DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

C01 diagnosis code · Billable category · FY2027

C01 Malignant neoplasm of base of tongue

  • Billable
  • Not CC/MCC
  • HCC 21
  • POA reported

C01 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

CC / MCC
Neither
MS-DRG
011-013, 146-148
HCC V28
21
POA
Reported
Code Editor
–
Index entries
0

Instructions

At C01

Inclusion terms

  • Malignant neoplasm of dorsal surface of base of tongue
  • Malignant neoplasm of fixed part of tongue NOS
  • Malignant neoplasm of posterior third of tongue

Use additional code

  • code to identify:
  • alcohol abuse and dependence (F10.-) F10
  • history of tobacco dependence (Z87.891) Z87.891
  • 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.

Medicare grouping and edits

CMS files for C01
CC / MCCNeither
Appendix BPre-MDC, MS-DRG 011-013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC…); MDC 03 Diseases and Disorders of the Ear, Nose, Mouth and Throat, MS-DRG 146-148 (Ear, Nose, Mouth and Throat Malignancy with MCC…)
Code Editor–
POAReported
HCC V28HCC 21 Lymphoma and Other Cancers

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy