246XS1301X Sonography Specialist/Technologist Cardiovascular

Definition

A cardiovascular sonography technologist operates special equipment to create images and conduct tests of the cardiovascular system. They work with physicians who view the images and test results to assess and diagnose medical conditions.

— NUCC Health Care Provider Taxonomy, version 26.1

Where 246XS1301X sits

• Group: Technologists, Technicians & Other Technical Service Providers — code 19 of 65 in the group
• Classification: Specialist/Technologist Cardiovascular 246X00000X
• Specialization: Sonography 246XS1301X

Choose 246XS1301X over the general Specialist/Technologist Cardiovascular code (246X00000X) when the provider's training or certification is specifically in sonography; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.

Medicare

246XS1301X has no entry in the CMS Medicare Provider and Supplier Taxonomy Crosswalk. That usually means Medicare does not enroll this kind of provider under its own specialty — the provider can still hold an NPI and use this code on claims to other payers.

Related codes

History of 246XS1301X

NUCC's notes record no dated changes for 246XS1301X. The code set is republished every January and July, when codes are added, retitled or marked inactive; this page reflects version 26.1, so check the NUCC site if you are reading it after the next release.

Using 246XS1301X

The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.

Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV). Checked 2026-10-24. Methodology.