D35.7 vs D49.7

D35.7 (Benign neoplasm of other specified endocrine glands) compared with D49.7 (Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system), from the official CMS tabular data. D35.7 and D49.7 name the same anatomical site (endocrine gland) with a different neoplasm behavior.

Relationship

Informational

Neoplasm table relationship

D49.7

Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system

↔

D35.7

Benign neoplasm of other specified endocrine glands

Same anatomical site, different neoplasm behavior.

Same site — benign neoplasm (endocrine gland)

The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.

Source: CMS Table of Neoplasms

Can these codes be reported together?

Same site, different neoplasm behavior. D49.7 and D35.7 name the same anatomical site (endocrine gland) with a different neoplasm behavior.

From the CMS Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.

Side by side

	D35.7Benign neoplasm of other specified endocrine glands	D49.7Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system
Billing status	Billable	Billable
Classification	C00-D49 — Neoplasms (C00-D49)	C00-D49 — Neoplasms (C00-D49)
Definition	Benign neoplasm of other specified endocrine glands is a billable ICD-10-CM diagnosis code (D35.7).	Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system is a billable ICD-10-CM diagnosis code (D49.7).
Includes	—	'growth' NOS neoplasm NOS new growth NOS tumor NOS
Use additional code	code to identify any functional activity	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources