Coding and coverage · ICD-10-CM

D00

D00.0 Carcinoma in situ of lip, oral cavity and pharynx

Not billable (header)Chapter 2

Report one of the more specific codes below.

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Codes under this one

  • D00.00 Carcinoma in situ of oral cavity, unspecified site
  • D00.01 Carcinoma in situ of labial mucosa and vermilion border
  • D00.02 Carcinoma in situ of buccal mucosa
  • D00.03 Carcinoma in situ of gingiva and edentulous alveolar ridge
  • D00.04 Carcinoma in situ of soft palate
  • D00.05 Carcinoma in situ of hard palate
  • D00.06 Carcinoma in situ of floor of mouth
  • D00.07 Carcinoma in situ of tongue
  • D00.08 Carcinoma in situ of pharynx

Instructional notes

Chapter 2

Notes
  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Section D00-D09

Includes
  • Bowen's disease
  • erythroplasia
  • grade III intraepithelial neoplasia
  • Queyrat's erythroplasia

D00

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

This code

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • carcinoma in situ of aryepiglottic fold or interarytenoid fold, laryngeal aspect (D02.0)
  • carcinoma in situ of epiglottis NOS (D02.0)
  • carcinoma in situ of epiglottis suprahyoid portion (D02.0)
  • carcinoma in situ of skin of lip (D03.0, D04.0)
Use additional codeAdd a second code for the full picture.
  • 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)

Chapter 2: Neoplasms · D00-D09 In situ neoplasms (D00-D09)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.