Rotator Cuff Repair- not repairable

This is a 2 part question.

First my surgeon was attempting to fix the patient's rotator cuff tear. He began arthroscopic and it was not going well so he changed to open.

The tear was pretty bad... "the stitch pulled out of the tissue as he had very poor quality rotator cuff tissue. At this point, it was determined that his rotator cuff was not repairable so I copiously irrigated the subacromial space."

The first question is would I cpt 23410 and append a 53 modifier (for discontinued procedure).

2nd question is this. The surgery was started as arthroscopic. He did a subacromial decompression and acromioplasty arthroscopically. And then he attempted to correct the rotator cuff arthroscopically. That was when he changed to open, due to the complexity of the rotator cuff injury.

29826 [subacromial decompression and acromioplasty] is an add-on code. I cannot bill this if there is no other procedure. Since the doctor converted to open, am I able to bill subacromial decompression and acromioplasty as open [23130] ??

Rotator Cuff Repair- not repairable