{"code":"D44","type":"category","title":"Neoplasm of uncertain behavior of endocrine glands","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["multiple endocrine adenomatosis (E31.2-)","multiple endocrine neoplasia (E31.2-)","neoplasm of uncertain behavior of endocrine pancreas (D37.8)","neoplasm of uncertain behavior of ovary (D39.1-)","neoplasm of uncertain behavior of testis (D40.1-)","neoplasm of uncertain behavior of thymus (D38.4)","neoplasms of unspecified behavior (D49.-)"],"excludes2":[],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"sibling_codes":["D44.0","D44.1","D44.2","D44.3","D44.4","D44.5","D44.6","D44.7","D44.9"],"inclusionTerms":[],"sibling_titles":{"code":"D44.9","title":"Neoplasm of uncertain behavior of unspecified endocrine gland","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Neoplasm of uncertain behavior of endocrine glands is a non-billable ICD-10-CM category code (D44). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","officialDefinition":"Neoplasm of uncertain behavior of endocrine glands is a non-billable ICD-10-CM category code (D44). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[{"code":"D44.0","title":"Neoplasm of uncertain behavior of thyroid gland","description":"Neoplasm of uncertain behavior of thyroid gland is a billable ICD-10-CM diagnosis code (D44.0). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","isBillable":true,"slug":"d44.0-neoplasm-of-uncertain-behavior-of-thyroid-gland"},{"code":"D44.1","title":"Neoplasm of uncertain behavior of adrenal gland","description":"Neoplasm of uncertain behavior of adrenal gland is a non-billable ICD-10-CM category code (D44.1). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-). Use additional code: code to identify any functional activity..","isBillable":false,"slug":"d44.1-neoplasm-of-uncertain-behavior-of-adrenal-gland"},{"code":"D44.10","title":"Neoplasm of uncertain behavior of unspecified adrenal gland","description":"Neoplasm of uncertain behavior of unspecified adrenal gland is a billable ICD-10-CM diagnosis code (D44.10). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-). Use additional code: code to identify any functional activity..","isBillable":true,"slug":"d44.10-neoplasm-of-uncertain-behavior-of-unspecified-adrenal-gland"},{"code":"D44.11","title":"Neoplasm of uncertain behavior of right adrenal gland","description":"Neoplasm of uncertain behavior of right adrenal gland is a billable ICD-10-CM diagnosis code (D44.11). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-). Use additional code: code to identify any functional activity..","isBillable":true,"slug":"d44.11-neoplasm-of-uncertain-behavior-of-right-adrenal-gland"},{"code":"D44.12","title":"Neoplasm of uncertain behavior of left adrenal gland","description":"Neoplasm of uncertain behavior of left adrenal gland is a billable ICD-10-CM diagnosis code (D44.12). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-). Use additional code: code to identify any functional activity..","isBillable":true,"slug":"d44.12-neoplasm-of-uncertain-behavior-of-left-adrenal-gland"},{"code":"D44.2","title":"Neoplasm of uncertain behavior of parathyroid gland","description":"Neoplasm of uncertain behavior of parathyroid gland is a billable ICD-10-CM diagnosis code (D44.2). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","isBillable":true,"slug":"d44.2-neoplasm-of-uncertain-behavior-of-parathyroid-gland"},{"code":"D44.3","title":"Neoplasm of uncertain behavior of pituitary gland","description":"Neoplasm of uncertain behavior of pituitary gland is a billable ICD-10-CM diagnosis code (D44.3). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-). Use additional code: code to identify any functional activity..","isBillable":true,"slug":"d44.3-neoplasm-of-uncertain-behavior-of-pituitary-gland"},{"code":"D44.4","title":"Neoplasm of uncertain behavior of craniopharyngeal duct","description":"Neoplasm of uncertain behavior of craniopharyngeal duct is a billable ICD-10-CM diagnosis code (D44.4). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","isBillable":true,"slug":"d44.4-neoplasm-of-uncertain-behavior-of-craniopharyngeal-duct"},{"code":"D44.5","title":"Neoplasm of uncertain behavior of pineal gland","description":"Neoplasm of uncertain behavior of pineal gland is a billable ICD-10-CM diagnosis code (D44.5). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","isBillable":true,"slug":"d44.5-neoplasm-of-uncertain-behavior-of-pineal-gland"},{"code":"D44.6","title":"Neoplasm of uncertain behavior of carotid body","description":"Neoplasm of uncertain behavior of carotid body is a billable ICD-10-CM diagnosis code (D44.6). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","isBillable":true,"slug":"d44.6-neoplasm-of-uncertain-behavior-of-carotid-body"},{"code":"D44.7","title":"Neoplasm of uncertain behavior of aortic body and other paraganglia","description":"Neoplasm of uncertain behavior of aortic body and other paraganglia is a billable ICD-10-CM diagnosis code (D44.7). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","isBillable":true,"slug":"d44.7-neoplasm-of-uncertain-behavior-of-aortic-body-and-other-paraganglia"},{"code":"D44.9","title":"Neoplasm of uncertain behavior of unspecified endocrine gland","description":"Neoplasm of uncertain behavior of unspecified endocrine gland is a billable ICD-10-CM diagnosis code (D44.9). Excludes1 (not coded here): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8); neoplasm of uncertain behavior of ovary (D39.1-); neoplasm of uncertain behavior of testis (D40.1-); neoplasm of uncertain behavior of thymus (D38.4); neoplasms of unspecified behavior (D49.-).","isBillable":true,"slug":"d44.9-neoplasm-of-uncertain-behavior-of-unspecified-endocrine-gland"}],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}