ICD10BillableValid for clinical use
ICD-10 Code E23.3: Hypothalamic dysfunction, not elsewhere classified
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 Endocrine, nutritional and metabolic diseases (E00-E89).
When is it used?
- May be used when a clinician documents hypothalamic dysfunction, not elsewhere classified 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
4Endocrine, nutritional and metabolic diseases (E00-E89)
block
E20-E35Disorders of other endocrine glands
category
E23Hypofunction and other disorders of the pituitary gland
currentE23
Official coding notes
Excludes1 (do not code together)
- Prader-Willi syndrome (Q87.11)
- Russell-Silver syndrome (Q87.19)
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
EndocrinologistGeneral Physician
Related codes
Sibling codes
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
HCPCS J1071high
INJECTION, TESTOSTERONE CYPIONATE, 1 MG
Source: CMS coverage guidance
HCPCS J3121high
INJECTION, TESTOSTERONE ENANTHATE, 1 MG
Source: CMS coverage guidance
HCPCS J3145high
INJECTION, TESTOSTERONE UNDECANOATE, 1 MG
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 237728000high
Absent osmoregulation
Source: SNOMED International ICD-10 map
SNOMED_CT 237725002high
Defective osmoregulation
Source: SNOMED International ICD-10 map
SNOMED_CT 399100005high
Disorder of hypothalamus
Source: SNOMED International ICD-10 map
SNOMED_CT 32641000119107high
Exercise induced hypothalamic insufficiency
Source: SNOMED International ICD-10 map
SNOMED_CT 1231423008high
Hypoplasia of hypothalamus
Source: SNOMED International ICD-10 map
SNOMED_CT 1255269005high
Hypothalamic adipsic hypernatraemia syndrome
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
E23.3
Common synonyms
Hypothalamic dysfunction, not elsewhere classified
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.