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ICD-10-PCS 2027 procedure code

BY31YZZMagnetic Resonance Imaging (MRI) of Fetal Heart using Other Contrast

✓ Valid for 2027Female only

Short description: MRI of Fetal Heart using Oth Contrast

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 BY31YZZ

BY31YZZ is the ICD-10-PCS code for a magnetic resonance imaging (MRI) procedure on the fetal heart using an other contrast approach with none (qualifier: none). In ICD-10-PCS, magnetic resonance imaging (MRI) means computer reformatted digital display of multiplanar images developed from the capture of radiofrequency signals emitted by nuclei in a body site excited within a magnetic field.

In plain terms, this corresponds to magnetic resonance imaging of other and unspecified sites, the ICD-9-CM procedure title it maps to (88.97).

For a different body part, codes include BY30YZZ (fetal head), BY32YZZ (fetal thorax), BY33YZZ (fetal abdomen), BY34YZZ (fetal spine), BY35YZZ (fetal extremities) and BY36YZZ (whole fetus).

The same procedure with a different approach is coded BY31ZZZ (none).

With a different device, use BY31Y0Z (unenhanced and enhanced).

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
BImaging
2. Body System
YFetus and Obstetrical
3. Type
3Magnetic Resonance Imaging (MRI)

Computer reformatted digital display of multiplanar images developed from the capture of radiofrequency signals emitted by nuclei in a body site excited within a magnetic field

4. Body Part
1Fetal Heart
5. Contrast
YOther Contrast
6. Qualifier
ZNone
7. Qualifier
ZNone

Other versions of this procedure

Different contrast

ICD-9-CM equivalent

Converter →
  • 88.97Magnetic resonance imaging of other and unspecified 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 BY31YZZ

Is BY31YZZ a valid ICD-10-PCS code for 2027?

Yes. BY31YZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for BY31YZZ?

The CMS GEMs map BY31YZZ to ICD-9-CM 88.97 (Magnetic resonance imaging of other and unspecified sites).