ICD10BillableValid for clinical use
ICD-10 Code E03.8: Other specified hypothyroidism
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).
šClinical overview
This ICD-10 code is commonly used when documentation describes hypothyroidism or another closely related thyroid-hormone deficiency pattern in the E03 family. The most accurate code depends on whether the record identifies congenital, drug-induced, postinfectious, atrophic, myxedema-coma, other specified, or unspecified hypothyroidism.
When is it used?
- May be used when a clinician documents other specified hypothyroidism 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.
š©ŗClinical context
When commonly used
- Primary-care, endocrinology, inpatient, and utilization-review workflows where thyroid-hormone deficiency, thyroid replacement follow-up, or severe decompensated hypothyroid illness is part of the assessment.
- Coding workflows where the chart identifies congenital status, medication or exogenous cause, infection-related onset, myxedema-coma severity, or another specific hypothyroid pattern that changes final code specificity.
Common workup
- Common related testing on this page includes TSH, Free T4, Anti-thyroid peroxidase antibody.
Common management context
- Evaluation often includes TSH and free-thyroxine review, symptom assessment for fatigue, cold intolerance, constipation, weight change, or altered mental status, and thyroid-replacement or endocrine follow-up planning.
- Documentation usually becomes more specific when the chart identifies congenital versus acquired disease, drug-related or postinfectious cause, thyroid atrophy, myxedema-coma severity, or another specified hypothyroid pattern.
- Specialist context already linked on this page includes Endocrinologist, General Physician.
šKey distinctions
Important notes
- This ICD-10 family captures hypothyroidism and closely related thyroid-hormone deficiency states rather than thyroiditis, hyperthyroidism, or non-thyroid endocrine disorders.
- Cause and severity detail, such as congenital pattern, exogenous cause, postinfectious state, thyroid atrophy, myxedema coma, other specified form, or unspecified disease, drives final code specificity inside this family.
- Other specified hypothyroidism is coded separately from congenital, drug-induced, postinfectious, myxedema-coma, and unspecified hypothyroid patterns when the chart documents another specific form.
- Documentation that describes hypothyroidism is coded differently from thyroiditis, thyrotoxicosis, hyperparathyroidism, or other endocrine disorders without documented thyroid-hormone deficiency.
Related codes to consider
E03.0Congenital hypothyroidism with diffuse goiter
Related hypothyroidism ICD-10 code; documentation often becomes more specific when the chart identifies congenital versus acquired disease, drug-induced or postinfectious cause, myxedema coma, or another specified versus unspecified hypothyroid pattern.
E03.1Congenital hypothyroidism without goiter
Related hypothyroidism ICD-10 code; documentation often becomes more specific when the chart identifies congenital versus acquired disease, drug-induced or postinfectious cause, myxedema coma, or another specified versus unspecified hypothyroid pattern.
E03.2Hypothyroidism due to medicaments and other exogenous substances
Related hypothyroidism ICD-10 code; documentation often becomes more specific when the chart identifies congenital versus acquired disease, drug-induced or postinfectious cause, myxedema coma, or another specified versus unspecified hypothyroid pattern.
E03.3Postinfectious hypothyroidism
Related hypothyroidism ICD-10 code; documentation often becomes more specific when the chart identifies congenital versus acquired disease, drug-induced or postinfectious cause, myxedema coma, or another specified versus unspecified hypothyroid pattern.
Code hierarchy
chapter
4Endocrine, nutritional and metabolic diseases (E00-E89)
block
E00-E07Disorders of thyroid gland
category
E03Other hypothyroidism
currentE03
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 tests
TSH
Commonly reviewed in hypothyroidism evaluation.
Free T4
Often reviewed alongside TSH in thyroid assessment.
Anti-thyroid peroxidase antibody
May be relevant when autoimmune thyroid disease is being considered.
Related codes
E03.0Congenital hypothyroidism with diffuse goitercodeE03.1Congenital hypothyroidism without goitercodeE03.2Hypothyroidism due to medicaments and other exogenous substancescodeE03.3Postinfectious hypothyroidismcodeE03.4Atrophy of thyroid (acquired)codeE03.5Myxedema comacodeE03.9Hypothyroidism, unspecifiedcode
Sibling codes
E03.0Congenital hypothyroidism with diffuse goiterbillableE03.1Congenital hypothyroidism without goiterbillableE03.2Hypothyroidism due to medicaments and other exogenous substancesbillableE03.3Postinfectious hypothyroidismbillableE03.4Atrophy of thyroid (acquired)billableE03.5Myxedema comabillableE03.9Hypothyroidism, unspecifiedbillable
Coverage-related procedures and services
CPT 00532high
ANESTHESIA FOR ACCESS TO CENTRAL VENOUS CIRCULATION
Source: CMS coverage guidance
CPT 01420high
ANESTHESIA FOR ALL CAST APPLICATIONS, REMOVAL, OR REPAIR INVOLVING KNEE JOINT
Source: CMS coverage guidance
CPT 01730high
ANESTHESIA FOR ALL CLOSED PROCEDURES ON HUMERUS AND ELBOW
Source: CMS coverage guidance
CPT 01380high
ANESTHESIA FOR ALL CLOSED PROCEDURES ON KNEE JOINT
Source: CMS coverage guidance
CPT 01820high
ANESTHESIA FOR ALL CLOSED PROCEDURES ON RADIUS, ULNA, WRIST, OR HAND BONES
Source: CMS coverage guidance
CPT 00322high
ANESTHESIA FOR ALL PROCEDURES ON ESOPHAGUS, THYROID, LARYNX, TRACHEA AND LYMPHATIC SYSTEM OF NECK; NEEDLE BIOPSY OF THYROID
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 722940002high
Acquired central hypothyroidism
Source: SNOMED International ICD-10 map
SNOMED_CT 1179384008high
Acquired central hypothyroidism caused by ionising radiation
Source: SNOMED International ICD-10 map
SNOMED_CT 1179381000high
Acquired central hypothyroidism due to Sheehan syndrome
Source: SNOMED International ICD-10 map
SNOMED_CT 1179382007high
Acquired central hypothyroidism due to pituitary disorder
Source: SNOMED International ICD-10 map
SNOMED_CT 55838005high
Athyrotic hypothyroidism sequence
Source: SNOMED International ICD-10 map
SNOMED_CT 237519003high
Autoimmune hypothyroidism
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
E03.8
Common synonyms
Other specified hypothyroidism
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.