C12 — Malignant neoplasm of pyriform sinus

Billable

Is C12 billable?

Yes — C12 is billable for FY2027. C12 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. C12 may be submitted for encounters from October 1, 2026 through September 30, 2027.

C12 at a glance

Code	C12
Description	Malignant neoplasm of pyriform sinus
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does C12 group to?

C12 sits in MDC Pre and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

011Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCCsurgical
012Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CCsurgical
013Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCCsurgical

Use additional code

Report an additional code alongside C12 to fully describe the condition. C12 is sequenced first.

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)

Inclusion terms

Alternative wording in documentation that is classified to C12.

Malignant neoplasm of pyriform fossa

How long has C12 existed?

C12 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.