C91 Planar Nuclear Medicine Imaging - Ear, Nose, Mouth and Throat ICD-10-PCS
The C91 code range contains 4 ICD-10-PCS codes for Planar Nuclear Medicine Imaging procedures on the ear, nose, mouth and throat. 3 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
Root Operation Definition
Planar Nuclear Medicine Imaging: Introduction of radioactive materials into the body for single plane display of images developed from the capture of radioactive emissions.
Codes in the C91 Range 4 codes · 3 billable
- C91 Nuclear Medicine, Ear, Nose, Mouth and Throat, Planar Nuclear Medicine ImagingNon-billable header
- C91B1ZZ Planar Nuclear Medicine Imaging of Bilateral Salivary Glands using Technetium 99m (Tc-99m)
- C91BYZZ Planar Nuclear Medicine Imaging of Bilateral Salivary Glands using Other Radionuclide
- C91YYZZ Planar Nuclear Medicine Imaging of Ear, Nose, Mouth and Throat using Other Radionuclide
About the C91 Code Range
The ICD-10-PCS root operation Planar Nuclear Medicine Imaging (Code C91) involves capturing two-dimensional images of specific body regions using radionuclides. This procedure is classified under the Nuclear Medicine section and focuses on functional imaging rather than direct visualization.
Planar Nuclear Medicine Imaging is applied to the Ear, Nose, Mouth, and Throat area to assess physiological processes or detect abnormalities by tracing radioactive substances within tissues. The included codes such as C91B1ZZ and C91BYZZ demonstrate imaging of the bilateral salivary glands with different radionuclides like Technetium 99m (Tc-99m) or other radioisotopes. Additionally, C91YYZZ covers planar imaging of the entire Ear, Nose, Mouth and Throat region using other radionuclides. These codes capture the diagnostic approach used in nuclear medicine to evaluate functional anatomy by measuring the distribution of radioactive tracers in the head and neck region, aiding clinical decision-making.
Questions About This Page
How many billable codes are in the C91 range?
Of the 4 codes in this range, 3 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the C91 range classify?
The range classifies Planar Nuclear Medicine Imaging procedures, introduction of radioactive materials into the body for single plane display of images developed from the capture of radioactive emissions, performed on the ear, nose, mouth and throat. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
