What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).
đź“‹Clinical 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 hypothyroidism in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
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.
- This entry may represent a broader category rather than the most specific billable code.
đź©şClinical 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.
🔍Key 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.
- This parent page groups multiple hypothyroid patterns, so the final billable code usually depends on whether the chart identifies congenital, drug-induced, postinfectious, atrophic, myxedema-coma, other specified, or unspecified hypothyroidism more specifically.
- Documentation that describes hypothyroidism is coded differently from thyroiditis, thyrotoxicosis, hyperparathyroidism, or other endocrine disorders without documented thyroid-hormone deficiency.
Important exclusions
- iodine-deficiency related hypothyroidism (E00-E02)
- postprocedural hypothyroidism (E89.0)
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
currentE00-E07
Official coding notes
Excludes1 (do not code together)
- iodine-deficiency related hypothyroidism (E00-E02)
- postprocedural hypothyroidism (E89.0)
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
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 comacodeE03.8Other specified hypothyroidismcodeE03.9Hypothyroidism, unspecifiedcode
Sibling codes
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
E03
Replacement codes
E03.0 — Congenital hypothyroidism with diffuse goiterE03.1 — Congenital hypothyroidism without goiterE03.2 — Hypothyroidism due to medicaments and other exogenous substancesE03.3 — Postinfectious hypothyroidismE03.4 — Atrophy of thyroid (acquired)E03.5 — Myxedema comaE03.8 — Other specified hypothyroidismE03.9 — Hypothyroidism, unspecified
Common synonyms
Other 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.