ICD-10 D44
Non-Billable HeaderNeoplasm of uncertain behavior of endocrine glands
About ICD-10-CM D44
ICD-10-CM code D44 represents Neoplasm of uncertain behavior of endocrine glands. This is a non-billable header code in the Neoplasms chapter (block D44). The 2026 edition of ICD-10-CM D44 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with D44. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- 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)
Medicare LCD Coverage for D44
Local Coverage Determinations (LCDs) from CMS MACs that list D44 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing D44.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but D44 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with D44
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To D44
Other codes in section D37-D48 (Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes).
ICD-10 D44, Billing FAQ
Is ICD-10 code D44 billable? +
No, D44 is a non-billable header code. Use a more specific child code from block D44 when submitting claims.
What codes are Type 1 Excludes for D44? +
Type 1 Excludes (never code together with D44): multiple endocrine adenomatosis (E31.2-); multiple endocrine neoplasia (E31.2-); neoplasm of uncertain behavior of endocrine pancreas (D37.8)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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