D33.3 vs D49.7

D33.3 (Benign neoplasm of cranial nerves) compared with D49.7 (Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system), from the official CMS tabular data. D33.3 and D49.7 name the same anatomical site (acoustic nerve) 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

↔

D33.3

Benign neoplasm of cranial nerves

Same anatomical site, different neoplasm behavior.

Same site — benign neoplasm (acoustic nerve)

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 D33.3 name the same anatomical site (acoustic nerve) 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

	D33.3Benign neoplasm of cranial nerves	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 cranial nerves is a billable ICD-10-CM diagnosis code (D33.3).	Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system is a billable ICD-10-CM diagnosis code (D49.7).
Includes	Benign neoplasm of olfactory bulb	'growth' NOS neoplasm NOS new growth NOS tumor NOS

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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