Difference Between Modifiers 76 and 77

For this week, I thought I’d talk about 2 common modifiers used in diagnostic radiology–modifier 76 and 77. Let’s be honest though–talking about modifiers is probably not the most exciting coding thing to talk about–but it’s important. I’ll do my best to explain it in such a way that you actually read the whole article without getting bored– 🙂

So–modifier 76. If you look at the CPT book it says-

Ok, so the keywords here are ‘Repeat Procedure’ and ‘Same Physician.”


Now let’s look at modifier 77:


The keywords to look at here are ‘Repeat Procedure‘ by “Another Physician.’

So the difference between these modifiers is that modifier 76 is for a repeat procedure by the same physician on the same day, and modifier 77 is for a repeat procedure by a different physician on the same day.

In diagnostic radiology, I would say these modifiers are most commonly used on x-rays. Sometimes the same patient might need the same x-ray taken a few times during the course of the day. It could be x-rays for broken bones or chest x-rays to monitor different issues over time.


Le’ts look at a very common code- 71045. This is the CPT code for a 1 view chest x-ray.


Say if a patient had:

A 71045 was done at 8 am- read by Dr Smith, then later the same day

A 71045- done at 2 pm- read by Dr Smith

So basically this patient had 71045 done twice the same day. To bill these out, you have to add a modifier. In this case, this is the same procedure, read by the same physician. What modifier would you use?

You would add a modifier 76 to show that it’s a repeat CPT read by same radiologist. The 76 would go on the 71045 billed at 2 pm.


Let’s look at another example:

Say if a patient had:

71045 done at 9 am, read by Dr Smith, then later the same day

71045 done at 2 pm ready by Dr Jones

Now which modifier would you use? You would use a modifier 77 to show that this patient had 2 separate 71045’s done the same day, but NOT read by the same dr. You would add a modifier 77 on the 71045 from 2 pm. Does this make sense? You would use these modifiers to bill out 2 separate 71045’s the same day. You’re just trying to tell the insurance company if the same radiologist read the films or not. If you forget to add these modifiers, the insurance company most likely will think you made a mistake and billed out the same exam twice and deny one.

**Just a reminder–always follow client specific guidelines and insurance specific guidelines.

Questions? Feel free to comment below or email me at


Thanks for reading-



Midnight Medical Coding Products You Might Be Interested In:


Learn The 50 Most Common X-Ray CPT Codes-

Self-paced online course. Getting awesome reviews from fellow coders.




15 Questions Practice Coding Test

Practice coding the ICD-10-CM and CPT codes of HIPAA compliant X-ray reports. Answers and rationales provided.






Join the Midnight Medical Coding Stars- A membership only area where one HIPAA compliant diagnostic radiology report is added each week for you to code the ICD-10-CM and CPT codes. Answers provided.


Join the Midnight Medical Coding Stars







Tabs for the ICD-10-CM Book: Get 60 printed, multi-colored, double-sided tabs.










Like This Post? Subscribe To Our Blog!

* indicates required

If you sign up for our blog, you agree to receive awesome blog posts and emails from Midnight Medical Coding. We will not send spam or anything annoying.


ICD-10 Coding Tips

Beginners Guide To Coding Fractures Using ICD-10-CM- Part 1

I have to admit, I was a little disturbed this week after reading through comments on a Facebook post. The post was about the different 7th characters and what they mean and when to add them. This is something that can be confusing for sure. The question was fine–it was the answers that scared me a little. I realized after reading that post, that many coders (not even new coders–I’m talking about experienced coders–do not understand seventh character A.

If you have your ICD-10-CM book around, please look in the beginning section of Chapter 19. Or just to make it easier–here is a pic from my book:



Please see what I’ve underlined above. “The 7th character is based on whether the patient is undergoing active treatment and not whether the provider is seeing the patient for the first time.” The key is active treatment. That is what the A means. It has nothing to do with the provider seeing the patient. For example, if someone goes to the ER and it turns out he/she has a broken wrist–that encounter will be coded with 7th character A. Say this same person now follows up with their regular doctor the following day–the fracture is still coded with an A. It doesn’t change based on the provider or anything like that. It has to do with whether or not the patient is receiving active treatment. This patient is still receiving active treatment, so it’s still coded with seventh character A.

I can write many more posts about fracture coding (and I will if that’s something you guys are interested in) but I felt like I had to post about this. It is all here in the guidelines.

Are any of you looking for practice reports to code? There are some available. There are 15 x-ray reports and for each one you code the ICD-10-CM and CPT. Rationales are included at the end. Click the button below for more info.

Questions? Please feel free to comment below or email me at

Like this Post? Subscribe To Our Blog!

* indicates required

Save For Later:

Coding Course

Intro To X-Ray CPT Coding Class Is On Sale!


Intro To X-Ray CPT Coding- Learn The 50 Most Common X-Ray CPT Codes is on sale. Today only! There are literally hundreds of CPT codes used in diagnostic radiology coding. Trouble is, these codes are not focused on in many general coding classes. This leaves new coders barely scraping by once they’re on the job, especially if they’re expected to know these codes already. If you’re a newbie or a coder in another specialty who wants to learn the basics of X-Ray CPT coding-this is the class to sign up for! It is all online and self-paced. You can email the instructor (that’s me-Lindsay Della Vella BS, COC) anytime if you have questions. This class is backed up by great reviews from former and current students. I hope you’ll join us! Price is $39.99. Today Only. Payment plan available.

Go HERE to see what exactly is include in the class, read reviews and sign up!

Coding Course

On Sale Now!

Are you a medical coder or medical coding student who wants to learn more about diagnostic radiology coding?

There are A LOT of codes in the CPT book and you’re probably only familiar with the ones you use everyday.

So, if you’re a coder in another specialty, or a coding student, you might not know that much about the CPT coding of x-ray’s just because you haven’t had the opportunity to code them yet, or maybe it’s something that really wasn’t focused on in your regular coding classes.

Our new online coding class is available now! It focuses on the CPT coding of x-rays. You will code HIPAA compliant reports after each lesson and do coding practice exercises, take quizzes (your score is available immediately after submitting it) and there is test at the end. Supplemental info/sources/links are also provided. It is all online and self-paced.

The instructor (me- Lindsay Della Vella!) is available 24/7 through email for questions.

This class is getting excellent reviews from fellow coders who have already completed it. I hope you join us!

It is on sale NOW for $39.99! Offer expires Sunday at 5 pm EST.

Click the link to sign up and for more info.

Still have questions? Feel free to email me at

Youtube tutorial

X-Ray Coding–A Walk-Through With Examples

If you’re new to radiology coding, or just want to learn more about it, this is a good video for you to watch. It is a quick 5 minute tutorial where I go over the format of an x ray report and the elements that should be included. There is also a practice report in it for you to code the cpt and icd-10 code.

Thank you for watching this tutorial!