C72.42 Malignant neoplasm of left acoustic nerve

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from C72 Malignant neoplasm of spinal cord, cranial nerves and other parts of central nervous system

Excludes1 (never code together)

• malignant neoplasm of meninges (C70.-)
• malignant neoplasm of peripheral nerves and autonomic nervous system (C47.-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 20 — Lung and Other Severe Cancers
• CMS-HCC V22: HCC 10 — Lymphoma and Other Cancers
• RxHCC V08: HCC 22 — Prostate, Breast, Bladder, and Other Cancers and Tumors
• ESRD V24: HCC 10

MS-DRG index

Defines the logic of DRG(s) 054-055 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 192.0 Malignant neoplasm of cranial nerves (approximate)

Code annotations containing back-references to C72.42

Back-references to C72.4

• Type 1 Excludes: C71 Malignant neoplasm of brain ("malignant neoplasm of cranial nerves (C72.2-C72.5)")

Nearby codes

• C72.31 Malignant neoplasm of right optic nerve
• C72.32 Malignant neoplasm of left optic nerve
• C72.4 Malignant neoplasm of acoustic nerve
• C72.40 Malignant neoplasm of unspecified acoustic nerve
• C72.41 Malignant neoplasm of right acoustic nerve
• C72.42 Malignant neoplasm of left acoustic nerve (this code)
• C72.5 Malignant neoplasm of other and unspecified cranial nerves
• C72.50 Malignant neoplasm of unspecified cranial nerve
• C72.59 Malignant neoplasm of other cranial nerves
• C72.9 Malignant neoplasm of central nervous system, unspecified