HealthAssure
HealthAssureGood Life
ICD10

ICD-10 Code D00.0: Carcinoma in situ of lip, oral cavity and pharynx

D00.0 is an ICD-10 diagnosis entry used to group records related to Carcinoma in situ of lip, oral cavity and pharynx. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).

When is it used?

  • May be used when a clinician documents carcinoma in situ of lip, oral cavity and pharynx in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
  • This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter
2Neoplasms (C00-D49)
block
D00-D09In situ neoplasms
category
D00Carcinoma in situ of oral cavity, esophagus and stomach
currentD00

Official coding notes

Applicable to
  • 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 (do not code together)
  • 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 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)

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

OncologistGeneral Physician

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
D00.0
Replacement codes
D00.00 — Carcinoma in situ of oral cavity, unspecified siteD00.01 — Carcinoma in situ of labial mucosa and vermilion borderD00.02 — Carcinoma in situ of buccal mucosaD00.03 — Carcinoma in situ of gingiva and edentulous alveolar ridgeD00.04 — Carcinoma in situ of soft palateD00.05 — Carcinoma in situ of hard palateD00.06 — Carcinoma in situ of floor of mouthD00.07 — Carcinoma in situ of tongueD00.08 — Carcinoma in situ of pharynx

Common synonyms

Carcinoma in situ of lip, oral cavity and pharynx

Frequently asked questions

Code details

CodeD00.0
SystemICD10
Display nameCarcinoma in situ of lip, oral cavity and pharynx
ChapterNeoplasms (C00-D49)
BlockIn situ neoplasms

Flags

BillableNo
Valid clinical useNo

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.