What is the ICD‑10‑CM code for squamous cell carcinoma of the oropharynx?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: September 15, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

ICD-10-CM Code for Squamous Cell Carcinoma of the Oropharynx

The ICD-10-CM code for squamous cell carcinoma of the oropharynx is C10.9 (malignant neoplasm of oropharynx, unspecified), with more specific codes available based on the exact anatomical subsite within the oropharynx.

Specific Anatomical Coding

The oropharynx encompasses several distinct subsites, each with its own ICD-10-CM code:

  • C01 - Malignant neoplasm of base of tongue
  • C09 - Malignant neoplasm of tonsil (including tonsillar fossa, tonsillar pillar)
  • C10.0 - Malignant neoplasm of vallecula
  • C10.1 - Malignant neoplasm of anterior surface of epiglottis
  • C10.2 - Malignant neoplasm of lateral wall of oropharynx
  • C10.3 - Malignant neoplasm of posterior wall of oropharynx
  • C10.4 - Malignant neoplasm of branchial cleft
  • C10.8 - Malignant neoplasm of overlapping sites of oropharynx
  • C10.9 - Malignant neoplasm of oropharynx, unspecified

Clinical Context

The oropharynx is recognized as a distinctive anatomical subsite in the WHO classification 1. When coding oropharyngeal squamous cell carcinoma, always use the most specific anatomical code available based on the tumor location documented in the pathology report or clinical examination.

Important Coding Considerations

HPV status does not change the primary ICD-10 code. While p16 immunohistochemistry should be performed on all newly diagnosed oropharyngeal SCC cases 1, the HPV/p16 status is documented separately and does not alter the anatomical site code. HPV-positive oropharyngeal cancers have distinct prognostic implications but use the same anatomical coding system.

Common Pitfall

Do not confuse oropharyngeal cancer codes (C01, C09, C10.x) with other head and neck sites:

  • Oral cavity cancers use C00-C06 codes
  • Nasopharynx uses C11 codes
  • Hypopharynx uses C12-C13 codes
  • Larynx uses C32 codes

Always verify the exact anatomical location through endoscopic examination and pathology reports before assigning the final code, as treatment planning and prognosis differ significantly between these sites 1.

References

Related Questions

For a 70-year-old male receiving chemotherapy for oropharyngeal carcinoma with severe pain, what is the optimal route for morphine administration?
What ICD‑10‑CM diagnostic codes, other than screening codes, can be used for a Pap smear performed as part of the pre‑egg donation work‑up in a 19‑year‑old woman?
In a patient with carcinoma of the pharynx who develops a change in voice and a dry cough, what urgent evaluation and management steps are recommended?
What is the ICD‑10‑CM code for a malignant neoplasm of the upper‑outer quadrant of the right breast in a female patient who is estrogen‑receptor negative?
What is the ICD‑10‑CM code for a malignant neoplasm involving the posterior two‑thirds of the tongue?
What is the appropriate treatment for a recurrent genital herpes flare‑up in an immunocompetent adult?
How is hallux rigidus diagnosed?
When should mammography be performed, including during pregnancy or lactation?
How many days after the last cocaine use do withdrawal symptoms typically appear?
For a 5-year-old male of ideal weight, what is the appropriate dose and dosing frequency of ciprofloxacin?
How should a rash on the penis of an uncircumcised male be evaluated and managed?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.