ICD10BillableValid for clinical use
ICD-10 Code G11.5: Hypomyelination - hypogonadotropic hypogonadism - hypodontia
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
Related codes
G11.0Congenital nonprogressive ataxiacodeG11.1Early-onset cerebellar ataxiacategoryG11.2Late-onset cerebellar ataxiacodeG11.3Cerebellar ataxia with defective DNA repaircodeG11.4Hereditary spastic paraplegiacodeG11.6Leukodystrophy with vanishing white matter diseasecodeG11.8Other hereditary ataxiascodeG11.9Hereditary ataxia, unspecifiedcode
Sibling codes
G11.0Congenital nonprogressive ataxiabillableG11.1Early-onset cerebellar ataxiaG11.2Late-onset cerebellar ataxiabillableG11.3Cerebellar ataxia with defective DNA repairbillableG11.4Hereditary spastic paraplegiabillableG11.6Leukodystrophy with vanishing white matter diseasebillableG11.8Other hereditary ataxiasbillableG11.9Hereditary ataxia, unspecifiedbillable
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
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.