ICD10BillableValid for clinical use
ICD-10 Code E03.0: Congenital hypothyroidism with diffuse goiter
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 congenital hypothyroidism with diffuse goiter 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.
- Congenital hypothyroidism with diffuse goiter is coded separately from congenital hypothyroidism without goiter and from acquired hypothyroid patterns.
- Documentation that describes hypothyroidism is coded differently from thyroiditis, thyrotoxicosis, hyperparathyroidism, or other endocrine disorders without documented thyroid-hormone deficiency.
Important exclusions
- transitory congenital goiter with normal function (P72.0)
Related codes to consider
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.
E03.4Atrophy of thyroid (acquired)
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
Official coding notes
Inclusion terms
- Congenital parenchymatous goiter (nontoxic)
- Congenital goiter (nontoxic) NOS
Excludes1 (do not code together)
- transitory congenital goiter with normal function (P72.0)
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
Sibling codes
E03.1Congenital hypothyroidism without goiterbillableE03.2Hypothyroidism due to medicaments and other exogenous substancesbillableE03.3Postinfectious hypothyroidismbillableE03.4Atrophy of thyroid (acquired)billableE03.5Myxedema comabillableE03.8Other specified hypothyroidismbillableE03.9Hypothyroidism, 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 1179400001high
Congenital hypothyroidism due to dual oxidase maturation factor 2
Source: SNOMED International ICD-10 map
SNOMED_CT 1179397005high
Congenital hypothyroidism due to symporter mutation
Source: SNOMED International ICD-10 map
SNOMED_CT 1179399008high
Congenital hypothyroidism due to thyroglobulin mutation
Source: SNOMED International ICD-10 map
SNOMED_CT 1179396001high
Congenital hypothyroidism due to thyroid deiodinase mutation
Source: SNOMED International ICD-10 map
SNOMED_CT 1179394003high
Congenital hypothyroidism due to thyroid peroxidase mutation
Source: SNOMED International ICD-10 map
SNOMED_CT 278503003high
Congenital hypothyroidism with diffuse goitre
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
E03.0
Common synonyms
Congenital hypothyroidism with diffuse goiter
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.