Coding Ahead
CasePilot
Medical Coding Assistant
CaseConsultant
Instant Email Coding Consultant
Case2Code
Search and Code Lookup Tool
CareerCenter
Medical Coding Job Board
Log in Register free account
0 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account
CPT®
0155U

CPT® Code 0155U

Official Description

Oncology (breast cancer), DNA, PIK3CA (phosphatidylinositol-4,5-bisphosphate 3-kinase, catalytic subunit alpha) (eg, breast cancer) gene analysis (ie, p.C420R, p.E542K, p.E545A, p.E545D [g.1635G>T only], p.E545G, p.E545K, p.Q546E, p.Q546R, p.H1047L, p.H1047R, p.H1047Y), utilizing formalin-fixed paraffin-embedded breast tumor tissue, reported as PIK3CA gene mutation status

© Copyright 2026 American Medical Association. All rights reserved.

CasePilot
Have a question about CPT® Code 0155U?

Get instant expert-level answers from CasePilot, our coding assistant.

Register to view content

Create a free account to unlock this content
Register to view content

Create a free account to unlock this content
Register to view content

Create a free account to unlock this content
Register to view content

Create a free account to unlock this content
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"