2026 ICD-10-CM Diagnosis Code D44Neoplasm of uncertain behavior of endocrine glands

ICD-10-CM Codes›C00–D49›D37-D48›D44

ICD-10-CM D44
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D44 is a non-billable ICD-10-CM category code for neoplasm of uncertain behavior of endocrine glands, so it cannot be submitted on claims. Use a more specific code from this category instead, such as D44.0, D44.10, D44.11, and D44.12.

Code Identity

ICD-10-CM Code
D44
Billable Status
No — Non-Billable Category
Code Describes
Neoplasm of uncertain behavior of endocrine glands
Chapter
D37-D48
Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes

Code Classification

ChapterC00–D49Neoplasms
SectionD37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
CategoryD44Neoplasm of uncertain behavior of endocrine glands
This CodeD44Neoplasm of uncertain behavior of endocrine glands

Specific Coding for Neoplasm of uncertain behavior of endocrine glandsOverview

Non-specific codes like D44 require more characters. Use one of these billable codes instead:

  • Use D44.0 for Neoplasm of uncertain behavior of thyroid gland

  • D44.1 for Neoplasm of uncertain behavior of adrenal gland

  • Use D44.10 for Neoplasm of uncertain behavior of unspecified adrenal gland

  • Use D44.11 for Neoplasm of uncertain behavior of right adrenal gland

  • Use D44.12 for Neoplasm of uncertain behavior of left adrenal gland

  • Use D44.2 for Neoplasm of uncertain behavior of parathyroid gland

  • Use D44.3 for Neoplasm of uncertain behavior of pituitary gland

  • Use D44.4 for Neoplasm of uncertain behavior of craniopharyngeal duct

  • Use D44.5 for Neoplasm of uncertain behavior of pineal gland

  • Use D44.6 for Neoplasm of uncertain behavior of carotid body

  • Use D44.7 for Neoplasm of uncertain behavior of aortic body and other paraganglia

  • Use D44.9 for Neoplasm of uncertain behavior of unspecified endocrine gland

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • 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

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Adenoma
      • endocrine, multiple
        • two or more specified sites
    • Adenoma
      • multiple endocrine
        • two or more specified sites

Patient EducationClinical

Endocrine Diseases

Your endocrine system includes eight major glands throughout your body. These glands make hormones. Hormones are chemical messengers. They travel through your bloodstream to tissues or organs. Hormones work slowly and affect body processes from head to toe. These include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D44Overview

Is D44 (Neoplasm of uncertain behavior of endocrine glands) a billable code?

No. This is a category header that groups the codes for neoplasm of uncertain behavior of endocrine glands, and headers cannot be submitted on claims. Claims for neoplasm of uncertain behavior of endocrine glands need a more specific code from this category, such as D44.0, D44.10, and D44.11.