DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

C11 Malignant neoplasm of nasopharynx

  • Header · not billable

C11 is not billable. The category heads 6 billable codes in FY2027: the 6 codes directly below it.

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. C00-C14 Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
  3. C11 Malignant neoplasm of nasopharynx
Billable codes
6
Subdivisions
6
CC / MCC codes
0 / 0
HCC V28 codes
6
New FY2027
0
Index entries
0

Codes in C11

  1. C11.0
    Malignant neoplasm of superior wall of nasopharynx
    Billable21
    Inclusion terms 1

    Inclusion terms

    • Malignant neoplasm of roof of nasopharynx
  2. C11.1
    Malignant neoplasm of posterior wall of nasopharynx
    Billable21
    Inclusion terms 2

    Inclusion terms

    • Malignant neoplasm of adenoid
    • Malignant neoplasm of pharyngeal tonsil
  3. C11.2
    Malignant neoplasm of lateral wall of nasopharynx
    Billable21
    Inclusion terms 3

    Inclusion terms

    • Malignant neoplasm of fossa of Rosenmüller
    • Malignant neoplasm of opening of auditory tube
    • Malignant neoplasm of pharyngeal recess
  4. C11.3
    Malignant neoplasm of anterior wall of nasopharynx
    Billable21
    Inclusion terms 4

    Inclusion terms

    • Malignant neoplasm of floor of nasopharynx
    • Malignant neoplasm of nasopharyngeal (anterior) (posterior) surface of soft palate
    • Malignant neoplasm of posterior margin of nasal choana
    • Malignant neoplasm of posterior margin of nasal septum
  5. C11.8
    Malignant neoplasm of overlapping sites of nasopharynx
    Billable21
  6. C11.9
    Malignant neoplasm of nasopharynx, unspecified
    Billable21
    Inclusion terms 1

    Inclusion terms

    • Malignant neoplasm of nasopharyngeal wall NOS

Sources of each column.

Instructions

At C11

Use additional code

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

Notes that also apply

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.

Hierarchy