ICD10BillableValid for clinical use
ICD-10 Code D44.0: Neoplasm of uncertain behavior of thyroid gland
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 Neoplasms (C00-D49).
When is it used?
- May be used when a clinician documents neoplasm of uncertain behavior of thyroid gland 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
2Neoplasms (C00-D49)
block
D37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
category
D44Neoplasm of uncertain behavior of endocrine glands
currentD44
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
OncologistGeneral PhysicianEndocrinologist
Related codes
D44.1Neoplasm of uncertain behavior of adrenal glandcategoryD44.2Neoplasm of uncertain behavior of parathyroid glandcodeD44.3Neoplasm of uncertain behavior of pituitary glandcodeD44.4Neoplasm of uncertain behavior of craniopharyngeal ductcodeD44.5Neoplasm of uncertain behavior of pineal glandcodeD44.6Neoplasm of uncertain behavior of carotid bodycodeD44.7Neoplasm of uncertain behavior of aortic body and other paragangliacodeD44.9Neoplasm of uncertain behavior of unspecified endocrine glandcode
Sibling codes
D44.1Neoplasm of uncertain behavior of adrenal glandD44.2Neoplasm of uncertain behavior of parathyroid glandbillableD44.3Neoplasm of uncertain behavior of pituitary glandbillableD44.4Neoplasm of uncertain behavior of craniopharyngeal ductbillableD44.5Neoplasm of uncertain behavior of pineal glandbillableD44.6Neoplasm of uncertain behavior of carotid bodybillableD44.7Neoplasm of uncertain behavior of aortic body and other paragangliabillableD44.9Neoplasm of uncertain behavior of unspecified endocrine glandbillable
Coverage-related procedures and services
CPT 81546high
ONCOLOGY (THYROID), MRNA, GENE EXPRESSION ANALYSIS OF 10,196 GENES, UTILIZING FINE NEEDLE ASPIRATE, ALGORITHM REPORTED AS A CATEGORICAL RESULT (EG, BENIGN OR SUSPICIOUS)
Source: CMS coverage guidance
CPT 81479high
UNLISTED MOLECULAR PATHOLOGY PROCEDURE
Source: CMS coverage guidance
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
CPT 64417high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; AXILLARY NERVE, INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 447711004high
Follicular neoplasm of thyroid
Source: SNOMED International ICD-10 map
SNOMED_CT 1382242008high
Follicular thyroid neoplasm of uncertain malignant potential
Source: SNOMED International ICD-10 map
SNOMED_CT 1382243003high
Hyalinizing trabecular neoplasm of thyroid
Source: SNOMED International ICD-10 map
SNOMED_CT 83191000119105high
Incidentaloma of thyroid gland
Source: SNOMED International ICD-10 map
SNOMED_CT 127019004high
Neoplasm of thyroglossal duct
Source: SNOMED International ICD-10 map
SNOMED_CT 127018007high
Neoplasm of thyroid gland
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
D44.0
Common synonyms
Neoplasm of uncertain behavior of thyroid gland
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.