ICD10BillableValid for clinical use
ICD-10 Code D44.9: Neoplasm of uncertain behavior of unspecified endocrine 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 unspecified endocrine 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 Physician
Related codes
D44.0Neoplasm of uncertain behavior of thyroid glandcodeD44.1Neoplasm 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 paragangliacode
Sibling codes
D44.0Neoplasm of uncertain behavior of thyroid glandbillableD44.1Neoplasm 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 paragangliabillable
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 64417high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; AXILLARY NERVE, INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64416high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; BRACHIAL PLEXUS, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT), INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64415high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; BRACHIAL PLEXUS, INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64448high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; FEMORAL NERVE, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT), INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 404810003high
5-HT secreting neuroendocrine tumour
Source: SNOMED International ICD-10 map
SNOMED_CT 387922007high
Neoplasm of endocrine gland
Source: SNOMED International ICD-10 map
SNOMED_CT 387927001high
Neoplasm of endocrine system
Source: SNOMED International ICD-10 map
SNOMED_CT 94820008high
Neoplasm of uncertain behavior of endocrine gland
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
D44.9
Common synonyms
Neoplasm of uncertain behavior of unspecified endocrine glandNeoplasm of uncertain behavior of endocrine 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.