M67.811 is from the Code Set M67: "Other" Disorders of the Synovium and Tendon. "Other" usually seems to mean "none of the above" and therefore is very nonspecific as a diagnosis code. M67.811 revers specifically to a "disorder" of the synovium of the right shoulder. This Code Set is really very vague ("non-specific") and almost meaningless as a diagnosis, which may be the problem with getting approval/compensation for 20610, Injection Major Joint or Bursa, when the two are submitted together. I think you need a much more specific diagnosis in order for the two of them to work. As it regards the shoulder in particular, I would try to get one from the M75 Code Set for Shoulder Lesions, if possible. If not there, then from M65: Synovitis and Tenosynovitis, from which there is M65.81_ for "Other" Synovitis and Tenosynovitis of the Shoulder, but again not as specific as you would like. If the shoulder problem is "Work Related" and from Use, Overuse, and Pressure, then one M75.81_ might apply, but unfortunately this is another "Other." The M75 Code Set is the most "specific" for Shoulder Problems.
Hopefully this helps you. I would refer you to my Blog regarding coding shoulder pain at icd10orthocoder.com, where I have tried to sort this out.
Respectfully submitted, Alan Pechacek, M.D.