U.S. ICD-10-CM · FY 2027

C12 ICD-10-CM Code: Malignant neoplasm of pyriform sinus

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

C12

Malignant neoplasm of pyriform sinus

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where C12 sits

  1. 1

    Chapter 2

    Neoplasms (C00-D49)

  2. 2

    Section

    Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)

  3. 3

    Category C12

    Malignant neoplasm of pyriform sinus

  4. 4

    Code C12

    Malignant neoplasm of pyriform sinus

Documentation details

Notes for this code

Inclusion terms

  • Malignant neoplasm of pyriform fossa

Code first

No “code first” instruction is listed for C12.

Use additional code

  • code to identify:
  • 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)

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for C12.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for C12.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code C12 mean?

C12 is the FY 2027 U.S. ICD-10-CM code for “Malignant neoplasm of pyriform sinus.”

Is C12 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, C12 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is C12 located in ICD-10-CM?

C12 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of lip, oral cavity and pharynx (C00-C14) (C00–C14), under category C12, Malignant neoplasm of pyriform sinus.

What coding notes are listed for C12?

Its listed inclusion terms are Malignant neoplasm of pyriform fossa. No code-first instruction is listed. Additional-code instructions: code to identify:; 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). No Excludes1 note is listed. No Excludes2 note is listed.

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