETTING, EACH 15 MINUTES
Source: CMS coverage guidance
HCPCS G0299high
DIRECT SKILLED NURSING SERVICES OF A REGISTERED NURSE (RN) IN THE HOME HEALTH OR HOSPICE SETTING, EACH 15 MINUTES
Source: CMS coverage guidance

Coding guidelines

Common synonyms

Hypomyelination - hypogonadotropic hypogonadism - hypodontia

Frequently asked questions

Code details

CodeG11.5
SystemICD10
Display nameHypomyelination - hypogonadotropic hypogonadism - hypodontia
ChapterDiseases of the nervous system (G00-G99)
BlockSystemic atrophies primarily affecting the central nervous system

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Hypomyelination - hypogonadotropic hypogonadism - hypodontiaLeukodystrophySyndrome

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.