C10.3 Malignant neoplasm of posterior wall of oropharynx

Billable ICD-10-CM code, FY2026.

Applies from C10 Malignant neoplasm of oropharynx

Excludes2 (not included here)

• malignant neoplasm of tonsil (C09.-)

Use additional code

• code to identify:
• alcohol abuse and dependence (F10.-)
• exposure to environmental tobacco smoke (Z77.22)
• exposure to tobacco smoke in the perinatal period (P96.81)
• history of tobacco dependence (Z87.891)
• occupational exposure to environmental tobacco smoke (Z57.31)
• tobacco dependence (F17.-)
• tobacco use (Z72.0)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 21 — Lymphoma and Other Cancers
• CMS-HCC V22: HCC 11 — Colorectal, Bladder, and Other Cancers
• ESRD V24: HCC 11

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 146.7 Malignant neoplasm of posterior wall of oropharynx

Nearby codes

• C10 Malignant neoplasm of oropharynx
• C10.0 Malignant neoplasm of vallecula
• C10.1 Malignant neoplasm of anterior surface of epiglottis
• C10.2 Malignant neoplasm of lateral wall of oropharynx
• C10.3 Malignant neoplasm of posterior wall of oropharynx (this code)
• C10.4 Malignant neoplasm of branchial cleft
• C10.8 Malignant neoplasm of overlapping sites of oropharynx
• C10.9 Malignant neoplasm of oropharynx, unspecified