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ICD-10-PCS 2027 procedure code

CH21SZZTomographic (Tomo) Nuclear Medicine Imaging of Left Breast using Thallium 201 (Tl-201)

✓ Valid for 2027

Short description: Tomo Nucl Med Imag of L Breast using Thallium 201

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About CH21SZZ

CH21SZZ is the ICD-10-PCS code for a tomographic (tomo) nuclear medicine imaging procedure on the left breast using a thallium 201 (tl-201) approach with none (qualifier: none). In ICD-10-PCS, tomographic (tomo) nuclear medicine imaging means introduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions.

In plain terms, this corresponds to scan of other sites, the ICD-9-CM procedure title it maps to (92.19).

For a different body part, codes include CH20SZZ (right breast) and CH22SZZ (bilateral breasts).

The same procedure with a different approach is coded CH211ZZ (technetium 99m (tc-99m)) and CH21YZZ (other radionuclide).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

What each character means

1. Section
CNuclear Medicine
2. Body System
HSkin, Subcutaneous Tissue and Breast
3. Type
2Tomographic (Tomo) Nuclear Medicine Imaging

Introduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions

4. Body Part
1Breast, Left
5. Radionuclide
SThallium 201 (Tl-201)
6. Qualifier
ZNone
7. Qualifier
ZNone

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 92.19Scan of other sitesapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about CH21SZZ

Is CH21SZZ a valid ICD-10-PCS code for 2027?

Yes. CH21SZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for CH21SZZ?

The CMS GEMs map CH21SZZ to ICD-9-CM 92.19 (Scan of other sites).