ICD-10 Code D49.7 – Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D49.7 – Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system
What it is
D49.7 identifies a growth in an endocrine gland or other part of the nervous system whose behavior is not yet determined as benign or malignant. Use it when the record documents an unspecified neoplasm and the site fits this code.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect a mass effect, hormonal disturbance, or neurologic symptoms, depending on the site involved.
When to use this code
Use D49.7 when the provider documents a neoplasm of uncertain or unspecified behavior involving an endocrine gland or another nervous system site, and the pathology or clinical record does not state benign or malignant behavior. It is also appropriate when the site is clear but the behavior remains undecided. If the documentation names a specific benign or malignant tumor, do not default to this code.
Do not use for
Do not use this code for clearly benign or malignant neoplasms, or when the record identifies a different specific site code. Check documentation if the behavior or anatomic location is not explicit.
Coding tip
Verify both the site and the documented behavior before assigning D49.7.