Hi, Tabitha. This looks great, and I have only a few suggestions.
First, your heading should read Tabitha Collins, CPC. Many employers require certification, and want to be able to see that when they glance at your resume. You wouldn't want your resume to be set aside because a hiring manager couldn't tell.
Secondly, when you open the word document, red and green underlines appear to suggest spelling and grammar errors. If at all possible, eliminate these from your resume. I do this by creating my resume in a .pdf file. If you keep it as a word document, make sure your resume is read-only. I could edit yours from my PC.
Where you say "years of experience", indicate how many years. Experience is often a requirement, and you don't want to make hiring managers have to do the math!
Consider another heading: Software proficiency. Since managers are looking to see what billing programs you know how to use, sometimes a separate heading will set this information apart from the fact that you understand CPT.
Other than that, it's very well done. Good luck!
